P0084 Nissan Code - Exhaust Valve Timing Control Magnet Retarder Circuit Bank 2

P0084 refers to an issue in the exhaust valve timing control magnet retarder circuit for Bank 2, indicating a possible electrical or mechanical problem with the timing system.

Symptoms may include reduced engine performance, poor fuel economy, rough idling, an illuminated check engine light, and in some cases, difficulty starting the engine.

Common causes include a faulty exhaust valve timing control solenoid, damaged wiring or connectors in the circuit, low engine oil levels, or contaminated oil affecting system performance.

Repairs may involve replacing the exhaust valve timing control solenoid, repairing or replacing damaged wiring, ensuring proper oil levels, or performing an oil change if the oil is dirty or contaminated.

While the vehicle may still be drivable, ignoring the P0084 code can lead to decreased engine performance and potential long-term damage. It’s best to address the issue promptly.

A mechanic will use a scan tool to confirm the code, inspect the timing control solenoid and circuit, check for oil contamination, and test for proper operation of the timing system.

Yes, low or dirty engine oil can prevent the exhaust valve timing control system from functioning properly and trigger the P0084 code.

The solenoid is a key component that adjusts the exhaust valve timing for better engine efficiency. If it fails, it can cause the P0084 code and affect engine performance.

Yes, the P0084 code specifically refers to an issue in the exhaust valve timing control circuit for Bank 2, which is the side of the engine opposite Bank 1.

Repair costs can vary depending on the cause, but replacing the solenoid typically costs $150–$300, while wiring repairs or oil changes may cost less.