What Does P0081 Mean?
The ECM has detected a general malfunction in the intake valve control solenoid circuit on bank 2 (the cylinder bank that does not contain cylinder #1). This solenoid is part of the variable valve timing (VVT) system and controls oil flow to the intake camshaft phaser. The driver may notice rough idle, reduced power, poor fuel economy, or a check engine light.
Common Causes
35%
Faulty intake VVT solenoid (oil control valve) on bank 2
25%
Wiring harness damage, corroded connector, or broken pins at the VVT solenoid
20%
Sludged or restricted oil passages to the camshaft phaser
12%
Failed camshaft phaser assembly on bank 2 intake
8%
ECM driver circuit failure or ground issue
Diagnostic Steps
1
Check freeze frame data for RPM, load, and oil temperature conditions when the code set. Verify engine oil level and condition — sludgy or low oil is a primary contributor to VVT solenoid failures.
2
Unplug the bank 2 intake VVT solenoid connector and measure solenoid resistance with a multimeter. Typical spec is 6.9–7.9 ohms at room temperature; out-of-range readings indicate a failed solenoid.
3
With the solenoid disconnected, check for battery voltage on the power supply wire (key on) and verify the ECM provides a proper ground/PWM signal using a lab scope or DVOM on duty cycle mode.
4
Inspect the wiring harness from the ECM to the solenoid for chafing, corrosion, or breaks. Wiggle-test the harness while monitoring the solenoid command PID for intermittent faults.
5
Remove the VVT solenoid and inspect the mesh screen filter for debris or sludge buildup. A clogged screen restricts oil flow and causes erratic solenoid operation.
6
If the solenoid and wiring test good, command the solenoid on/off with a scan tool while monitoring intake cam advance angle PID. If the phaser does not respond, suspect a stuck or damaged phaser assembly.
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The ECM has detected a general malfunction in the intake valve control solenoid circuit on bank 2 (the cylinder bank that does not contain cylinder #1). This solenoid is part of the variable valve timing (VVT) system and controls oil flow to the intake camshaft phaser. The driver may notice rough id...
The most common cause of P0081 (Intake valve Control Solenoid Circuit (Bank 2)) is: Faulty intake VVT solenoid (oil control valve) on bank 2
Typical repair costs for P0081 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Generally safe to drive short distances. The engine may run rough, have reduced power, or experience poor fuel economy. Prolonged driving risks increased emissions and potential timing-related engine damage if the phaser locks in an extreme position.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0081 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing (VVT)
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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