The P0888 trouble code indicates an issue with the Transmission Control Module (TCM) Power Relay Sense Circuit.
P0888 TCM Power Relay Sense Circuit
Code symptoms P0888.
1. Check Engine Light (CEL) illuminated on the dashboard.
2. Possible drivability issues.
3. Transmission may not shift properly or smoothly.
4. Other transmission-related trouble codes may be present.
Causes of the code P0888.
1. Faulty TCM power relay.
2. Wiring or connector issues in the TCM power relay sense circuit.
3. Poor electrical connection or corrosion in the TCM power relay connector.
4. Problems with the TCM.
Code Solutions P0888.
1. Inspect and test the TCM power relay for proper operation.
2. Check wiring and connectors in the TCM power relay sense circuit for damage or corrosion.
3. Repair or replace any damaged wiring or connectors.
4. Ensure good electrical connections and clean any corrosion from connectors.
5. If necessary, replace the TCM.
6. Clear the trouble codes from the vehicle’s computer after repairs are complete.
7. Test drive the vehicle to confirm that the issue has been resolved.