- Faulty Low coast brake solenoid valve
- Low coast brake solenoid valve harness is open or shorted
- Low coast brake solenoid valve circuit poor electrical connection
When is the code detected?TCM does not receive the proper voltage signal from the sensor.
TCM monitors each pressure switch and solenoid monitor value, and detects as irregular when engine brake of 1st gear acts other than at 1M position.
- Engine Light ON (or Service Engine Soon Warning Light)