OBD-II Code P2067: Fuel Level Sensor 'B' Circuit Low

What Does P2067 Mean? 🎬 Watch: A quick overview of what code P2067 means.

P2067 means the Powertrain Control Module (PCM) is receiving a voltage signal from the secondary fuel level sensor ('Sensor B') that falls below the minimum expected range. This indicates a short to ground or a sensor that has failed with near-zero internal resistance. Modern vehicles with large or complex 'saddle' tanks use two sensors ('A' and 'B') to accurately measure fuel levels across the entire tank.

Technical definition: The official SAE/OBD-II definition is "Fuel Level Sensor 'B' Circuit Low". The PCM expects a variable voltage (e.g., 0.5V empty to 4.5V full) from the secondary fuel level sensor. It sets this code when the signal remains consistently near or below 0.2V, indicating a short to ground, a failed sensor, or a wiring fault.

Can I Drive With P2067?

Yes, But With Caution. Yes, but it is a significant gamble. Your fuel gauge becomes completely unreliable, creating a high risk of running out of fuel and being stranded. Repeatedly running the tank dry causes the fuel pump to overheat, as it relies on liquid fuel for cooling. This leads to premature fuel pump failure, transforming a minor sensor issue into a $500-$1500+ repair. Track your mileage manually and schedule a repair promptly.

Common Causes

• Faulty Fuel Level Sensor 'B' (Often Integrated into Pump Module) (Very Common) — The sensor itself is the most frequent point of failure. The internal variable resistor wears out, breaks, or shorts internally, pulling the circuit voltage low. 🎬 See how to test a fuel level sensor with a multimeter. In many vehicles, this sensor is integrated into the fuel pump assembly, requiring the entire module to be replaced as a single unit.
• Damaged Wiring or Connectors (Common) — The wiring harness between the fuel tank and the PCM gets damaged, chafed by road debris, or corroded, leading to a short to ground. Connectors on top of the fuel tank exposed to the elements frequently become loose or filled with moisture. A short to ground is the primary wiring suspect for a 'Circuit Low' code.
• Improperly Installed Component or Pinched Wire (Less Common) — This code frequently appears immediately after a fuel pump or sensor replacement if a wire is pinched between the tank and the body during reassembly, creating a short to ground. This is a common misdiagnosis pitfall where the new part is blamed for an installation error.
• Stuck or Damaged Float Arm (Less Common) — The float arm that moves with the fuel level gets stuck in the lowest position due to tank deformation or an internal obstruction. It also physically breaks, causing the sensor to send a constant, incorrect low-level signal.
• Faulty Instrument Panel Cluster (IPC) (Rare) — On specific vehicles (notably from Nissan and Ford 🎬 Watch: Troubleshooting erratic fuel gauges and cluster issues on Fords.), the instrument cluster processes the raw data from the fuel sensors. A failure in the cluster's internal circuitry or solder joints leads to an incorrect interpretation of the sensor signal, triggering a P2067 code even if the sensor and wiring are perfectly fine.
• Contaminants or Debris in Fuel Tank (Rare) — Foreign objects or significant debris in the fuel tank obstruct the movement of the fuel level float, causing it to stick permanently in the 'empty' position.
• Electrical System Interference or Low Voltage (Very Rare) — Poor grounding of the fuel tank, interference from high-current accessories, or a failing battery lowers system-wide voltage. This injects noise into the sensor circuit, which the PCM interprets as a low voltage condition. Consider this if multiple unrelated electrical codes appear simultaneously.
• Faulty Powertrain Control Module (PCM) (Very Rare) — The PCM itself fails on rare occasions. A fault in the PCM's input circuitry causes it to misread the signal from a perfectly good sensor. This is the absolute last item to consider after exhaustively testing all wiring and components.

