P1672 Code? Here’s How to Fix It Quickly and Easily

The P1672 code is a manufacturer-specific powertrain code. Its exact definition depends entirely on the vehicle application, commonly indicating a low engine oil level lamp circuit fault or a camshaft position actuator issue.

This code identifies a detected electrical or circuit condition, not necessarily a failed component. Proper diagnosis requires verifying the exact factory definition and testing the relevant control circuits or actuators.

Key Takeaways

• The P1672 code is manufacturer-specific, commonly indicating a low engine oil level lamp circuit fault on GM or a camshaft position actuator issue on Volvo.
• Possible causes include damaged wiring, corroded connectors, a failed variable valve timing solenoid, or an instrument cluster fault.
• Symptoms vary by application and may include an illuminated Check Engine Light, an inoperative oil warning lamp, or engine performance issues.
• Diagnosis requires confirming the exact factory definition and testing the specific control or actuator circuits.
• Repairs depend on the confirmed fault and may involve wiring repair, solenoid replacement, or cluster repair.

P1672 Code Description and Implications

P1672 is a manufacturer-specific error code. Its exact definition depends entirely on the vehicle application.

Certain GM applications: The code indicates a Low Engine Oil Level Lamp Control Circuit malfunction. The powertrain control module detects an electrical fault in the circuit commanding the low oil level warning indicator.

Some Volvo applications: The code indicates a Camshaft Position (CMP) Actuator Circuit malfunction. The engine control module detects a fault in the control circuit for the variable valve timing solenoid.

Common Causes of the P1672 Code

Several conditions can trigger this manufacturer-specific malfunction code. Identifying the exact cause requires inspecting the specific control circuits.

• For GM applications: Damaged wiring or corroded connectors in the oil level lamp circuit, a burned-out warning lamp bulb, or an internal instrument cluster fault.
• For Volvo applications: A failed variable valve timing (VVT) solenoid, damaged wiring harness, poor electrical connections, or restricted engine oil flow to the actuator.

Symptoms Associated With P1672

Symptoms vary depending on the specific system design and the underlying fault condition.

• GM applications: The low engine oil level warning lamp may fail to illuminate during the bulb check or when oil is actually low. The Check Engine Light may also turn on.
• Volvo applications: Engine misfires, rough idle, reduced power, or poor fuel economy due to incorrect camshaft timing.

Diagnosing the P1672 Trouble Code

Diagnosis must begin by confirming the exact factory definition and inspecting the physical system components.

• Verify the exact manufacturer definition and locate the wiring diagram for the specific lamp control or actuator circuit.
• For GM applications: Inspect the wiring to the dashboard cluster, check the warning lamp bulb or LED, and use a scan tool to command the lamp on and off.
• For Volvo applications: Test the VVT solenoid coil resistance and verify the presence of battery voltage and a clean ground at the connector. Inspect the oil control valve for debris.

Repairing the P1672 Issue

Repairs depend entirely on the confirmed root cause of the system malfunction.

• If wiring damage or an open/short circuit is found, repair or replace the affected harness sections and secure the routing.
• Clean or replace corroded connectors to restore proper electrical contact and circuit integrity.
• If the VVT solenoid or warning lamp assembly fails electrical testing and all external circuits are intact, replace the component using a part meeting the correct vehicle specification.

Cost Considerations for P1672 Repairs

Cost depends on diagnostic time, component accessibility, required parts, programming requirements, and labor.

Replacing a VVT solenoid or repairing a wire is generally less expensive than diagnosing complex instrument cluster faults or replacing a powertrain control module.

Prevention Strategies for Future Occurrences

While electrical and mechanical failures are not always preventable, some practices can reduce the risk of system issues.

• For Volvo applications, maintaining the correct engine oil level and performing regular oil changes helps prevent sludge buildup that can clog the VVT solenoid screen.
• Inspecting exposed wiring and connectors in the engine bay can help identify developing damage from chafing, heat exposure, or moisture intrusion.

Troubleshooting Tips and Best Practices

Always consult the exact manufacturer service information for your vehicle’s wiring diagrams and system architecture.

• Do not assume the VVT solenoid or instrument cluster is faulty simply because a circuit code is present; wiring damage and blown fuses must be ruled out first.
• On Volvo applications, verify that the engine oil is at the correct level and in good condition before condemning the electrical components, as low oil pressure can affect actuator operation.
• Verify technical service bulletins for your specific make and model, as manufacturers occasionally issue updated solenoid part numbers or revised wiring harnesses.

More OBD-II Codes

Frequently Asked Questions

Is the P1672 code generic or manufacturer-specific?

No. P1672 is a manufacturer-specific code. Its exact definition varies by vehicle make, commonly indicating an oil level lamp circuit fault or a camshaft position actuator issue.

Can I drive my car with a P1672 code?

It depends on the application. On Volvo vehicles, a failed camshaft actuator can cause severe drivability issues and potential engine damage, making it unsafe to drive.

Will low engine oil cause a P1672 code?

On Volvo applications, low or dirty engine oil can restrict flow to the variable valve timing solenoid, causing actuator performance issues that may trigger related circuit or performance codes.

Can a wiring issue trigger the P1672 code?

Yes. An open circuit, short to ground, or high resistance in the warning lamp or camshaft actuator control wire will cause an electrical circuit fault and trigger the code.

Will a P1672 code cause an emissions test failure?

Yes. Any code that illuminates the Check Engine Light or indicates an active powertrain control module circuit fault will cause an automatic failure during an OBD-II emissions inspection.

What Should You Do About the P1672 Code?

Confirm the exact factory definition for your specific vehicle application. Follow the applicable manufacturer diagnostic procedure to test the relevant control circuits, actuator components, and warning lamp systems.

Repair or replace the confirmed failed component or fix the identified wiring fault, then retest the system to ensure proper operation.