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, but with caution
- Estimated cost
- $50 to $500
- 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
P0131 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1) Medium
The P0131 code means the upstream oxygen sensor signal is stuck at low values, which is the same as lots of oxygen in the exhaust. Before you replace the sensor, check whether it is reporting a real lean mixture or whether an exhaust leak is feeding it air.