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
P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1) Medium
The P0155 code means the circuit that powers the heater of the upstream oxygen sensor on bank 2 is not responding as expected. It only appears on V-type and horizontally opposed engines. The diagnosis is the same as on bank 1, with one advantage: the sensor on the other bank works as a direct reference.