Engine Mount Control Circuit Low
The P0AB7 code indicates that the engine mount control circuit has a low voltage condition. This typically means the engine mount actuator or its wiring has a short to ground, open circuit, or the control module is not receiving the expected signal. The engine mount is an active component that adjusts stiffness to reduce vibration; a fault can cause excessive engine movement and noise.
01. Most Common Causes
- Faulty engine mount actuator
- Short to ground in control circuit wiring
- Open circuit in harness or connector
- Failed engine control module (ECM)
02. Symptoms You Will Notice
- Check Engine Light on
- Excessive engine vibration or noise
- Engine feels loose or moves abnormally
- Possible drivability issues
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect engine mount actuator and wiring for damage or corrosion.
Step 3: Test circuit voltage and resistance at the actuator connector per manufacturer specs.
Step 4: If circuit is good, replace the engine mount actuator; if not, repair wiring or replace ECM.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
Driving short distances is possible, but excessive engine movement can damage other components. It's best to repair promptly.
How much does it cost to fix?▼
Typical repair costs range from $150 to $400, including parts and labor, depending on the vehicle and whether wiring repair is needed.