P1801
Variable Intake Air System Control Solenoid Valve 2
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Loss of engine power
- Unstable idling
- Increased fuel consumption
- Check Engine Light Illuminates
- Engine does not reach full power
Causes
- Solenoid valve No. 2 malfunction
- Open or short circuit in control circuit
- Problems with vacuum hoses or connections
- Mechanical failure of the damper drive
- Engine control unit malfunction
How to Fix
- Check valve control circuit integrity
- Test the resistance and operation of valve No. 2
- Inspect vacuum hoses for cracks and air leaks
- Check the intake manifold flap mechanism
- Replace faulty solenoid valve if necessary