Exhaust Valve Control Solenoid Circuit Malfunction (Bank 2)
The P0084 code indicates a problem in the electrical circuit of the exhaust valve control solenoid on bank 2 of the engine. This solenoid is part of the variable valve timing (VVT) system, which adjusts exhaust valve timing for optimal performance and emissions. The powertrain control module (PCM) detects an open, short, or excessive resistance in the solenoid circuit, preventing proper valve timing control.
01. Most Common Causes
- Faulty exhaust valve control solenoid (bank 2)
- Open or shorted wiring in the solenoid circuit
- Corroded or loose electrical connector
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance and fuel economy
- Rough idle or hesitation during acceleration
- Possible engine misfire
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the solenoid connector and wiring for damage or corrosion.
Step 3: Test solenoid resistance with a multimeter (specs vary; typically 10-20 ohms).
Step 4: Check for battery voltage and ground at the solenoid connector with ignition on.
Step 5: If wiring and solenoid are good, test PCM output signal; replace PCM if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause reduced performance and potential engine damage. You should have it diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, including parts and labor. The solenoid itself is $50-$150, and labor is 1-2 hours.