Gear Shift Reverse Actuator Circuit Low
The P0926 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the gear shift reverse actuator circuit. This actuator is responsible for engaging the reverse gear in automatic transmissions. A low circuit condition typically means the voltage is below the expected range, which can prevent the transmission from shifting into reverse or cause erratic shifting behavior.
01. Most Common Causes
- Faulty gear shift reverse actuator
- Open or shorted wiring in the actuator circuit
- Poor electrical connection at the actuator or PCM
- Failed PCM (rare)
02. Symptoms You Will Notice
- Transmission fails to engage reverse gear
- Check Engine Light illuminated
- Delayed or harsh reverse engagement
- Transmission stuck in park or neutral
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for related codes.
Step 2: Visually inspect the wiring and connectors for damage, corrosion, or loose connections.
Step 3: Test the actuator circuit voltage with a multimeter; compare to manufacturer specifications.
Step 4: If circuit is good, test the actuator resistance; replace if out of spec.
Step 5: If all else fails, check for PCM issues or perform a transmission control module update.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe to drive because the vehicle may not shift into reverse, which can be dangerous in parking situations or if you need to back up. Additionally, driving with a transmission issue can cause further damage.
How much does it cost to fix?▼
The cost to fix P0926 typically ranges from $50 to $150 for diagnosis and repair, but it can be higher if the actuator or PCM needs replacement. Parts alone for the actuator can cost $30-$100, plus labor.