P0888 CHRYSLER Code - Transmission Relay Always Off
|P0888 CHRYSLER code possible causes
- Faulty Transmission Control Relay
- Transmission Control Relay harness is open or shorted
- Transmission Control Relay circuit poor electrical connection
- Faulty Transmission Solenoid/Pressure Switch Assembly
|How is the P0888 CHRYSLER code repair?
Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
|P0888 CHRYSLER code tech notes
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.
|What is the cost to diagnose the P0888 CHRYSLER code
The cost to diagnose the P0888 CHRYSLER code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
|When is the P0888 CHRYSLER code detected?
This code is set when less than 3 volts are present at the Transmission Control Relay Output (switched battery) terminals at the Powertrain Control Module (PCM), when the PCM is energizing the relay.
|What are P0888 CHRYSLER code possible symptoms?
- Engine Light ON (or Service Engine Soon Warning Light)
|What is P0888 CHRYSLER code meaning?
The transmission control relay is used to supply power to the solenoid pack when the transmission is in normal operating mode. When the relay is off, no power is supplied to the solenoid pack and the transmission is in Limp-in mode. The relay output is fed back to the Powertrain Control Module (PCM
). It is referred to as the Transmission Control Relay Output circuit or switched battery.
After a controller reset (ignition key turned to the run position or after cranking engine), the controller energizes the relay. Prior to this the PCM
verifies that the contacts are open by checking for no voltage at the switched battery terminals. After the relay is energized, the PCM
monitors the terminals to verify that the voltage is greater than 3 volts.