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?
- Yes, but with caution
- Estimated cost
- $20 to $400
- 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
P1399 Random Misfire Detected (Honda) High
On Honda and Acura, the P1399 code means random misfires were detected. The engine shakes at idle. On many VTEC Hondas the typical cause is valve lash that is out of adjustment.