The P0887 trouble code indicates a malfunction in the transmission control module (TCM) power relay control circuit, specifically that it’s high.
P0887 TCM Power Relay Control Circuit High
Code symptoms P0887.
1. Check Engine Light (CEL) is illuminated.
2. The transmission may fail to shift gears properly or go into limp mode.
3. Transmission may experience harsh shifting or slipping.
4. Other related trouble codes may be present.
Causes of the code P0887.
1. Faulty transmission control module (TCM) power relay.
2. Short circuit in the TCM power relay control circuit.
3. Corroded or loose electrical connectors in the TCM power relay circuit.
4. Faulty TCM.
5. Blown fuse related to the TCM power supply.
Code Solutions P0887.
1. Replace the faulty transmission control module (TCM) power relay.
2. Repair any short circuits in the TCM power relay control circuit.
3. Clean and tighten any corroded or loose electrical connectors in the TCM power relay circuit.
4. Replace any blown fuses related to the TCM power supply.
5. If the TCM itself is faulty, it will need to be replaced.