P0085: Exhaust Valve Control Solenoid Circuit Low (Bank 2)
The P0085 code indicates that the Engine Control Module (ECM) has detected a low voltage condition in the exhaust valve control solenoid circuit for Bank 2. This solenoid is part of the variable valve timing (VVT) system, which adjusts exhaust valve timing to optimize engine performance and emissions. A low circuit condition typically means the voltage is below the expected range, often due to a short to ground, open circuit, or faulty solenoid. Bank 2 refers to the side of the engine opposite cylinder #1.
01. Most Common Causes
- Faulty exhaust valve control solenoid (Bank 2)
- Open or shorted wiring in the solenoid circuit
- Poor electrical connection at the solenoid connector
- Failed ECM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance and fuel economy
- Rough idle or engine hesitation
- Possible engine misfire
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect the exhaust valve control solenoid and wiring for damage or corrosion.
Step 3: Test the solenoid resistance with a multimeter (compare to specs).
Step 4: Check for voltage and ground at the solenoid connector with the engine running.
Step 5: If wiring and solenoid are good, test the ECM output or replace the solenoid.
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. Have it diagnosed promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor, depending on the cause and vehicle.