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
P0301 Cylinder 1 Misfire Detected High
The P0301 code means the computer detected failed combustions concentrated in cylinder number one. Because the problem is limited to a single cylinder, the cause is usually a specific component: its spark plug, its coil, its injector or its compression. A swap test lets you identify it without buying parts.