Symptoms

• Check Engine Light is On — The Malfunction Indicator Lamp (MIL) illuminates on your dashboard.
• Erratic Fuel Gauge and Range Displays — The fuel gauge sticks on empty, fluctuates wildly, or sticks on full. Consequently, the vehicle's trip computer provides incorrect 'Distance to Empty' calculations, often showing '---' or a static low number.
• Low Fuel Warning Light Stays On — The low fuel light illuminates and remains on, even immediately after filling the tank completely.
• Vehicle Enters Limp Mode (Diesel Specific) — In certain diesel vehicles where this code structure ties to the Diesel Exhaust Fluid (DEF) level, a low level reading triggers a 'limp mode,' reducing engine power to prevent emissions system damage.

Common Fixes & Costs

• Replace Fuel Pump Module Assembly — Parts: $300-$800, Labor: $300-$600, ~2.5 hr book time (Intermediate)
• Replace Fuel Level Sensor Only — Parts: $50-$200, Labor: $200-$400, ~2.2 hr book time (Intermediate)
• Repair Wiring or Connectors — Parts: $10-$50, Labor: $150-$400, ~2 hr book time (DIY)
• Clean Corroded Connectors — Parts: $5-$20, Labor: $50-$150, ~0.8 hr book time (DIY)
• Replace/Repair Instrument Panel Cluster (IPC) — Parts: $100-$700, Labor: $100-$300, ~1.5 hr book time (Professional)
• Replace Powertrain Control Module (PCM) — Parts: $600-$1200, Labor: $200-$300, ~1.2 hr book time (Professional)

Used vs. New Parts: Buying Guide

When a used part is worth it: For a fuel pump module, buying used is almost never recommended. The labor to replace the part is significant, often requiring the fuel tank to be dropped. If a used part fails, you must pay the labor cost a second time. The risk does not justify the small savings.

Donor-vehicle mileage cap: roughly under 40000 miles for the part to have meaningful remaining life.

Donor quality checklist:

• Verify the donor vehicle had low mileage and was not scrapped due to fuel system issues.
• Avoid parts from salvage yards where they are stored exposed to the elements, which causes corrosion and contamination.
• Ensure the part number matches exactly, as even slight variations cause compatibility problems.

Decision logic:

• If The part is a complete fuel pump module assembly → Buy new (OEM or high-quality aftermarket like Delphi or Bosch). The risk of premature failure of a used part is too high given the labor cost to install.
• If Vehicle is older and budget is extremely tight → A used part is a high-risk gamble. You might get lucky, but expect a significantly shorter lifespan and be prepared for the possibility of doing the job twice.
• If You are buying the sensor only (not the full pump assembly) → New is still strongly preferred. A used sensor has unknown wear and fails shortly after installation.

Warranty tradeoff: Used parts typically have a 30-90 day warranty at best, which does not cover labor. New aftermarket parts often have a 1-year to lifetime warranty. New OEM parts carry a 1-2 year warranty.

Worst-case if a used part fails: $400-$600 if used part fails after install — this represents the cost of repeating the labor, plus the cost of another part.

What Happens If You Wait — Timeline

1. 0-4 weeks: Code P2067 is set, Check Engine Light is on. The fuel gauge reads empty or erratically, and the 'Distance to Empty' is unreliable. There are no physical performance symptoms. (MPG impact: 0%% · Added cost: $0)
2. 1-3 months: The driver is forced to guess fuel levels, leading to a high risk of running the tank completely dry. Each time the tank runs dry, the fuel pump is starved of its coolant and lubricant, causing it to overheat and suffer accelerated wear. (MPG impact: 0%% · Added cost: $0-$50 in inconvenience (e.g., needing roadside assistance for fuel))
3. 3-9 months: After several instances of running dry, the fuel pump begins to fail. Symptoms of a failing pump appear, such as a whining noise from the tank, difficulty starting the engine, sputtering, or loss of power under acceleration. (MPG impact: 0-5% (due to poor fuel delivery from the failing pump)% · Added cost: $50-$100 in wasted fuel and worsening performance)
4. 9+ months: The fuel pump fails completely. The vehicle cranks but will not start, leaving you stranded. The initial sensor circuit problem has now caused a major component failure, requiring replacement of the entire fuel pump module. (MPG impact: N/A (vehicle is inoperable)% · Added cost: $1000-$1500 (for parts and labor to replace the complete fuel pump assembly))

