Error Code P0911 is defined as Gate Select Actuator Circuit Range Performance. This is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, especially those made since 1996 up to the present. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model to another.
Vehicles with Automated Manual Transmissions and Dual Clutch often use a system called Gear Shift Actuator Module (GSAM). The job of GSAM is to engage or disengage the clutch and choose the transmission gear based on the commands from the Transmission Control Module (TCM).
Error Code P0911 is stored when the Engine Control Module (ECM) determines that Gate Select Actuator is not working correctly.
Other related codes include:
- Error Code P0910
- Error Code P0912
- Error Code P0913
As with most codes, this error code activates the Check Engine light. Other common symptoms include:
- Transmission slippage (failure to go to certain gears)
- Increased fuel consumption
An anomaly usually causes this code in the Gear Select Actuator function that triggers an open circuit signal. This is usually a result of:
- Wiring problems (faulty wirings or connectors)
- Defective TCM
- A programming error in TCM
- Defective select solenoid
How to Check
You will need an advanced scanned, a specialized scanner, a wiring diagram of the Control Area Network Bus, a digital volt/ohmmeter (DVOM), and an auxiliary ground cable.
First, check the connectors, wirings, and all related components. Look for signs of damage or faults. Replace damaged components as necessary, then clear the codes to see if the Error Code comes back.
If the code comes back, then proceed on checking the voltage and ground signal at the Gate Select Actuator circuit using the DVOM.
If there is no voltage or ground signal present, disconnect the PCM and related control modules to test for the Gate Select Actuator circuit’s continuity.
Next, check the pins of the CAN bus wiring harness using a specialized scanner. Also, refer to the CAN-BUS wiring diagram and compare the results to the manufacturer’s specifications. Use an auxiliary cable to help with the CAN Bus harness diagram check.
Next, check the PCM and Gate Select Actuator circuit switch and PCM for continuity. Then, test for continuity at the TCM as well. Next, check the continuity of the PCM and see if it has gone bad.
Clear the codes and retest to see if the problem comes back.
How to Fix
- Replacement of faulty wiring, connectors, and related components
- Make sure all wirings and connectors are secured in place
- Replacement of damaged Gate Select Actuator circuit
- Replacement of faulty Gate Select Actuator circuit switch
- Replacement of damaged CAN Bus harness wiring
- Replacement of damaged PCM or TCM (rare)
This code must be fixed as soon as possible, leading to more serious damage to the vehicle.