P1172

Lambda Control Adaption Fault Bank 1.

P1172 - Lambda control adaption fault bank 1.: Last occurrence - minimum signal

Possible causes:
1. Air leak to inlet bank 1.
2. Air leak to exhaust bank 1.

1. Air leak to inlet bank 1.
- The ECM is unable to maintain the lambda correction.
- Check for air leak paths into the exhaust before the rear O2 sensor.
- Check for air leak paths into the inlet manifold after the air mass flow meter.

2. Air leak to exhaust bank 1.
- The ECM is unable to maintain the lambda correction.
- Check for air leak paths into the exhaust before the rear O2 sensor.
- Check for air leak paths into the inlet manifold after the air mass flow meter.