OBD-II Code P0867: Transmission Fluid Pressure

What Does P0867 Mean?

The Transmission Control Module (TCM) detects a significant mismatch between the actual transmission fluid pressure and the expected pressure required for smooth operation. This discrepancy causes severe shifting issues and internal damage.

Technical definition: The Society of Automotive Engineers (SAE) defines P0867 as Transmission Fluid Pressure. The TCM sets this code when actual line pressure deviates from desired line pressure by a specific threshold, typically 10 PSI or more. In modern CVTs/IVTs, it triggers when secondary pulley pressure misses targets by 7 bar or more.

Can I Drive With P0867?

No — Do Not Drive. Do not drive. Incorrect fluid pressure starves components of lubrication and cooling, causing rapid internal damage. Slipping clutches generate extreme heat, burning fluid and destroying seals. Ignoring this code quickly turns a $400 sensor repair into a $4,000+ transmission replacement.

Common Causes

• Low or Dirty Transmission Fluid (Very Common) — The most frequent cause. Fluid leaks or degraded, contaminated fluid loses hydraulic properties and cannot maintain proper pressure.
• Faulty Transmission Fluid Pressure (TFP) Sensor (Common) — The sensor measuring fluid pressure fails, sending erratic readings to the TCM.
• Faulty TCM Software (Common) — Software glitches trigger this code on modern vehicles (especially Hyundai/Kia and Subaru). A dealer software update is the mandated first step in several TSBs.
• Clogged Transmission Filter (Common) — A clogged filter restricts fluid flow, causing a pressure drop. Incorrect aftermarket filters with poor flow characteristics also trigger this code.
• Failing Transmission Oil Pump or Valve Body (Less Common) — Internal transmission failures, such as a weak pump or a valve body with sticking solenoids, prevent the system from generating or regulating pressure.
• Damaged Wiring or Connectors (Less Common) — Corroded, frayed, or shorted wires to the pressure sensor or solenoid pack corrupt the signal.
• Internal Hydraulic Leak (Rare) — Worn internal seals, gaskets, or clutch pack pistons cause massive hydraulic pressure loss within the transmission circuit.
• Internal Mechatronic Unit Fault (Rare) — On advanced transmissions like VW/Audi's DQ400E, this code points to an internal failure of the mechatronic unit housing the TCM, sensors, and actuators.
• Improper RTV/Sealant Application (Rare) — Excessive RTV sealant from recent pan services breaks off internally, clogging the filter, pickup tube, or valve body passages.

Symptoms

• Check Engine Light On — The Malfunction Indicator Lamp (MIL) illuminates. Subaru models may also flash the 'AT OIL TEMP' light.
• Harsh, Delayed, or Slipping Shifts — The transmission bangs into gear, hesitates, or slips between gears as clutches fail to engage.
• Transmission Stuck in 'Limp Mode' — The vehicle locks into a single gear (often 2nd or 3rd) to prevent further internal damage.
• Transmission Overheating — Incorrect pressure causes extreme friction, triggering a transmission temperature warning light or a burnt fluid smell.
• Increased Fuel Consumption — Inefficient shifting and torque converter lockup failures force the engine to work harder, burning more fuel.
• Whining or Grinding Noises — A failing transmission pump or fluid starvation causes audible whining or groaning during shifts.

Diagnostic Flowchart

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

Common Fixes & Costs

• TCM Software Update — Parts: $0, Labor: $100-$200, ~1 hr book time (Professional)
• Transmission Fluid and Filter Change — Parts: $50-$150, Labor: $100-$250, ~1.5 hr book time (Intermediate)
• Replace Transmission Fluid Pressure (TFP) Sensor/Switch — Parts: $40-$200, Labor: $200-$700, ~2.5 hr book time (Intermediate)
• Replace Pressure Control Solenoid/Pack — Parts: $150-$500, Labor: $250-$600, ~3 hr book time (Professional)
• Replace Transmission Control Module (TCM) — Parts: $200-$800, Labor: $150-$400, ~2 hr book time (Professional)
• Transmission Rebuild or Replacement — Parts: $2500-$7000, Labor: $1500-$2500, ~8 hr book time (Professional)

DIY vs Professional

• Transmission Fluid and Filter Change — Beginner:
• TCM Software Update — Beginner:
• Replace Transmission Fluid Pressure (TFP) Sensor/Solenoid Pack — Beginner:

Used vs. New Parts: Buying Guide

When a used part is worth it: Buying used is not recommended for sensors or solenoid packs due to high failure rates and labor costs. Used parts make sense only when sourcing a complete, low-mileage transmission assembly as a last resort.

