Multi-code OBD2 diagnosis
Enter all the codes your scanner showed, not just the first one. We give you the overall severity, whether you can keep driving, the order in which to check them and how they relate to each other.
Summary
- Overall severity
- Low
- Can I keep driving?
- Yes, no immediate risk
- Estimated cost
- $30 to $250
- Codes analyzed
- 1 of 1
The order below is the recommended one: first the codes that can cause the others. After each repair, clear the codes and check which ones come back.
Order of inspection
P0499 Evaporative Emission System Vent Control Circuit High Low
The P0499 code indicates high voltage in the EVAP vent valve control circuit, from an open circuit or a short to voltage. Check the fuse, relay, connector and wiring before replacing the valve. The code usually does not affect driving.