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
- $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
P0037 HO2S Heater Control Circuit Low (Bank 1 Sensor 2) Low
The P0037 code means the heater circuit of the oxygen sensor behind the catalytic converter shows lower voltage than the computer expects. The diagnosis is the same as for P0031, but because this sensor hangs under the vehicle, exposed to water, salt and road debris, its wiring and connector cause a bigger share of the cases than they do on the upstream sensor.