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
- Low
- Can I keep driving?
- Yes, no immediate risk
- Estimated cost
- $80 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
P2440 Secondary Air Injection System Switching Valve Stuck Open (Bank 1) Low
The P2440 code means the secondary air valve on bank 1 has stuck open, which can let exhaust gas flow back toward the pump and damage it. The car drives normally. You may not pass an emissions inspection until it is fixed.