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
P0166 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 3) Low
The P0166 code means the bank 2 sensor 3 oxygen sensor puts out no signal and sits fixed at about 0.45 V. It is usually a worn-out sensor, an open circuit or a heater that is not working.