OBD-II Code P2107: Throttle Actuator Control Module Processor Failure

Can I Drive With P2107?

No — Do Not Drive. Do not drive. The P2107 code triggers a failsafe 'limp mode' that severely restricts engine power, limits RPMs to 2000, and caps vehicle speed to 25-40 mph. This makes merging and maintaining traffic speed highly dangerous. Sudden loss of throttle control occurs without warning. Arrange for a tow to an immediate repair facility.

Common Causes

• Faulty Electronic Throttle Body Assembly (Very Common) — The leading cause. The internal processor of the integrated Throttle Actuator Control (TAC) module fails. Worn actuator motors or failing built-in throttle position sensors (TPS) also force the processor to report a fatal fault.
• Low or Unstable System Voltage (Common) — A weak battery, failing alternator, or poor ground connections cause voltage drops during engine cranking. These 'brownouts' disrupt the sensitive electronics within the TAC module, causing its processor to fail a self-test and flag a false P2107 code.
• Damaged Wiring or Poor Electrical Connections (Common) — Frayed, corroded, or shorted wires in the harness leading to the throttle body interrupt critical signals. A loose connector or water-damaged pins cause intermittent voltage drops, confusing the processor.
• Dirty or Sticking Throttle Plate (Common) — Heavy carbon buildup causes the throttle plate to bind. When the TAC module commands a position and the plate fails to reach it due to physical resistance, the module incorrectly interprets this as an internal processor fault.
• Faulty Accelerator Pedal Position (APP) Sensor (Less Common) — The APP sensor sends throttle input to the PCM. If it provides erratic voltage signals, the PCM cannot reconcile the requested throttle position with the actual position, sometimes blaming the TAC module's processor.
• Electromagnetic or Radio Frequency Interference (RFI) (Less Common) — On certain vehicles (particularly Fords), failing ignition coils or non-resistor spark plugs emit strong electrical noise. This RFI disrupts sensitive signals between the PCM and the throttle body, setting a processor fault code.
• Faulty Powertrain Control Module (PCM) (Rare) — An internal PCM fault or software glitch causes it to misinterpret valid signals from the throttle body and incorrectly set a P2107 code. This is a last resort after exhausting all other possibilities.

Symptoms

• Reduced Engine Power ('Limp Mode') — The vehicle has severely limited acceleration and a restricted top speed (25-40 mph), accompanied by a warning message on the dash.
• No or Delayed Throttle Response — Pressing the accelerator pedal results in no RPM increase, or a severely delayed response. The pedal feels completely dead.
• Check Engine Light and/or Wrench Light On — The Check Engine Light illuminates immediately. Many vehicles also trigger a separate Electronic Throttle Control (ETC) warning light (a wrench or a lightning bolt).
• Engine Stalling or Rough Idle — The engine stalls unexpectedly when coming to a stop, or idles erratically with RPMs surging up and down.
• Engine Will Not Start — The fault is detected during the initial key-on self-test, and the PCM prevents the engine from starting as a safety precaution.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this code.

Common Fixes & Costs

• Replacing the Electronic Throttle Body Assembly — Parts: $200-$550, Labor: $130-$250, ~1.2 hr book time (Intermediate)
  Ford F-150 (2015-2017, 5.0L): OEM BR3Z-9E926-C (Alt: Dorman 977-593, BBK 1807, Bosch 0280750563)
  Chevrolet Malibu (2016-2022, 1.5L): OEM 12671379 (Alt: Dorman 977-105, Standard Motor Products S20417)
  Nissan Altima (2013-2018, 2.5L): OEM 16119-3TA0A (Alt: Hitachi ETB0004, A-Premium APTHB145, Dorman 977-325)
• Replacing the Battery — Parts: $150-$350, Labor: $30-$75, ~0.4 hr book time (DIY)
• Repairing Damaged Wiring or Connector — Parts: $20-$100, Labor: $150-$400, ~2 hr book time (Intermediate)
• Cleaning the Throttle Body — Parts: $10-$20, Labor: $75-$150, ~1 hr book time (DIY)
• Replacing the Accelerator Pedal Position Sensor — Parts: $70-$250, Labor: $50-$100, ~0.8 hr book time (DIY)
  Ford F-150 (2015-2017): OEM FL3Z-9F836-C (Alt: Dorman 699-206, Standard Motor Products APS1060)
  Chevrolet Malibu (2016-2022): OEM 13589101 (Alt: Dorman 699-120, Walker 200-1178)
  Nissan Altima (2013-2018): OEM 18919-3TA0A (Alt: NTK APA1019, Walker 201-2357)

Used vs. New Parts: Buying Guide

When a used part is worth it: For an older vehicle (>150k miles) where budget is the primary concern, a used OEM throttle body from a reputable salvage yard is a cost-effective option. This is often a better choice than a cheap, unbranded aftermarket part with questionable electronics.

