P1491
Secondary Switch Solenoid Circuit Malfunction
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Check Engine Light Is On
- Increased fuel consumption
- Problems starting the engine
- Unstable engine idling
- Smell of gasoline in the cabin
Causes
- Open or short circuit in solenoid circuit
- Malfunction of the solenoid itself
- Poor contact in connectors
- Problems with the control module
- Contact corrosion
How to Fix
- Check the continuity of the solenoid circuit
- Check solenoid resistance
- Inspect connectors and contacts for corrosion
- Replace faulty solenoid if necessary
- Reset the error code and check if it returns