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
- $60 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
P0409 Exhaust Gas Recirculation Sensor A Circuit Medium
The P0409 code means the computer found an electrical fault in the circuit of EGR valve position sensor A. The main effect is that the EGR is switched off, with possible pinging and higher emissions. Start with the fuse, the relay and the connector before you replace anything.