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P0085 – Exhaust Valve Control Solenoid Circuit Low (Bank 2)

P0085 – Exhaust Valve Control Solenoid Circuit Low (Bank 2)
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P0085 – Exhaust Valve Control Solenoid Circuit Low (Bank 2)

Description

The P0085 trouble code indicates that the Engine Control Module (ECM) has detected a low voltage condition in the exhaust valve control solenoid circuit on Bank 2. The exhaust VVT solenoid controls oil flow to the variable valve timing system, allowing the engine to adjust exhaust valve timing for improved performance, fuel economy, and emissions.

Common Causes

  • Faulty exhaust VVT control solenoid.
  • Short circuit to ground in the wiring.
  • Damaged or corroded connector.
  • Open circuit in the solenoid wiring.
  • Low or dirty engine oil.
  • Faulty ECM (rare).

Symptoms

  • Check Engine Light ON.
  • Reduced engine performance.
  • Rough idle.
  • Poor acceleration.
  • Increased fuel consumption.

Electrical Wiring Diagram

              Battery (+12V)
                    |
                 Fuse / Relay
                    |
                    |
        Exhaust VVT Solenoid
              (Bank 2)
                    |
                    |
          Control Signal Wire
                    |
                    |
                 ECM / PCM
                    |
                 Ground Control

Estimated Repair Cost

Typical repair cost ranges from $30 - $300, depending on whether the issue requires wiring repair or replacement of the exhaust VVT solenoid.

Severity

Moderate. The vehicle may continue to run, but ignoring the issue can affect engine performance and variable valve timing operation.

Recommended Fix

Inspect the exhaust VVT solenoid connector and wiring, check for short circuits, test solenoid resistance, repair damaged wiring, replace the solenoid if needed, clear the trouble code, and verify the repair.

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