Gate Select Actuator Circuit High Voltage
The P0913 code indicates that the transmission control module (TCM) has detected a voltage higher than the specified range in the gate select actuator circuit. This actuator is responsible for moving the shift mechanism within the transmission to select the correct gate (e.g., Park, Reverse, Neutral, Drive). A high voltage condition can be caused by a short to power, a faulty actuator, or internal TCM issues. This can lead to improper gear selection or transmission malfunction.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission stuck in one gear or fails to shift
- Difficulty selecting gears (e.g., cannot shift out of Park)
- Transmission warning message on dashboard
2. Most Common Causes
- Short to battery voltage in the gate select actuator circuit
- Faulty gate select actuator
- Damaged wiring or connector
- Faulty transmission control module (TCM)
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
Step 2: Visually inspect the gate select actuator wiring and connectors for damage, corrosion, or shorts.
Step 3: Measure voltage at the actuator connector with the ignition on; compare to manufacturer specifications.
Step 4: Test the actuator resistance and operation using a multimeter and scan tool bi-directional controls.
Step 5: If wiring and actuator are okay, suspect a faulty TCM and perform further diagnostics.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not recommended. The transmission may fail to shift properly, potentially causing unsafe driving conditions or leaving you stranded.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on the cause. Replacing the actuator can cost $200-$300, while TCM replacement is more expensive.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.