P0080 – Exhaust Valve Control Solenoid Circuit High (Bank 1)

Description

The P0080 trouble code indicates that the Engine Control Module (ECM) has detected a high voltage condition in the exhaust valve control solenoid circuit on Bank 1. This solenoid is part of the Variable Valve Timing (VVT) system and controls oil flow to adjust exhaust valve timing.

Common Causes

• Faulty exhaust VVT control solenoid.
• Short circuit to battery voltage.
• Damaged wiring or connector.
• Corroded electrical terminals.
• Faulty ECM (rare).

Symptoms

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

Electrical Wiring Diagram

              ECM / PCM
                 |
                 |
       Control Signal Wire
                 |
                 |
        +----------------+
        | Exhaust VVT    |
        | Solenoid       |
        | (Bank 1)       |
        +----------------+
                 |
                 |
          Battery Voltage
              (+12V)
                 |
              Fuse / Relay
                 |
              Battery +

Estimated Repair Cost

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

Severity

Moderate. The vehicle may run, but continued driving can affect engine performance and VVT system operation.

Recommended Fix

Inspect the exhaust VVT solenoid connector and wiring, check for voltage shorts, test the solenoid resistance, repair damaged wiring, replace the solenoid if needed, then clear the code and verify the repair.