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 $250
- 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
P2271 O2 Sensor Signal Stuck Rich (Bank 1 Sensor 2) Medium
The P2271 code means the oxygen sensor on bank 1, behind the catalytic converter, stayed reading rich and did not react when the computer changed the mixture on purpose. It is usually a contaminated sensor, a signal wire shorted to voltage or a mixture that really is rich. Most of the time you will not notice any driving symptom, but it can keep you from passing an inspection.