What does P0868 mean?
This code comes from the transmission control system. Line pressure is lower than commanded.
The part is electrically connected, but it is not doing what the computer commanded.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Check engine light
- Harsh, late or erratic shifting
- Transmission stuck in one gear (limp mode)
- Flare between gears
Common causes
- Sticking or worn component
- Restricted passage or linkage
- Wiring with high resistance
- Low battery or charging voltage
- Low or burned transmission fluid
- Failed solenoid
- Wiring or connector problem (often at the transmission case connector)
How to diagnose P0868
- Command the component with a scan tool and watch whether it responds.
- Check the component's actual movement or flow.
- Inspect wiring and voltage supply.
- Check fluid level and condition using the correct procedure for your transmission.
- Read codes from the transmission module itself, not just the engine computer.
How to fix it
- Correct the fluid level and service the fluid
- Repair wiring
- Replace the solenoid or valve body
- Repair or replace the transmission if worn
Estimated repair cost
Likely repairs for P0868 run from about $150 to $5,500, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Transmission fluid and filter service | $150 - $400 |
| Transmission solenoid / solenoid pack | $300 - $900 |
| Transmission rebuild or reman unit | $2,500 - $5,500 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P0868?
High severity
Limp mode often locks the transmission in one gear. Drive gently and only as far as the shop.
P0868 FAQ
What does P0868 mean?
P0868 stands for "Transmission Fluid Pressure Low". This code comes from the transmission control system.
Can I drive with a P0868 code?
Limp mode often locks the transmission in one gear. Drive gently and only as far as the shop.
How much does it cost to fix P0868?
It depends on the cause. The likely repairs for P0868 range from about $150 to $5,500 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P0868?
The most common causes are: sticking or worn component; restricted passage or linkage; wiring with high resistance.