Donor-vehicle mileage cap: roughly under 60000 miles for the part to have meaningful remaining life.

Donor quality checklist:

• Verify the donor vehicle was not scrapped due to transmission failure.
• Match part numbers exactly; electronic components are rarely interchangeable.
• Ensure connectors are not corroded or damaged.

Decision logic:

• If The part is a sensor, switch, or solenoid pack located inside the transmission pan → Buy new OEM or high-quality aftermarket. The labor cost to replace it is too high to risk a used part failing.
• If The vehicle is older (>10 years) and requires a complete transmission replacement → A low-mileage used transmission from a verified source is a cost-effective alternative to a new unit.
• If The part is a TCM or other external electronic module → Used is an option, but it requires dealer programming to work with your vehicle.

Warranty tradeoff: Used parts typically have a 30-90 day warranty covering only the part. New aftermarket parts offer 1-year to lifetime warranties. New OEM parts carry a 12-month/12,000-mile warranty.

Worst-case if a used part fails: $500-$1200 if a used internal part fails, covering repeat labor to drop the pan and the cost of a new part.

What Happens If You Wait — Timeline

1. 0-2 weeks: Code P0867 sets, MIL turns on. Symptoms are subtle or non-existent. The vehicle occasionally enters 'limp mode'. (MPG impact: 0-5%% · Added cost: $0)
2. 2 weeks - 2 months: Transmission slips noticeably. Harsh or delayed gear engagement becomes frequent. Fluid overheats, turning dark and smelling burnt. (MPG impact: 5-15%% · Added cost: $50-$200 in wasted fuel. Accelerated wear on valve body solenoids begins.)
3. 2-4 months: Sustained low pressure burns internal clutch packs. Friction material wears away, generating metal shavings that contaminate the valve body and torque converter. (MPG impact: 15-25%% · Added cost: $1,500 - $3,000. The transmission requires a new set of clutches and a valve body. A simple sensor fix is no longer viable.)
4. 4+ months: Catastrophic failure. Clutches burn out completely. The transmission pump seizes. The vehicle stops moving entirely. (MPG impact: >25%% · Added cost: $4,000 - $8,000+. The only repair is a complete transmission replacement.)

Cost of Not Fixing It

• 0-1 month: Noticeable decline in shift quality, transmission slipping, and a 5-15% drop in fuel economy. The vehicle enters 'limp mode' intermittently. (Added cost: Negligible, but drivability is compromised.)
• 1-3 months: Driving with low pressure causes accelerated wear on clutches and bands. Fluid overheats and degrades, leading to warped internal components and seal damage. (Added cost: $1500 - $3500 for a valve body or solenoid pack replacement.)
• 3+ months: Catastrophic transmission failure. Clutches burn out, the pump fails, and metal debris contaminates the entire hydraulic system. (Added cost: $4000 - $8000+ for a complete transmission rebuild or replacement.)

Diagnosis Steps

1. Check for Technical Service Bulletins (TSBs)
   Check for TSBs for your specific year, make, and model. Manufacturers like Hyundai, Subaru, and Nissan issue software updates or specific repair procedures for P0867 that save significant time and prevent misdiagnosis.
   Tools: Internet access, vehicle VIN (Beginner)
2. Check Transmission Fluid Level and Condition
   With the engine warm and running, check the transmission fluid. It must be at the 'FULL' mark, pink/red, and not smell burnt. Low, dark, or burnt fluid indicates a leak or internal damage. Sealed transmissions require a special procedure or dipstick tool.
   Tools: Rag, special dipstick tool for sealed transmissions (Beginner)
3. Scan for Codes and Review Live Data PIDs
   Use an OBD-II scanner to confirm P0867 and check for related codes like P0868 (Low) or P0869 (High). Monitor live data PIDs for 'Desired Transmission Fluid Pressure' vs. 'Actual Transmission Fluid Pressure'. A deviation greater than 10 PSI confirms the fault condition.
   Tools: Advanced OBD-II Scanner with Live Data (Intermediate)
4. Perform a Mechanical Pressure Test
   Connect a mechanical pressure gauge to the transmission's line pressure test port and compare readings to manufacturer specifications. If the gauge reads normal but the scanner reads low, the sensor or wiring is faulty. If the mechanical pressure is out of spec, the problem is internal.
   Tools: Transmission pressure gauge set, service manual (Professional)
5. Inspect Wiring and Connectors
   Visually inspect the wiring harness to the transmission fluid pressure sensor and TCM. Look for damage, corrosion, loose connections, or rodent activity. The sensor is usually on the valve body, requiring pan removal to access.
   Tools: Flashlight, safety glasses (Intermediate)
6. Test the Pressure Sensor Circuit (Voltage)
   Back-probe the TFP sensor connector with a multimeter. Verify the 5-volt reference and ground. Measure the signal wire voltage, which must change smoothly with engine RPM. A fixed or out-of-range voltage (e.g., ≤ 0.27V or ≥ 4.50V on a Hyundai IVT) indicates a sensor fault.
   Tools: Digital Multimeter (DVOM), back-probe kit, wiring diagram (Advanced)
7. Test Sensor and Solenoid Circuit (Resistance)
   Measure the resistance (Ohms) of the disconnected pressure sensor and pressure control solenoid. Compare readings to the service manual. Infinite resistance (open) or zero resistance (short) indicates a failed component.
   Tools: Digital Multimeter (DVOM), wiring diagram, service manual (Advanced)
8. Analyze Sensor and Solenoid Waveforms (Scope Test)
   Graph the TFP sensor signal against the pressure control solenoid command signal using an oscilloscope. A healthy sensor signal mirrors solenoid commands smoothly. A delayed or noisy pattern indicates a failing sensor or circuit under load.
   Tools: Automotive Oscilloscope (Scope), wiring diagram (Advanced)
9. Check for Internal Blockages
   If mechanical pressure is low but the pump is good, drop the transmission pan. Inspect the filter for excessive debris or sludge. Check the fluid pickup for blockages or stray RTV sealant obstructing passages.
   Tools: Socket set, drain pan, torque wrench (Professional)

When This Code Triggers (Freeze-Frame Conditions)

• Engine Coolant Temp: 180-210°F (The fault sets when the vehicle is fully warmed up and running at operating temperature.)
• Engine RPM: 1500-3000 RPM (The code triggers under steady-state cruising or light acceleration, rarely at idle.)
• Vehicle Speed: 40-65 mph (P0867 sets at highway or city cruising speeds, where the transmission expects steady pressure.)
• Transmission Fluid Temperature: 175-220°F (Appears when fluid is at full operating temperature, as viscosity and pressure characteristics change with heat.)

Related Codes

• P0868 — Indicates 'Transmission Fluid Pressure Low'. If you have both P0867 and P0868, focus entirely on causes of low pressure: leaks, clogged filters, weak pumps, or a sensor reading low. P0867 is the general alarm; P0868 is the specific reason.
• P0869 — Indicates 'Transmission Fluid Pressure High'. Look for blockages in hydraulic passages, a sticking pressure control solenoid, or a sensor reading artificially high. A mechanical pressure gauge differentiates between real overpressure and a sensor fault.
• P0700 — A general 'Transmission Control System Malfunction' code. It is a flag set by the TCM to tell the PCM to illuminate the Check Engine Light. Scan the TCM for the specific codes (like P0867) that caused it.
• P0741 — Indicates 'Torque Converter Clutch Circuit Performance or Stuck Off'. Often appears alongside P0867 in Hyundai/Kia TSBs. Low pressure (P0867) prevents the TCC from engaging properly, triggering P0741.

Climate & Environmental Factors

• High Altitude: Thinner air reduces engine power and cooling system efficiency, forcing the transmission to work harder on inclines. Excessive heat degrades transmission fluid, leading to pressure regulation problems.
• Extreme Cold: Transmission fluid becomes highly viscous in extreme cold, causing temporarily high or erratic pressure readings upon startup until the fluid reaches operating temperature.

How to Talk to a Mechanic About This Code

Say this: "I have a P0867 transmission fluid pressure code. Please check for any relevant TSBs for a software update first. I also authorize a mechanical pressure test to confirm if the issue is hydraulic or electrical before replacing parts."

This guides the mechanic toward a logical diagnostic path, prevents unnecessary sensor replacements, and prioritizes checking for cheap software fixes.

