Engine

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

Severity: medium Drive with care, to a shop

What P0080 means

The engine control module drives a solenoid that adjusts exhaust valve timing on bank 1 and monitors the voltage in its circuit. P0080 sets when that voltage is higher than expected, typically from a short to power, an open circuit, a failed solenoid or a faulty driver in the module. Valve timing control is then unreliable.

Symptoms

  • Check Engine light on
  • Reduced power
  • Hesitation or poor acceleration
  • Rough idle
  • Higher fuel consumption
  • Possible limp mode

Possible causes

  1. Failed exhaust valve control (timing) solenoid
  2. Open circuit or short to power in the solenoid wiring
  3. Poor connection or corroded terminals
  4. Damaged harness near the engine (chafing, oil, heat)
  5. Faulty ECM/PCM driver circuit

How to diagnose

  1. Read all codes and freeze frame data, clear the code and see if it returns
  2. Inspect the solenoid connector and harness for oil, corrosion, chafing or heat damage
  3. Check engine oil level and condition, since valve timing depends on oil pressure
  4. Measure the solenoid coil resistance and compare it to the spec for your engine
  5. Test the power and control wires for opens and shorts to voltage or ground
  6. Command the solenoid with a scan tool and confirm it operates
  7. If wiring and solenoid are good, test the ECM and check for software updates

Common fixes

  • Replace the valve timing control solenoid
  • Repair or replace damaged wiring or connectors
  • Change the oil and filter if dirty or the wrong grade
  • Diagnose, repair or reprogram the ECM

Questions and answers

What does P0080 mean?

The ECM found the voltage in the bank 1 exhaust valve control solenoid circuit too high. The usual culprits are wiring, a connector or the solenoid itself.

Can I drive with P0080?

For a short time, if the engine runs smoothly. But power loss or limp mode is possible, so have it diagnosed soon.

How do I fix P0080?

Start by inspecting the solenoid wiring and connector, then check the oil and the coil resistance. If those are fine, replace the solenoid, and test the ECM last.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.