P0888
Traction Control Module (TCM) Power Relay Always Off
Generic code
Transmission System
High severity
Hard repair
Free on OBD DashX
Want real-world data on P0888?
See which problems come with P0888, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P0888 means
- The fault code P0888 indicates that there is a problem with the circuit that controls the power relay for the transmission control module. This may cause the transmission to not function properly or fail to shift gears.
Possible symptoms
- Illuminated check engine light
- Transmission not shifting gears properly
- Transmission stuck in one gear
- Reduced engine power or acceleration
- Vehicle may not start
Possible causes
- Failed power relay
- Faulty wiring or connections in the circuit
- Loose or corroded electrical connections
- Failed transmission control module
Related parts
- Traction Control Module (TCM): Most modern vehicles are equipped with anti-lock brakes and traction control. Traction Control Module (TCM) is the part of the car computer that controls the electronic stability system (ESC) of the car. Problem leads to inefficient braking, ABS not working
Possible solutions
- Replace the power relay
- Check and repair any damaged wiring or connections
- Tighten or clean any loose or corroded electrical connections
- Replace the transmission control module if necessary
Free on OBD DashX
P0888 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P0888 No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.