Actuator Supply Voltage Circuit Low
Code P2670 indicates that the powertrain control module (PCM) has detected a low voltage condition in the actuator supply voltage circuit. This circuit provides power to various actuators such as variable valve timing solenoids, transmission shift solenoids, or other electronic actuators. A low voltage reading suggests a short to ground, open circuit, or excessive resistance in the wiring or connectors. This can lead to improper actuator operation, affecting engine performance, transmission shifting, or emissions control.
01. Most Common Causes
- Faulty actuator supply voltage relay
- Open or shorted wiring in the actuator supply circuit
- Corroded or loose connector at the PCM or actuator
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or hesitation
- Transmission shifting issues
- Possible stalling or rough idle
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Inspect the actuator supply voltage relay and fuse for damage or corrosion.
Step 3: Check wiring and connectors for shorts, opens, or corrosion, especially at the PCM and actuators.
Step 4: Measure voltage at the actuator supply circuit with a multimeter; compare to manufacturer specifications.
Step 5: If circuit is intact, test the PCM for proper output; replace if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause erratic actuator behavior, leading to poor performance or transmission damage. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the root cause (e.g., relay, wiring repair, or PCM replacement).