Donor-vehicle mileage cap: roughly under 80000 miles for the part to have meaningful remaining life.

Donor quality checklist:

• Verify the donor vehicle was not scrapped due to engine or electrical failure.
• Inspect the connector pins for any signs of green corrosion or heat damage.
• Match the OEM part number exactly; slight variations cause software incompatibility.

Decision logic:

• If Vehicle is newer or has low mileage (<80k miles) → Buy a new OEM or high-quality aftermarket part (e.g., Bosch, Hitachi, Dorman) to ensure longevity and access to the latest design revisions.
• If Vehicle is older (>150k miles) and you plan to sell it soon → A tested, low-mileage used OEM part is an acceptable risk to save on repair costs.
• If The specific part has a known high failure rate (e.g., early 2000s Fords) → Favor a new part, as a used one likely has the same inherent design flaw.

Warranty tradeoff: Used salvage parts offer a 30-90 day functional warranty. Aftermarket new parts include a 1-year to limited lifetime warranty. New OEM parts carry a 1-2 year warranty but require dealer installation to validate.

Worst-case if a used part fails: $300-700 if a used part fails shortly after the warranty period, requiring a second replacement part and repeat labor costs.

What Happens If You Wait — Timeline

1. Immediate (First Occurrence): The PCM detects the processor fault, illuminates the Check Engine Light, and immediately forces the engine into 'limp mode.' Throttle response is gone, and speed is limited to 25-40 mph. (MPG impact: 15-25%% · Added cost: $0)
2. 0-1 Month (If driving is attempted): Driving in limp mode is unsafe. If the root cause is a weak battery, continued cranking attempts and low voltage stress other vehicle electronics like the main PCM or transmission control module. (MPG impact: 15-25% (while in limp mode)% · Added cost: $50-$150 in wasted fuel and potential tow bills. Risk of damage to other modules.)
3. 1-3 Months (If underlying fault is ignored): If the fault is intermittent, persistent low voltage corrupts learned data in modules. A sticking throttle causes rich/lean conditions that begin to stress the catalytic converter. (MPG impact: 5-10% (during periods of normal operation)% · Added cost: $200-$500 (Potential damage to battery from deep cycling, early-stage catalytic converter stress))
4. 3+ Months (If underlying fault is ignored): Continued operation with poor air/fuel mixture leads to overheating and eventual failure of the catalytic converter. A failing battery/alternator causes cascading electronic failures. (MPG impact: 10-20% (during periods of normal operation)% · Added cost: $1200-2800+ (Cost to replace a damaged catalytic converter, plus the original repair cost))

Cost of Not Fixing It

• 0-1 month: Vehicle remains stuck in 'limp mode,' making it unsafe to drive. Repeated low-voltage cranking attempts stress the main PCM and transmission control module. (Added cost: $50-$150 in wasted fuel and potential tow bills.)
• 1-6 months: Running with an incorrect throttle position forces a rich or lean air-fuel mixture, which overheats and damages the catalytic converter substrate. (Added cost: $1200-2800)
• 6+ months: A failed, clogged catalytic converter creates excessive engine backpressure, leading to burnt exhaust valves and severe internal engine damage. (Added cost: $3000-7000+)

