P2271

The signal from oxygen sensor 2 (cylinder bank 1) is shifted towards 'Rich'.


Possible cause:

- The signal of the oxygen sensor upstream of the catalytic converter of the left cylinder bank is shifted towards 'Lean'.
Affected functions:

- Engine diagnosis
- Exhaust system

-------------------------------------------------

Test 1: Check exhaust system for leaks.

1. Check exhaust system for leaks.
Warning!Communication with ECU required.