Avoid saying:

• 'My car is shifting weird.'
• 'My check engine light is on, can you just fix it?'
• 'I think I need a new transmission.'

Questions to ask before authorizing the repair:

• Did you perform a mechanical pressure test, and what were the readings compared to the spec?
• Did you check for any available TCM software updates?
• If the sensor needs replacement, is it a separate part or part of the solenoid pack/valve body?
• Does this repair require a transmission adaptive relearn procedure afterward?
• What is the warranty on the parts and labor for this specific repair?

Where to Take It: Dealer vs Independent vs Chain

• Dealer: Recommended if the cause is a known software issue or the vehicle is under warranty. Access to TSBs and proprietary software is a major advantage.
  Best for: Vehicles under powertrain warranty, Vehicles with known TSBs for software updates (Hyundai, Kia, Subaru), Complex, modern transmissions (CVT, DSG, DCT)
  Downsides: Highest labor rates, Defaults to replacing the entire transmission assembly rather than diagnosing component-level faults (Typical cost: +50% vs. baseline)
• Independent Shop: A good choice for out-of-warranty repairs at a reputable transmission-focused shop. Verify they perform mechanical pressure tests and relearn procedures.
  Best for: Out-of-warranty vehicles where the cause is a common failure (sensor, fluid change), Older, less complex transmissions (Dodge 62TE)
  Downsides: Lacks access to the latest TSBs or manufacturer-specific programming tools, Quality varies; choose a shop specializing in transmissions (Typical cost: +0% vs. baseline)
• Chain Shop: AVOID for diagnosis. Only use for a fluid service if you are confident that is the issue, and ensure they use exact OEM-specified fluid.
  Best for: Simple fluid and filter changes ONLY
  Downsides: Technicians lack specialized diagnostic skills for complex internal transmission codes, High pressure to upsell unnecessary transmission replacements (Typical cost: -10% vs. baseline)

When to Walk Away From the Repair

If the estimated repair cost exceeds 50% of the car's private-party value, sell the car as-is or trade it in.

• Car worth $5000, fix is $3000: Walk away. A $3,000 repair on a $5,000 car is a bad investment.
• Car worth $15000, fix is $900: Fix it. A $900 sensor replacement is well below the threshold and restores value.
• Car worth $3000, fix is $4500: Walk away. The repair costs more than the car is worth.

What Scan Tool You Need for This Code

Minimum: A scanner that reads transmission-specific codes and displays live data PIDs for transmission fluid pressure.

A basic $20 code reader only shows the P0867 code. It cannot display live data for 'Desired' vs 'Actual' fluid pressure, which is critical for diagnosing sensor vs. hydraulic failures.

Budget: FOXWELL NT301 (~$70) — Reads and clears transmission codes, displays live sensor data, and shows freeze-frame data.

Mid-range: Foxwell NT510 Elite (~$180) — Includes bi-directional control functions like 'Transmission Adaptation Reset', required after replacing a sensor or valve body.

Professional: Autel MaxiCOM MK808 / XTOOL D7W (~$500-800) — Provides full OE-level, bi-directional diagnostics. Performs advanced transmission relearn procedures, coding, and adaptations.

How to Clear the Code After You Fix It

1. Use an OBD-II scan tool to clear the code.
2. Perform a transmission adaptive pressure relearn procedure if a sensor, solenoid, or valve body was replaced.
3. Perform a complete drive cycle to allow readiness monitors to set.

Drive cycle (~30 minutes): A complete drive cycle involves a cold start, a period of idle, mixed city driving, and steady highway-speed driving. This allows the TCM to verify the repair under all operating conditions.

Readiness monitors affected: Comprehensive Component Monitor, Transmission Control Module Monitor

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

Watch out for:

• Disconnecting the battery will not clear the permanent DTC (pDTC) and fails to reset adaptive learning values.
• The code returns quickly if the underlying hydraulic or electrical fault is not repaired.
• Skipping the adaptive relearn procedure after replacing parts causes persistent shifting issues.

Will This Fail Emissions / State Inspection?

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

• California: An active P0867 code causes an automatic smog check failure. All readiness monitors must be 'Ready', which is blocked by this fault.
• New York: The NYS inspection includes an OBD-II scan. An illuminated Check Engine Light for P0867 is an automatic failure.
• Texas: In emissions-testing counties, an illuminated Check Engine Light from P0867 results in an automatic inspection failure.