Diagnosis Steps

1. Scan for All DTCs and Review Freeze Frame Data
   Use an advanced OBD-II scanner to read all codes. P2107 is rarely standalone. Companion codes like P2110, P2135, or U-codes are vital clues. Analyze freeze frame data to see the exact conditions (engine speed, temperature, load) when the code set.
   Tools: Advanced OBD-II Scanner (Beginner)
2. PRO TIP: Perform a Cranking Voltage Drop Test
   Connect a multimeter to the battery terminals. A healthy battery reads ~12.6V with the engine off. Have a helper crank the engine. Voltage must NOT drop below 10.0V. A drop below this threshold causes a 'brownout' in sensitive modules, triggering a false processor fault.
   Tools: Multimeter (Intermediate)
3. Perform a Comprehensive Visual Inspection
   Inspect the wiring harness to the throttle body for chafing, melting, or corrosion. Unplug the connector and meticulously inspect for bent, pushed-out, or water-damaged pins. Tug gently on the wires to ensure they are secure.
   Tools: Flashlight, Inspection Mirror (Beginner)
4. Monitor Live Data PIDs for Commanded vs. Actual Position
   Monitor 'Commanded Throttle Actuator Control (TAC)' and 'Throttle Position (TP)' PIDs. With key on, engine off, slowly press the accelerator. The commanded and actual percentages must track closely. A significant lag points to a binding throttle plate or failing motor.
   Tools: Advanced OBD-II Scanner (Advanced)
5. Inspect and Clean the Throttle Body Bore and Plate
   Remove the intake boot. Significant carbon buildup around the throttle plate causes binding. Clean it using throttle body cleaner and a soft brush. Do NOT push the plate open manually; have a helper turn the key to 'ON' (engine off) and press the gas pedal to open the plate.
   Tools: Screwdriver/Ratchet, Throttle Body Cleaner, Rags (Intermediate)
6. PRO TIP: Test Throttle Body Power and Ground Circuits
   Identify the power and ground pins on the throttle body connector. With key on, engine off, verify a 5V reference signal and a solid ground (<0.1V or <5 ohms resistance to chassis ground). A missing reference voltage or poor ground points to a wiring or PCM issue.
   Tools: Multimeter, Wiring Diagram (Advanced)
7. Test the Accelerator Pedal Position (APP) Sensor with Live Data
   Monitor the APP sensor signals (APP1 and APP2). As you slowly press and release the pedal, both signals must change smoothly with no dropouts. They are typically inverse (one sweeps 0.5V to 4.5V, the other 4.5V to 0.5V). Erratic behavior indicates a faulty APP sensor.
   Tools: Advanced OBD-II Scanner (Intermediate)
8. Isolate and Test the Throttle Actuator Motor
   With key on, engine off, listen for a faint buzzing from the throttle body (normal). Feel the motor housing; excessive heat indicates an internal short. Check resistance between the two motor control pins. A typical reading is 1.5 to 5.0 ohms. Infinite resistance indicates a failed motor.
   Tools: Multimeter, Wiring Diagram (Advanced)
9. PRO TIP: Scope the Throttle Position Sensor (TPS) Signals
   Use a dual-channel oscilloscope to graph the two internal TPS signals. Back-probe the signal wires. As you operate the throttle, the waveforms must be clean, mirror images with no dropouts. Any glitch indicates a failing TPS inside the throttle body assembly.
   Tools: Automotive Oscilloscope, Wiring Diagram (Advanced)

When This Code Triggers (Freeze-Frame Conditions)

• Engine Coolant Temp: 175-210°F (Engine at full operating temperature.)
• RPM: 700-2500 (Fault logs at idle or during steady-state cruise.)
• Engine Load: 15-40% (Low to moderate load; rarely occurs during heavy acceleration.)
• Vehicle Speed: 0 mph or 40-65 mph (Occurs during the key-on self-test before starting, or during highway driving.)

Related Codes

• P2110 — 'Throttle Actuator Control System - Forced Limited RPM' is a direct companion. P2107 identifies the processor fault, and P2110 confirms the PCM enforced 'limp mode'.
• P2135 — 'Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation'. The two internal throttle position sensors disagree. Diagnose P2135 first, as nonsensical sensor data makes the processor appear faulty.
• P2108 — 'Throttle Actuator Control Module Performance'. A general performance fault, whereas P2107 indicates the module's internal brain failed its self-test (a more severe electronic fault).
• P0606 — 'PCM Processor Fault'. A serious code indicating a fault with the main computer's central processor. Seeing P0606 alongside P2107 strongly suggests the PCM itself is the root cause.

Climate & Environmental Factors

• Low Temperatures: Cold weather reduces a battery's cranking amperage. A weak battery drops system voltage below 10.0V during a cold start, triggering an erroneous P2107 code during the startup self-test.
• High Humidity / Water Exposure: Humid climates and heavy road salt usage accelerate corrosion on throttle body connector pins. Moisture intrusion causes short circuits or high resistance, leading to signal faults interpreted as a processor failure.

How to Talk to a Mechanic About This Code

Say this: "I have a P2107 code and the car is in limp mode. I'd like to schedule a diagnostic. Before replacing the throttle body, please perform a cranking voltage test, check for 5V reference and ground at the connector, and inspect the wiring harness for damage."

