Transmission Fluid Pressure
What it means
P0867 is a general transmission fluid-pressure fault: the controller sees line pressure that is outside the expected range. The engine starts and runs, but incorrect pressure can make the transmission slip, shift harshly, or stick in a gear, and prolonged driving in that state wears internal parts. Start by checking fluid level and condition.
Can I keep driving? The engine runs, but abnormal line pressure can cause slipping or harsh shifts that damage the transmission — limit driving until it's checked.
Real-world scan data
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Check-engine light on
- Harsh or delayed shifting
- Transmission slipping or stuck in one gear
- Reduced fuel efficiency
Common causes
Most likely first
- Low or dirty transmission fluidLikely
- Faulty transmission fluid pressure sensorCommon
- Clogged transmission filter restricting flowCommon
- Sticking pressure control solenoid / valve-body wearLess often
- Internal transmission wear (worn pump or seals)Less often
How to diagnose & fix
Work through it in order
- Check fluid level and condition first; correct or service if low or burnt.
- Read freeze-frame and compare reported pressure to actual line pressure with a gauge.
- Inspect and replace the fluid filter if clogged.
- Test the pressure sensor and pressure-control solenoid; replace faulty parts. If pressure is genuinely low, inspect the pump/valve body. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0867?+
Can I just clear P0867?+
Related codes
Read & clear P0867 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.