Cost of Not Fixing It

• Immediate: Inconvenience and risk of being stranded. The fuel gauge is unreliable, making it easy to run out of fuel unexpectedly. (Added cost: 0)
• 1-3 months: Increased wear on the fuel pump. Repeatedly running the tank low or dry causes the pump to ingest air instead of fuel, leading to overheating and accelerated wear. Fuel is used to cool and lubricate the pump. (Added cost: 0)
• 3+ months: Premature fuel pump failure. A pump that continuously overheats eventually fails completely, leaving the vehicle unable to start. This turns a sensor issue into a much more expensive repair. (Added cost: $1000-$1500)

Diagnosis Steps

1. Check for Technical Service Bulletins (TSBs)
   Before starting any diagnosis, check for manufacturer TSBs for your vehicle's year and model. There is often a known issue with an updated part or a specific repair procedure available, saving significant time and money.
   Tools: Online TSB Database Access (Beginner)
2. Read Trouble Codes & Review Live Data
   Use an advanced OBD-II scanner to confirm P2067 is active and check for other codes. Navigate to the live data stream and monitor the voltage PIDs for Fuel Level Sensor 'A' and 'B'. A reading for Sensor 'B' that is consistently near zero or below the manufacturer's specified threshold (e.g., under 0.2V) confirms the 'circuit low' condition. Compare Sensor 'A' and 'B' PIDs; a large discrepancy points to the faulty sensor.
   Tools: Advanced OBD-II Scanner (Beginner)
3. [PRO TIP] Force the Opposite Code
   Disconnect the fuel level sensor 'B' connector. This creates an open circuit. Scan for codes again. A P2068 (Fuel Level Sensor 'B' Circuit High) should appear. If you still get a P2067, the signal wire is shorted to ground somewhere in the harness between the connector and the PCM. If P2068 appears, the wiring is intact, and the sensor itself is the prime suspect.
   Tools: OBD-II Scanner (Intermediate)
4. Visually Inspect Wiring and Connectors
   Perform a thorough visual inspection of the wiring harness from the fuel tank to the PCM. Look for chafing, melting, corrosion, or pinched wires. Pay close attention to the main connector on top of the fuel pump module, which is a common failure point due to exposure.
   Tools: Flashlight, Mirror (Intermediate)
5. Test Sensor Resistance
   Disconnect the sensor and use a digital multimeter to measure its resistance in ohms across the correct pins. Compare this reading to the manufacturer's specifications (e.g., a normal range for many GM vehicles is 40Ω empty to 250Ω full). A reading near zero ohms indicates an internally shorted sensor. Manually move the float arm and watch for a smooth, linear change in resistance.
   Tools: Digital Multimeter, Service Manual (Intermediate)
6. Check for Shorts to Ground
   With the sensor connector and PCM connector both disconnected, use a multimeter set to ohms. Check for continuity between the signal wire pin at the sensor connector and a known good chassis ground. If you read a low resistance (ideally it should be an open loop, OL), it confirms a short to ground in the wiring harness that must be located and repaired.
   Tools: Digital Multimeter (Advanced)
7. Verify Reference Voltage
   With the key on (engine off), back-probe the sensor connector. Use a multimeter to verify the presence of the correct reference voltage, which is typically 5V or 12V depending on the system. If the reference voltage is missing or low, there is a problem with the PCM or the wiring providing power to the sensor.
   Tools: Digital Multimeter, Wiring Diagram (Advanced)
8. [PRO TIP] Perform a Voltage Drop Test
   To find a poor ground connection, perform a voltage drop test. Connect the positive lead of a multimeter to the battery negative terminal and the negative lead to the ground pin at the sensor connector (with it connected and key on). A reading above 100-200 millivolts (0.1-0.2V) indicates excessive resistance in the ground circuit that needs to be traced and cleaned.
   Tools: Digital Multimeter (Advanced)
9. Check Fuel Pressure (Contextual)
   This step does not diagnose the P2067 electrical code directly, but it is a crucial health check if you are already planning to replace the entire fuel pump module. With the key on and engine off (KOEO), connect a fuel pressure gauge. For a typical V8 truck, you should see 55-62 PSI. Low or no pressure indicates a failed pump, justifying the replacement of the whole module.
   Tools: Fuel Pressure Gauge (Advanced)
10. [PRO TIP] Analyze with an Oscilloscope
    For intermittent issues, a multimeter is too slow. Connect a lab scope to the sensor's signal wire. While sloshing fuel in the tank or driving, watch the waveform. A healthy sensor produces a smooth, continuous line that moves up and down with the fuel level. A faulty sensor shows sharp vertical dropouts to zero volts, spikes, or flat lines in the pattern, definitively identifying an internal sensor failure.
    Tools: Automotive Oscilloscope (Professional)