Most Commonly Affected Vehicles

• Hyundai/Kia Elantra, Accent, Venue, Kona / Rio, Forte (2019-2022) — Known issues with the fluid pressure sensor and TCM software on IVT transmissions. TSBs 23-AT-010H, 20-01-028H, and SA476 provide specific diagnostic paths, often starting with a software update before replacing parts.
• Nissan Altima, Murano, Rogue, Sentra (2008-2018) — Many Nissan models with CVTs are prone to fluid pressure issues. This code is often a serious precursor to CVT failure. TSB NTB15-087a addresses related pressure codes by suggesting a valve body replacement.
• Dodge/Chrysler/Jeep Grand Caravan, Town & Country, Journey, Ram 1500 (2002-2016) — Vehicles with 42RLE, 545RFE, and 62TE transmissions experience this code. On the 62TE, this code often points to either a clogged filter or a faulty solenoid pack.
• Subaru Ascent, Forester, Crosstrek (2019-2021) — A safety recall (WUJ-09, TSB 16-141-23R) was issued for the 2019 Ascent for a faulty harness causing incorrect pressure readings. On other models, this code signals an impending valve body failure.
• Volkswagen Golf GTE, Passat GTE (2015-2020) — On hybrid models with the DQ400E transmission, P0867 indicates an internal mechatronic unit problem. A key symptom is the hydraulic pump running continuously.
• Honda Accord, Civic, Odyssey (2010-2018) — Pressure-related codes appear due to failing pressure switches, degraded fluid, or internal TCM faults. Switches are often located on the exterior of the transmission case.
• Ford Explorer, Focus, F-150 (2011-2019) — On some models, this code points to an internal PCM/TCM hardware malfunction rather than a hydraulic issue. Diagnosis must rule out electronic faults before condemning the transmission.
• Chevrolet Silverado, Equinox, Malibu (2010-2019) — Caused by bad sensors or low fluid. In trucks used for towing, installing an auxiliary transmission cooler prevents the overheating that precedes pressure codes.

Manufacturer-Specific Notes

• Hyundai/Kia: For IVT models, TSB #23-AT-010H states that if P0867 is present without drivability concerns, check for a TCM software update first, then replace only the fluid pressure sensor. If drivability issues are present, replace the transmission.
• Nissan: On CVT models, this code is a precursor to catastrophic failure. Nissan extended the CVT warranty on many 2012-2019 models to 84 months/84,000 miles. Check your VIN for coverage before paying for repairs.
• Dodge/Chrysler: The pressure sensor is integrated into the solenoid pack on the valve body of 42RLE and 62TE transmissions. Failure requires replacing the entire pack (e.g., Mopar P/N 68376696AA), making the repair more expensive than a simple sensor swap.
• Subaru: For the 2019 Ascent, safety recall WUJ-09 addresses a faulty transmission harness causing P0867. For other models, Subaru extended the CVT warranty to 10 years/100,000 miles, potentially covering valve body failures triggering this code.

Real Owner Stories

2020 Kia Rio at 78K miles - The Intermittent Sensor Scare

Check engine light came on with P0867 shortly after a remanufactured transmission was installed. The car shifted perfectly.

Outcome: The issue was a faulty transmission fluid pressure sensor on the remanufactured unit. Replacing the sensor fixed the code.

Lesson: If P0867 appears without shifting problems on a Hyundai/Kia, suspect the pressure sensor or a software glitch before assuming the transmission is bad.

2021 Subaru Forester at 170K KM - The Misdiagnosis Chain

The dealer performed a valve body repair for $2,700. Three months later, a speed sensor was replaced for $500. Seven minutes later, the car sputtered with code P0867.

Outcome: The dealership quoted $14,000 CAD for a full CVT replacement, citing the third-party service to deny warranty assistance.

Lesson: Escalating repairs (valve body, sensor, full unit) point to an initial misdiagnosis. Using non-OEM fluid voids warranty assistance and causes cascading failures.

2015 Dodge Grand Caravan - The DIY Repair Trap

Vehicle had code P0868 and rough shifting. A dealer quoted $6,000 for a transmission replacement.

Outcome: After the DIY repair, the vehicle lost Drive entirely. The original P0868 code returned alongside a new P076A code.

