P0081 – Intake Valve Control Solenoid Circuit Low (Bank 2)

Description

The P0081 trouble code indicates that the Engine Control Module (ECM) has detected a low voltage condition in the intake valve control solenoid circuit on Bank 2. The intake VVT solenoid controls oil flow to the variable valve timing system, allowing the engine to adjust intake valve timing for better performance, fuel economy, and emissions control.

Common Causes

• Faulty intake VVT control solenoid.
• Short circuit to ground.
• Damaged wiring or electrical connector.
• Corroded terminals.
• Low engine oil level or poor oil condition.
• Faulty ECM (rare).

Symptoms

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

Electrical Wiring Diagram

              ECM / PCM
                 |
                 |
        Control Signal Wire
                 |
                 |
        +----------------+
        | Intake VVT     |
        | Solenoid       |
        | (Bank 2)       |
        +----------------+
                 |
                 |
            Ground (-)
                 |
              Engine GND


       Battery (+12V)
            |
         Fuse / Relay
            |
       VVT Solenoid Power

Estimated Repair Cost

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

Severity

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

Recommended Fix

Inspect the intake VVT solenoid connector and wiring, test the solenoid resistance, check power and ground circuits, repair damaged wiring, replace the solenoid if necessary, then clear the code and confirm the repair.