This signals that you know the common causes of a P2107 are not just a bad throttle body. It directs the mechanic to perform a thorough diagnosis to rule out cheaper fixes (like a bad battery or wiring) before quoting an expensive part replacement.

Avoid saying:

• Just replace the throttle body.
• My check engine light is on, can you look at it?
• The car is acting weird, I think it's the gas pedal.

Questions to ask before authorizing the repair:

• What was the battery voltage during cranking?
• Did you find a stable 5-volt reference and a good ground at the throttle body connector?
• Did you inspect the wiring harness for any chafing or corrosion?
• If the throttle body is the problem, does the new part price include the mandatory relearn procedure?
• What is the warranty on the part and your labor?

Where to Take It: Dealer vs Independent vs Chain

• Dealer: Take the vehicle to a dealer if it is under warranty or a brand known for difficult relearn procedures.
  Best for: Vehicles still under powertrain warranty., Vehicles with known TSBs or Special Coverage Adjustments (e.g., certain GM models)., Brands with complex, tool-intensive relearn procedures (e.g., Nissan, Volkswagen) where generic tools fail.
  Downsides: Highest labor rates., Defaults to replacing the expensive throttle body assembly without investigating cheaper electrical causes. (Typical cost: +50% vs. baseline)
• Independent Shop: Best fit for most situations, provided you choose a reputable shop that performs a full electrical diagnosis before replacing parts.
  Best for: Most out-of-warranty vehicles., Shops with ASE-certified technicians specializing in electrical diagnostics.
  Downsides: Quality and diagnostic capabilities vary greatly., Lacks the latest manufacturer-specific scan tools for complex relearn procedures. (Typical cost: +0% vs. baseline)
• Chain Shop: AVOID for initial diagnosis. High risk of misdiagnosis. Only use if you have already confirmed the battery is the sole issue.
  Best for: Simple, clear-cut fixes like a battery replacement if a low-voltage condition is confirmed.
  Downsides: Lacks advanced diagnostic tools and experience for complex electronic faults., High pressure to sell parts leads to replacing the throttle body without proper diagnosis. (Typical cost: -10% vs. baseline)

When to Walk Away From the Repair

If the total estimated repair cost for the P2107 code exceeds 40-50% of your car's private-party value, sell or trade it in.

• Car worth $4000, fix is $900: Fix it. The repair cost is ~23% of the car's value, which is well below the threshold.
• Car worth $3000, fix is $1500: Walk away. The repair cost is 50% of the car's value. It's not worth investing that much into an older vehicle.
• Car worth $15000, fix is $1200: Fix it. The repair is only 8% of the vehicle's value.

What Scan Tool You Need for This Code

Minimum: A bidirectional scanner that reads live data PIDs for throttle and accelerator pedal position, battery voltage, and performs throttle relearns.

A basic $20 code reader only shows the P2107 code. It cannot show the live data needed to diagnose the problem, nor can it perform the mandatory throttle relearn procedure after replacing the part.

Budget: BlueDriver Pro (~$99) — Connects to your phone via Bluetooth and provides a great interface for viewing live data, including graphing pedal and throttle sensor voltages. It reads freeze frame data but cannot perform relearns.

Mid-range: Foxwell NT510 Elite (~$180) — A powerful handheld unit offering bidirectional control. It commands the throttle body to open and close, and performs the electronic throttle relearn procedure required on many vehicles.

Professional: Autel MaxiCOM MK808 / XTOOL D7 (~$450-550) — Full-featured tablets providing OE-level diagnostics. They offer robust bidirectional controls, advanced data graphing, and a comprehensive database to perform the throttle relearn procedure on virtually any make and model.

Rent vs buy: Auto parts stores scan for free to confirm the code, but they do not provide live data or bidirectional tools. If your repair requires a throttle relearn, you must buy a bidirectional scanner like the Foxwell or Autel.

How to Clear the Code After You Fix It

1. Reconnect battery if disconnected.
2. Use a bidirectional OBD-II scan tool to clear all diagnostic trouble codes.
3. Perform the vehicle-specific electronic throttle relearn procedure.
4. Complete a full OBD-II drive cycle to run readiness monitors.

Drive cycle (~30 minutes): From a cold start, idle for 3 minutes. Drive for 20 minutes with mixed stop-and-go city traffic and steady highway cruise at 55 mph for 5 minutes. Allow the vehicle to cool completely and repeat if necessary.

