P0499
EVAP System Vent Valve Control Circuit High
P0499 is an OBD-II diagnostic trouble code meaning: EVAP System Vent Valve Control Circuit High. Common causes: short circuit in the valve circuit to +12v, open circuit in valve control circuit. Estimated repair cost: $33–89.
Symptoms
- Check Engine Light Is On
- Poor engine performance at idle
- Increased fuel consumption
- Unstable engine operation
Causes
- Short circuit in the valve circuit to +12V
- Open circuit in valve control circuit
- Purge solenoid valve malfunction
- Problems in the wiring harness
- Engine ECU malfunction
How to Fix
- Check the integrity of the wiring harness to the valve
- Measure the valve resistance (should be between 20-50 Ohms)
- Check the voltage at the valve connector with the ignition on
- Check the circuit for a short circuit to ground or +12V
- If necessary, replace the EVAP purge valve
Related codes
Error P0499 by Vehicle Brand
FAQ
What does the P0499 code mean?
P0499 is an OBD-II diagnostic trouble code that indicates: EVAP System Vent Valve Control Circuit High
What causes a P0499 error code?
The most common causes of P0499 include: Short circuit in the valve circuit to +12V; Open circuit in valve control circuit; Purge solenoid valve malfunction; Problems in the wiring harness.
How do I fix a P0499 diagnostic trouble code?
To fix P0499: Check the integrity of the wiring harness to the valve. Measure the valve resistance (should be between 20-50 Ohms). Check the voltage at the valve connector with the ignition on. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0499?
Limited driving only, diagnose soon
How much does it cost to fix P0499?
The estimated repair cost for P0499 is $33–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat