P1645
Evaporative Emission Purge Solenoid Output Circuit
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Check Engine light comes on
- Increased fuel consumption
- Unstable engine idling
- Smell of gasoline in the cabin or under the hood
- Dips during acceleration
Causes
- Purge solenoid valve malfunction
- Open or short circuit in valve control circuit
- Oxidation or poor contact in valve connectors
- Valve circuit relay or fuse failure
- Problems with the engine control unit (rare)
How to Fix
- Check purge valve circuit fuse
- Check the resistance and functionality of the purge valve
- Inspect wiring and connectors for damage
- Check the presence of a control signal from the ECU
- Replace faulty purge valve if necessary