Readiness monitors affected: Catalyst Monitor, Evaporative System Monitor, Oxygen (O2) Sensor Monitor, Comprehensive Component Monitor

Before emissions retest: drive at least 100 miles to fully set monitors.

Watch out for:

• Disconnecting the battery clears the code but resets all readiness monitors, causing an immediate emissions test failure.
• The code returns immediately if the root cause (e.g., bad wiring, weak battery) is not repaired.
• Skipping the mandatory throttle relearn procedure after replacement causes erratic idle and stalling.

Will This Fail Emissions / State Inspection?

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

• California: An active P2107 code causes an automatic smog check failure. After repair, a full drive cycle must be completed to set all required readiness monitors before a re-test.
• New York: The NYS DMV inspection includes an OBD-II scan. The presence of a Check Engine Light and this DTC fails the emissions portion of the inspection.
• Texas: In counties requiring emissions testing, the OBD-II check is part of the annual safety inspection. A P2107 code prevents the vehicle from passing.

Most Commonly Affected Vehicles

• Ford F-150, Escape, Fusion, Freestyle (2004-2018) — A very common issue. Early models have known TPS sensor problems. RFI from failing ignition coils is a known cause. Always check for the latest generation TPS part number.
• Chevrolet / GM Malibu, Equinox, Cobalt, HHR (2008-2022) — GM issued Special Coverage Adjustment #14329 for throttle body issues on 2008-2012 models. Corroded wiring at the throttle body connector is a frequent culprit.
• Nissan Altima, Sentra, Versa, Rogue (2007-2019) — Often caused by a failed throttle body assembly. Performing the 'Idle Air Volume Learning' procedure is mandatory after replacement to prevent high idle.
• Hyundai / Kia Elantra, Sonata, Accent / Optima, Forte (2011-2022) — Widespread throttle body assembly issues. A class-action lawsuit settlement extends warranty coverage for this component on certain models.
• Volkswagen / Audi Jetta, Passat, Golf / A4 (2005-2023) — The Electronic Power Control (EPC) light is the first warning. Failures are typically due to internal electronics in the throttle body.
• Subaru Forester, Outback, Impreza, Legacy (2005-2014) — Symptoms appear intermittently at first, with the car going into limp mode, becoming more frequent over time until a hard fault sets.
• Toyota RAV4, Camry, Corolla (especially Hybrids) (2019-2024) — On hybrid models, this code traces back to a weak 12-volt auxiliary battery disrupting the startup self-test. Always test the 12V battery first.
• Dodge / Chrysler / Jeep Charger, Grand Caravan, Grand Cherokee (2007-2020) — Identified by an illuminated Electronic Throttle Control (lightning bolt) warning light. The issue is typically an internal electronic failure.

Manufacturer-Specific Notes

• Ford: On 2003-2006 Ford vehicles, a TSB exists for RFI from failing ignition coils causing P2107. Perform a coil stress test or observe live misfire data before replacing the throttle body.
• General Motors (Chevrolet, GMC): GM issued Special Coverage Adjustments (e.g., #14329) for failing throttle bodies. Owners of affected vehicles are eligible for a free replacement outside the standard warranty period.
• Nissan: The 'Idle Air Volume Learning' procedure is mandatory after replacing the throttle body. Skipping this multi-step manual process or scan tool command guarantees an unstable idle.
• Hyundai / Kia: A class-action lawsuit regarding defective electronic throttle bodies led to a settlement extending the warranty for this component. Contact a dealer to inquire about coverage.

Real Owner Stories

2004 Ford F-150 with 104K miles

Car intermittently entered limp mode with wrench light in hot weather. Codes P2107 and P2110 present. Restarting temporarily resolved the issue.

What they tried:

1. First shop cleaned the throttle body; problem returned.
2. Dealer replaced the throttle position sensor; problem returned.
3. Third shop replaced all ignition coils and spark plugs for $1000; problem returned.

Outcome: A fourth shop suggested the throttle body assembly was the final culprit. The owner was hesitant due to the $1400 quote and history of misdiagnosis.

Lesson: With intermittent heat-related electronic issues, part-swapping becomes expensive. Methodical diagnosis of wiring and connectors must precede replacing high-cost components.

2007 Ford F-150 4.6L V8

Vehicle lost all acceleration while parking. Check Engine and wrench lights came on. Codes P2104, P2107, P2110. Pedal became completely unresponsive.

What they tried:

1. Replaced the entire throttle body assembly.
2. Performed a manual throttle relearn procedure.

Outcome: The problem persisted. The same codes returned, and the throttle remained unresponsive, suggesting the relearn was unsuccessful or the root cause was elsewhere.

