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
- $10 to $300
- Codes analyzed
- 1 of 1
How your codes relate
- EVAP codes do not affect how the engine runs. Start with the fuel cap (it is free) and leave the smoke test for last.
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
P0442 Evaporative Emission Control System Leak Detected (Small Leak) Low
The P0442 code means the system that collects fuel vapors from the tank could not hold pressure or vacuum during the leak test. A small leak, about half a millimeter across, is enough to set the code. The gas cap is responsible for a good share of cases, and fixing it costs very little.