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
- $50 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
P0031 HO2S Heater Control Circuit Low (Bank 1 Sensor 1) Medium
The P0031 code means the circuit that powers the heater of the upstream oxygen sensor shows a lower voltage than expected. It is usually caused by an open heater element, a blown fuse or a wire shorted to ground. The engine runs normally, but the system cannot complete its readiness checks.