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 $300
- 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
P0446 Evaporative Emission Control System Vent Control Circuit Low
The P0446 code means the vent valve that lets clean air into the charcoal canister is not responding the way the computer expects. Because the valve sits under the vehicle, dirt, moisture and insects cause a big share of these cases. It is a low severity code and you can keep driving, but it often makes the fuel nozzle shut off at the pump.