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
- Medium
- Can I keep driving?
- Yes, no immediate risk
- Estimated cost
- $40 to $450
- 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
P1491 EGR Valve Insufficient Lift (Honda) Medium
On Honda and Acura vehicles, the P1491 code means the EGR valve is not lifting far enough. You may notice hesitation or light pinging under load. On other brands the same number means something else.