Lesson: Even when the most common fix is performed, the issue persists if the relearn procedure fails or secondary causes (like the APP sensor or wiring) are ignored.

2020 Toyota RAV4 Hybrid

Vehicle intermittently displayed P2107 and entered limp mode during startup.

What they tried:

1. Initial diagnosis focused on the throttle body itself, with a potential replacement quoted.

Outcome: A technician tested the 12-volt auxiliary battery, which failed a load test. After replacing the 12V battery, the P2107 code cleared and did not return.

Lesson: On hybrids and modern vehicles, a weak 12V battery causes low-voltage 'brownouts' during self-tests, triggering processor fault codes. Always perform a cranking voltage drop test first.

2005 Ford Freestyle with P2107

Check engine light on with code P2107.

What they tried:

1. Technician followed a systematic diagnostic process instead of replacing parts.

Outcome: The technician found a poor electrical connection at the throttle body harness. After cleaning the connector pins and ensuring a secure fit, the code cleared.

Lesson: The most expensive mistake is replacing the throttle body without inspecting the wiring harness. Corrosion, pushed-out pins, or frayed wires are frequent, low-cost culprits.

How to Prevent This Code From Triggering

• Clean the throttle body periodically (Every 30,000-60,000 miles) — Removes carbon buildup that causes the throttle plate to stick. Physical resistance is misinterpreted by the module as an internal motor or processor fault.
• Test battery health annually (Once per year, especially before winter) — A weak battery is a primary cause of erroneous P2107 codes. Low voltage during engine cranking causes a 'brownout' in the sensitive throttle control processor.
• Apply dielectric grease to the throttle body connector (Whenever the connector is unplugged for service) — Seals the connector from moisture and road salt, preventing pin corrosion that leads to high resistance and intermittent signal faults.
• Inspect wiring harnesses for security and condition (During regular oil changes) — Ensures the wiring harness is not rubbing against hot engine components. Catching chafed insulation early prevents shorts or open circuits.

Frequently Asked Questions

Is it safe to drive my car with a P2107 code?

No. The vehicle enters 'limp mode' with severely reduced power, making it a hazard in traffic. Sudden complete throttle failure is highly likely. Tow the vehicle for repair.

What is the most common mistake when diagnosing P2107?

The most costly mistake is immediately replacing the throttle body without testing the electrical system. Technicians frequently find the true cause is a corroded ground wire, a weak battery, or a damaged connector pin.

Can I just clean the throttle body to fix P2107?

Unlikely, but possible. If heavy carbon buildup physically prevents the motor from moving, cleaning solves it. However, P2107 specifically points to an electronic processor fault, which cleaning cannot fix.

How much does it cost to fix a P2107 code?

Costs range from $150 for a DIY battery replacement to over $1,000 at a dealership for an OEM throttle body on a luxury car. A typical independent shop repair involving throttle body replacement runs $400 to $900, including parts, labor, and the required relearn procedure.

Does a new throttle body need to be programmed?

Yes, almost always. This 'relearn' or 'calibration' allows the PCM to learn the exact closed, open, and resting positions of the new throttle plate. Failure to perform this mandatory procedure results in idling problems and the immediate return of the code.

Can a bad battery cause a P2107 code?

Absolutely. A battery providing low voltage (especially below 10V during cranking) causes the sensitive processor in the throttle control module to glitch and fail its startup self-test. This logs a P2107 code even though the throttle body itself is perfectly fine.

What's the difference between P2107 and P2112 (Stuck Closed)?

P2107 is an electronic processor fault indicating the module's internal 'brain' has failed. P2112 is a mechanical fault indicating the PCM commanded the throttle to open, but the position sensors report it is stuck closed. P2112 points to a physical obstruction, while P2107 points to an electronic failure.

Key Takeaways

• P2107 indicates a fatal processor failure inside the Throttle Actuator Control (TAC) module, immediately forcing the vehicle into a 25-40 mph 'limp mode'.
• Do not drive with an active P2107; the sudden loss of throttle response and 2000 RPM limit makes merging and maintaining traffic speeds highly dangerous.
• Before spending $400+ on a new throttle body, perform a cranking voltage drop test to ensure the battery stays above 10.0V, as low voltage frequently triggers false processor faults.
• Replacing the throttle body requires a mandatory electronic 'throttle relearn' procedure using a bidirectional scan tool to prevent erratic idling and immediate code return.