Engine Mount Control Circuit High Voltage
The P0A16 code indicates that the Powertrain Control Module (PCM) has detected a voltage signal from the engine mount control circuit that is higher than the specified range. This circuit controls the active engine mounts, which adjust to reduce vibration. A high voltage condition may be caused by a short to power, a faulty engine mount actuator, or a PCM issue.
01. Most Common Causes
- Short to power in the engine mount control circuit
- Faulty engine mount actuator
- Damaged wiring or connector
- Failed PCM
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Excessive engine vibration or noise
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Visually inspect the engine mount wiring and connectors for damage or corrosion.
Step 3: Test the engine mount actuator resistance and compare to specifications.
Step 4: Check for shorts to power or ground in the control circuit using a multimeter.
Step 5: If all else is okay, suspect a faulty PCM and perform further diagnostics.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but excessive vibration may cause further damage. Have it inspected soon.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on the cause and labor rates.