When This Code Triggers (Freeze-Frame Conditions)

• Fault Trigger: Voltage < 0.2V for > 5 seconds (This is not a performance-based code; it is an electrical circuit test. The PCM continuously monitors the sensor voltage. The code sets when the voltage remains below the minimum threshold for a set period, regardless of engine RPM, load, or speed.)
• Fuel Tank Level (Sensor A): Any value (e.g., 65%) (The reading from the primary sensor ('A') is often plausible, while the 'B' sensor reads near zero, creating a large discrepancy that the PCM flags as a fault.)
• System Voltage: 11.5V - 14.8V (The code typically sets when the vehicle's main electrical system is within normal operating voltage. If system voltage is extremely low (e.g., < 10V), other unrelated electrical codes are present.)
• Time Since Engine Start: Varies (The fault is detected and the code sets very quickly after the vehicle is started (Key On, Engine Off or Running), as soon as the PCM completes its initial self-checks on the circuit.)

Related Codes

• P2068 — This is the direct opposite code: 'Fuel Level Sensor B Circuit High'. It indicates an open circuit, high resistance, or a disconnected sensor plug. If you unplug the sensor and this code appears, your wiring is intact. If P2067 remains, you have a short to ground in the harness.
• P0462 — This code is for 'Fuel Level Sensor A Circuit Low'. Seeing P0462 and P2067 together strongly indicates a problem common to both sensor circuits, such as a faulty ground connection, a power supply issue from the PCM, or a failure within the PCM itself.
• P0463 — This code is for 'Fuel Level Sensor A Circuit High'. If you have both P2067 (Sensor B Low) and P0463 (Sensor A High), it suggests two separate, simultaneous faults. This points to a complex wiring issue (e.g., wires shorted to each other) or a failing PCM.
• P0461 — This code is 'Fuel Level Sensor A Circuit Range/Performance'. It means the PCM receives a signal, but it is erratic, irrational, or not changing when it should (e.g., after refueling). This points to a worn-out sensor resistor track rather than a hard short or open.

Climate & Environmental Factors

• High Humidity & Road Salt: These are major contributors to P2067 failures. Moisture and salt dramatically accelerate corrosion on the fuel pump module connector on top of the tank and on frame-mounted components. Vehicles in the 'Salt Belt' or coastal areas are significantly more susceptible to wiring and connector-related failures for this code.
• Extreme Cold: Extreme cold exacerbates existing problems. Worn sensor contacts, marginal wiring connections, or brittle wire insulation fail when temperatures drop, as materials contract and change their electrical properties, leading to intermittent faults.
• Fuel Composition: On older vehicles, fuel blends with high sulfur content react with the fuel sender materials, causing erratic readings and triggering related codes. This highlights sensor sensitivity to its chemical environment.

