P0888 Dodge - Transmission Relay Always Off
- Transmission Control Relay harness is open or shorted
- Transmission Control Relay circuit poor electrical connection
- Faulty Transmission Control Relay
- Faulty Transmission Solenoid/Pressure Switch Assembly
Inadequate Transmission Control Relay Output voltage can also cause DTCs P0846, P0869, P0871, P0876 or P0988 to set. This does not indicate an internal transmission or solenoid TRS problem. Repairing the P0888 fault should also eliminate the related DTCs.
When is the code detected?
The Transmission Control Module (TCM) has detected less than 3 volts at the Transmission Control Relay output circuit
- Engine Light ON (or Service Engine Soon Warning Light)
P0888 Dodge Description
The transmission control relay is used to supply power to the solenoids and pressure switches when the transmission is in normal operating mode. The relay output is fed back to the TCM. It is referred to as Transmission Control Relay Output. This circuit does not supply power to the TCM, it is only a sense circuit. When the relay is off, no power is supplied to the solenoids and pressure switches, and the transmission is in limping or default mode.
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