P0868
Transmission Fluid Pressure Low
TCM detects line pressure below the calibrated minimum during normal operation, suggesting hydraulic leakage, low fluid or pump wear.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Common causes
Ordered by how often each turns out to be the cause.
- Low transmission fluidCommon
- Transmission pump wearPossible
- Internal hydraulic leakPossible
Parts involved
- Transmission Pump
- Valve Body
- Transmission Fluid
P0868 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.