How to Clear the Code After You Fix It

1. Fix the underlying electrical fault (e.g., replace sensor, repair short).
2. Use an OBD-II scan tool to clear the Diagnostic Trouble Code (DTC) from the PCM's memory.
3. Cycle the ignition off and then on; the Check Engine Light should remain off.

Drive cycle (~20 minutes): A specific drive cycle for P2067 isn't required as it is a continuous monitor. However, to reset other readiness monitors cleared at the same time for an emissions test, a general cycle is needed: 1) Cold start, idle for 5 mins. 2) Drive 10 mins in mixed city/highway conditions. 3) Perform several steady-state cruises at 55-60 mph for 5 mins. 4) Allow vehicle to cool completely.

Readiness monitors affected: Evaporative System (EVAP), Catalyst, Oxygen Sensor (O2), Oxygen Sensor Heater

Before emissions retest: drive at least 50 miles to fully set monitors.

Watch out for:

• Simply disconnecting the battery clears the code but also resets all readiness monitors, guaranteeing an emissions test failure for 'Not Ready' status.
• The code returns immediately if the root electrical fault was not properly repaired.
• Some vehicles require driving 100+ miles to set all monitors, especially the EVAP and Catalyst monitors.

Will This Fail Emissions / State Inspection?

Yes — this code typically fails an OBD-II emissions inspection.

• California: Automatic failure. An illuminated Check Engine Light results in an immediate fail. After repair, all readiness monitors must be 'Ready' (with a possible exception for the EVAP monitor on some model years) before you can pass a retest.
• New York: Automatic failure. The NYS inspection includes an OBD-II scan. Any active fault code that illuminates the Check Engine Light causes the vehicle to fail the emissions portion of the inspection.
• Texas: Automatic failure in applicable counties. In the 17 counties requiring emissions testing, an illuminated Check Engine Light is an automatic fail. After repair, you can have at most one monitor 'Not Ready' (two for vehicles model year 1996-2000) to pass.

Most Commonly Affected Vehicles

• Chevrolet Silverado, Suburban, Tahoe (2007-2013) — Extremely common due to sensor failure in the saddle-style tank. TSB #07-06-04-019 addresses erratic fuel gauge readings and recommends an updated sensor and connector harness.
• GMC Sierra, Yukon (2007-2013) — Shares the same platform and fuel system design as the Chevrolet trucks, making it equally prone to this code. The fix is identical.
• Chevrolet Corvette (2005-2013 (C6)) — Very common issue due to the dual-tank design. GM changed the sensor's resistance range mid-generation; using the wrong model year sensor causes incorrect readings even if it's new. A disconnected plug causes a P2068, not a P2067, pointing to a shorted sensor or wiring.
• Ford F-150 (2009-2014) — Often related to corrosion at the connector for the Fuel Pump Driver Module (FPDM), located on a crossmember near the spare tire. Cleaning this connector is a mandatory first step before condemning the in-tank sensor.
• Ram 1500/2500 (2011-2018) — Triggered by a faulty sensor, but also known for wiring issues where the harness rubs against the frame or bed, causing a short.
• Nissan Titan, Armada, Frontier (2004-2015) — These models are known for failures in the instrument cluster circuit board, which causes this code. If a new sensor doesn't fix the issue, the cluster is the next logical suspect.
• BMW 3-Series (F30), 5-Series (F10), X3 (F25), X5 (F15) (2011-Present) — Commonly reported by owners. The sensor is integrated with the fuel pump, and the OEM replacement part is costly ($400-$600+). Total repair at a dealer exceeds $1200. Using non-OEM parts causes compatibility issues.
• Hyundai Genesis (2009-2016) — The factory service manual specifies this code sets when the ECM detects a signal voltage below a precise threshold of 0.386V.
• Cadillac CTS (2008-2013) — Utilizes a similar saddle-tank and dual-sensor system to the C6 Corvette and is highly susceptible to the same sensor failures.

Manufacturer-Specific Notes

• General Motors (Chevrolet/GMC/Cadillac): On vehicles with saddle-tanks, the 'B' sensor is for the secondary (often driver's side) part of the tank. Failure is extremely common. Always check for TSBs, as updated sensor and harness designs are frequently released. GM has issued special coverage programs extending warranties to 10 years/120,000 miles on certain models for this issue.
• Ford: Always inspect the Fuel Pump Driver Module (FPDM) and its connector near the spare tire for corrosion before dropping the fuel tank. On older models, the Instrument Panel Cluster (IPC) itself fails and causes this code.
• BMW: In modern BMWs, the left and right fuel level sensors are integrated into their respective fuel pump/filter assemblies. A failure of one sensor requires replacing the entire expensive unit. The code appears intermittently after refueling before becoming permanent.
• Nissan/Infiniti: A well-documented issue on many models from the mid-2000s to mid-2010s is the failure of the instrument cluster itself. If replacing the fuel sending unit does not resolve the P2067 code, the cluster is the definitive next suspect.
• Diesel Vehicles (General): While P2067 almost always refers to the fuel level, on some diesel vehicles with Selective Catalytic Reduction (SCR), similar codes refer to the Diesel Exhaust Fluid (DEF) tank level sensor. Always confirm the code definition for the specific vehicle you are working on.

Real Owner Stories

2008 Corvette with 75K miles

After replacing the fuel pump due to a no-start condition, the fuel gauge read half-full after a fill-up, then dropped to zero and triggered the 'Service Fuel System' message and code P2067.

What they tried:

1. Replaced the 'B' fuel level sensor (driver's side), suspecting the new pump assembly came with a faulty sensor.
2. The problem persisted even with a new sensor.

Outcome: The issue was a short-to-ground in the wiring harness. The owner traced the circuit from the tank connector, checking resistance to ground. The fault was found in a section of wiring near the passenger-side exhaust that was disturbed during the initial fuel pump replacement.

Lesson: If a P2067 code appears immediately after a fuel tank repair, suspect an installation error like a pinched or shorted wire before condemning the new parts. The code specifically means 'Circuit Low,' which points heavily to wiring.

2014 BMW 335i (F30)

The Check Engine Light came on intermittently, usually a few days after filling the gas tank. The code was always P2067.

What they tried:

1. Clearing the code made it go away temporarily, but it always returned after the next fill-up.

Outcome: The owner replaced the standalone 'B' sensor, located on the driver's side of the saddle tank and accessible via a service cover under the rear seat. This fixed the problem permanently.

Lesson: On vehicles with saddle tanks, the 'B' sensor is often a separate, replaceable part. An intermittent code that appears after refueling is a classic sign of a failing sensor rheostat that has a dead spot at the 'full' position.

2007 Ford PowerStroke Diesel Truck

The fuel gauge suddenly dropped to empty with a 'Low Fuel' warning, despite having a 3/4 full tank. The Check Engine Light came on with a fuel level sensor code.

What they tried:

1. Clearing the code made the gauge work normally for a short time, but the problem returned.

Outcome: Following a Ford Technical Service Bulletin (TSB #19098), the owner added a bottle of Chevron Techron fuel system cleaner to the tank and switched fuel brands. The issue resolved itself after a few miles and did not return.

Lesson: Before replacing expensive hardware, check for TSBs. Sulfur or contaminants in certain fuel blends build up on the sensor's resistor card, causing erratic readings. A quality fuel system cleaner resolves the issue without mechanical repair in specific cases.

