P0912: OBD-II Fault Code for Low Gate Select Actuator Circuit
A transmission gate selector actuator assembly contains several sensors and an electric motor. The ECU reads data from the sensors, then activates the electric motor to engage a gear based on the position of the shift lever. If there is an abnormally low voltage signal on the gate select actuator circuit, a DTC P0912 will be recorded.
How severe is the code?
If the ECU cannot use the gate select actuator to engage the gear you have selected, you will experience a number of driving problems, including irregular gear changes and clutch slipping.
Symptoms
Symptoms of a P0912 include:
Harsh shifts
Delayed shifts
Irregular shifting patterns
Transmission seems stuck in gear
Failure to engage gear
Clutch slipping
Engine seems to misfire
Causes
Faulty shift mechanism
Faulty clutch position sensor
Faulty clutch actuator
Misadjusted control linkages
Damaged wiring and/or connectors
Faulty clutch or transmission
How to diagnose the code?
Due to the complexity of most semi-automatic transmissions, diagnosing an OBDII fault code P0912 will require the manufacturer’s troubleshooting process. But for the most part, it involves a series of electrical and mechanical tests.
What repairs will fix P0912?
Replace the shift mechanism
Replace the clutch position sensor
Replace the clutch actuator
Replace the clutch
Repair or replace damaged wiring or connectors
Adjust or repair control linkages
Repair or replace the transmission