P0174

Lambda Regulator Bank 2

P0174 - Lambda control limit bank 2.: Short circuit to V Batt.

Possible causes:
1. Oxygen sensors bank 2.

1. Oxygen sensors bank 2.
CHECK THE FOLLOWING:
- If the heater for this oxygen sensor has a fault recorded for it, this could have affected the operation of the oxygen sensor. Rectify any heater fault first.
- Remove the oxygen sensor and examine the side internal to the exhaust system and the side outside the exhaust system. Both sides of the sensor should be free from contamination. Gas must be able to be absorbed by both sides of the sensor.
- Also check the sensor for any mechanical damage or cracks.

INFORMATION
- Siemens recommend that although only one oxygen sensor may be flagged as faulty, both oxygen sensors for that bank should be replaced as a pair.