P0867 critical

Transmission Fluid Pressure

The P0867 code means the vehicle's onboard diagnostic system has detected: Transmission Fluid Pressure. This is a critical severity code.

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Keep driving?: No -- stop driving
DIY difficulty: hard
Estimated cost: $100 - $3,500 (parts and labor)

Check Your Fluid First

ANCEL AD310 OBD-II Scanner

Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.

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Read Transmission Codes

LAUNCH CRP123X (Reads All Systems)

Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.

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Common Symptoms

Check Engine Light illuminated
Transmission slipping badly
Delayed or no gear engagement
Transmission overheating

Probable Causes (Ranked by Likelihood)

Low transmission fluid from leak Very High
Worn transmission pump High
Clogged transmission filter Moderate
Internal seal failure reducing line pressure Low

Step-by-Step Diagnostic Procedure

Check transmission fluid level and look for leaks
Perform a transmission line pressure test at idle and stall
Inspect transmission pan for metal debris indicating internal damage
Check transmission cooler and lines for restrictions

Frequently Asked Questions

Is P0867 a sign of serious transmission failure?

P0867 can indicate serious issues. Low fluid pressure means the transmission cannot properly engage clutches and bands, which can lead to rapid internal damage if not addressed immediately.

Should I stop driving immediately?

Yes, driving with low transmission fluid pressure causes overheating and accelerated wear. Pull over safely and have the vehicle towed.

How much fluid can a transmission lose before this code appears?

Even a loss of one quart can trigger low pressure codes in some transmissions. The exact threshold depends on the transmission design and the TCM calibration.