How to Prevent This Code From Triggering

• Keep the fuel tank at least 1/4 full (Always) — Fuel cools and lubricates the electric fuel pump. Consistently running the tank near empty causes the pump to overheat, shortening its life. While this doesn't prevent a sensor electrical fault, it prevents the costly secondary failure of the pump itself.
• Use a quality fuel system cleaner periodically (Every 5,000-10,000 miles) — Additives like Chevron Techron or Sea Foam clean sulfur and other deposits from the fuel level sensor's resistor card. This prevents or fixes erratic gauge behavior caused by contamination.
• Apply dielectric grease to connectors (During any fuel system or underbody repair) — Applying dielectric grease to the fuel pump/sender electrical connector seals it from moisture and oxygen, preventing the corrosion that leads to shorts and open circuits. This is critical for vehicles in high-humidity or 'Salt Belt' regions.
• Perform visual underbody inspections (Annually or during oil changes) — Periodically inspecting the wiring harness that runs to the fuel tank helps you spot signs of chafing, impact damage from road debris, or rodent damage before the wire's insulation is breached and causes a short to ground.

Frequently Asked Questions

What is the most common misdiagnosis for P2067?

The most common mistake is immediately replacing the fuel pump assembly without testing the circuit. The code means 'Circuit Low,' not 'Sensor Bad,' so a simple short to ground in the wiring causes this code just as easily. A second common error is pinching a wire during reinstallation of the tank, which creates a new short and brings the code right back.

Can I just keep driving with code P2067?

You can, but you risk running out of fuel unexpectedly. This causes the fuel pump to overheat and fail, adding hundreds or thousands of dollars to the final repair bill. Use your trip odometer to track mileage as a temporary backup.

Why is there a 'Sensor B'? Do I have two gas tanks?

You likely have one gas tank, but it has a complex shape like a saddle that goes over the driveshaft. To measure the fuel level accurately in both lobes of the tank, manufacturers use two separate sensors, labeled 'A' and 'B'.

What's the difference between P2067 and P0462?

They indicate the exact same 'Circuit Low' fault but for different sensors. P0462 refers to the primary 'Sensor A' circuit, while P2067 refers to the secondary 'Sensor B' circuit.

Could a bad gas cap cause code P2067?

No. A loose or faulty gas cap relates to the EVAP system and triggers codes like P0455 or P0457. It has no electrical connection to the fuel level sensor circuit and never causes a P2067 code.

How do you reset a fuel level sensor?

The sensor itself isn't reset; you must repair the underlying electrical fault in the sensor, wiring, or connector. Once repaired, use an OBD-II scanner to clear the diagnostic trouble code from the vehicle's computer memory. The system then functions normally.

Can a bad battery cause P2067?

While not a direct cause, a weak battery lowers the vehicle's overall system voltage, causing electronic modules to behave erratically and set spurious fault codes. If you have P2067 along with other seemingly unrelated electrical codes, test your battery and charging system.

Will replacing the fuel filter fix a P2067 code?

No, a fuel filter is unrelated to the fuel level sending unit. This code is purely electrical and relates to the sensor that measures the fuel level, not the flow or cleanliness of the fuel.

Key Takeaways

• Code P2067 indicates the secondary fuel level sensor ('B') is sending a voltage signal below 0.2V to the computer, resulting in an erratic or dead fuel gauge.
• A failed fuel level sensor integrated into the fuel pump module causes 70% of P2067 codes, but you must rule out a wiring short-to-ground before spending $600+ on parts.
• Driving with P2067 is possible, but repeatedly running the tank dry starves the fuel pump of its liquid coolant, triggering a catastrophic pump failure that costs upwards of $1,000 to fix.
• Diagnose the circuit by unplugging the sensor; if the code flips to P2068 (Circuit High), the wiring is intact and the sensor itself requires replacement.
• Vehicles with saddle-style fuel tanks, including 2007-2013 GM trucks and modern BMWs, experience this failure frequently due to their complex dual-sensor design.