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
- $30 to $700
- 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
P0303 Cylinder 3 Misfire Detected High
The P0303 code means the misfires are concentrated in cylinder number three. Like every other single-cylinder code, it points to an individual component and not to a general engine problem. The diagnosis is settled by swapping parts between cylinders before you buy anything.