P0888
TCM Power Relay Sense Circuit
P0888 is an OBD-II diagnostic trouble code meaning: TCM Power Relay Sense Circuit. Common causes: faulty tcm power relay, open or short circuit in the relay circuit. Estimated repair cost: $6–33.
Symptoms
- Gear shifting problems
- The gearbox goes into emergency mode
- Check Engine Light Is On
- Difficulty starting the engine
- Power Loss
Causes
- Faulty TCM power relay
- Open or short circuit in the relay circuit
- Poor contact in TCM connectors
- TCM module malfunction
- Wiring Harness Problems
How to Fix
- Check the condition of the TCM power relay
- Inspect the power circuit for damage
- Check contacts in TCM connectors
- Test TCM module
- Replace relay or repair wiring if necessary
Related codes
Error P0888 by Vehicle Brand
FAQ
What does the P0888 code mean?
P0888 is an OBD-II diagnostic trouble code that indicates: TCM Power Relay Sense Circuit
What causes a P0888 error code?
The most common causes of P0888 include: Faulty TCM power relay; Open or short circuit in the relay circuit; Poor contact in TCM connectors; TCM module malfunction.
How do I fix a P0888 diagnostic trouble code?
To fix P0888: Check the condition of the TCM power relay. Inspect the power circuit for damage. Check contacts in TCM connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0888?
Do not drive — repair immediately
How much does it cost to fix P0888?
The estimated repair cost for P0888 is $6–33. Actual cost depends on your vehicle, location, and labor rates.
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