Lesson: Internal transmission work is complex. DIY repairs often introduce new problems or fail to solve the root cause, making professional diagnosis necessary.

2015 Nissan Versa Note at 95K miles - The 'Coincidental' Failure

After a routine fluid change at a dealership, the car jerked shifting into Drive. A day later, RPMs shot to 6000 while losing speed.

Outcome: The dealer diagnosed a complete CVT failure and quoted $5,000 for a replacement.

Lesson: If a transmission fails immediately after a fluid service, it is rarely a coincidence. New fluid dislodges debris or cleans away varnish compensating for worn parts, exposing pre-existing issues.

How to Prevent This Code From Triggering

• Change transmission fluid and filter at recommended intervals. (Every 30,000 to 60,000 miles for most automatic transmissions.) — Old fluid degrades, loses hydraulic properties, and fails to manage heat. Clean fluid and a fresh filter ensure proper lubrication and prevent clogs.
• Use ONLY the manufacturer-specified (OEM) transmission fluid. (Every time fluid is added or changed.) — Modern transmissions require fluid with specific frictional and viscosity characteristics. Generic fluid causes slipping and triggers pressure codes like P0867.
• Maintain the vehicle's cooling system. (Check coolant levels monthly; service per owner's manual.) — The transmission relies on the engine's cooling system. A faulty radiator forces the transmission to run hotter, causing fluid breakdown and failure.
• Install an auxiliary transmission cooler. (One-time installation, especially for vehicles used for towing or in hot climates.) — An auxiliary cooler prevents overheating, preserving fluid integrity and preventing high temperatures that precede pressure failures.
• Avoid aggressive driving and heavy towing beyond capacity. (Daily habit.) — Hard acceleration and excessive loads stress internal components and generate excess heat, accelerating wear on the pump and clutches.

Frequently Asked Questions

What is the most common misdiagnosis for P0867?

The most common misdiagnosis is replacing the pressure sensor without verifying actual transmission pressure with a mechanical gauge. If mechanical pressure is bad, a new sensor won't fix the underlying hydraulic failure. Always check for simple software updates via TSBs before replacing hardware.

The code went away on its own. Am I in the clear?

No. An intermittent P0867 code means the TCM detected a serious fault that temporarily returned to a borderline-acceptable range. The underlying problem, like a failing sensor or sticking solenoid, still exists and requires immediate diagnosis to prevent severe damage.

Why did P0867 appear right after a transmission fluid change?

This usually happens due to incorrect fluid levels, using non-OEM fluid, or new fluid dislodging debris that clogs the filter. It also occurs if a sensor connector was accidentally bumped during the service.

My fluid level is fine. What's the next most likely cause?

If the fluid level and condition are good, check for a TCM software update via manufacturer TSBs. If no TSB applies, the next most likely hardware culprit is a faulty transmission fluid pressure sensor.

Can I fix P0867 myself?

Basic checks like fluid level and visual wiring inspections are DIY-friendly, but most P0867 fixes require advanced skills. Replacing a sensor often involves dropping the transmission pan, and accurate diagnosis requires a mechanical pressure test. Stop DIY and go to a shop if fluid is full and clean.

How can I prevent code P0867?

Change your transmission fluid and filter according to the schedule in your owner's manual. Using the correct, manufacturer-specified fluid is absolutely critical, as incorrect fluid causes pressure and shifting issues.

Is this an expensive repair?

Costs vary widely. A software update or fluid top-off costs $100-$300, while a sensor replacement ranges from $300 to $900. If the code stems from an internal failure like a bad pump or burnt CVT, expect $4,000-$8,000+ for a replacement.

Key Takeaways

• Check your transmission fluid level and condition first; low or degraded fluid is the leading cause of P0867.
• Stop driving immediately to prevent a $400 sensor repair from escalating into a $4,000+ complete transmission replacement.
• Search for manufacturer Technical Service Bulletins (TSBs) before replacing parts, as a 1-hour dealer software update fixes this code on many modern Hyundai and Subaru models.
• Perform a mechanical pressure test to definitively prove whether the transmission has a catastrophic internal hydraulic failure or just a faulty $50 electronic sensor.
• Prepare for high repair costs on Nissan CVTs and VW DSGs, where P0867 frequently signals imminent, catastrophic internal transmission failure.