P0867
Transmission Fluid Pressure
Transmission / fluid pressure
Generic OBD-II
Medium
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.
Medium
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.
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?+
Keep it short. Wrong line pressure makes the transmission slip or shift harshly, which accelerates internal wear. Check the fluid and get it diagnosed.
Can I just clear P0867?+
It returns until the pressure problem is fixed. Clearing does not restore proper hydraulic pressure.
Related codes
Often seen with P0867
Read & clear P0867 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX