P0801 CHEVROLET - Reverse Inhibit Solenoid Control Circuit
Faulty Reverse Inhibit Solenoid
Reverse Inhibit Solenoid harness is open or shorted
Reverse Inhibit Solenoid circuit poor electrical connection
When is the code detected?
When the Reverse Inhibit solenoid energizes, the operator can shift the transmission into reverse. The Powertrain Control Module (PCM) enables the Reverse Inhibit solenoid whenever vehicle speed is below 5 mph. When the vehicle speed is above 5 mph, the PCM de-energizes the solenoid, which prevents the operator from shifting the transmission into reverse.
Engine Light ON (or Service Engine Soon Warning Light)
P0801 Chevrolet Description
An ignition voltage is supplied to the Reverse Inhibit solenoid. The Powertrain Control Module (PCM
) controls the solenoid by grounding the control circuit via an internal switch called a driver. The driver supplies the ground for the component being controlled. Each driver has a fault line which the PCM
monitors. When the PCM
commands a component ON, the voltage of the control circuit should be low (near 0 volts). When the PCM
commands the control circuit to a component OFF, the voltage potential of the circuit should be high (near battery voltage). If the fault detection circuit senses a voltage other than what is expected, the fault line status changes causing the P0801 code to set.