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
- High
- Can I keep driving?
- No, stop and have it checked
- Estimated cost
- $40 to $800
- 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
P0300 Random/Multiple Cylinder Misfire Detected High
The P0300 code means the computer detected misfires spread across several cylinders and could not pin them on a single one. That points to a cause common to the whole engine: ignition, fuel mixture, compression or timing. If the check engine light is flashing, stop driving, because the unburned fuel is destroying the catalytic converter.