P0056

Oxygen Sensor Heater Post Cat Bank 2 Open Circuit.

P0056 - Post catalyst oxygen sensor heater bank 2.: Open circuit or No signal.

Possible causes:
1. Connector MS43 ECM C604, Oxy Sensor Post Cat Bank 2 C642, Engine Fusebox C578.
2. Open circuit C578/11 (YG) - C642/3 (YG).
3. Open circuit C604/19 (UY) - C642/4 (UY).
4. Engine compartment fusebox Fuse 3.
5. Oxygen sensor post catalyst bank 2.
6. MS43 ECM.

1. Connector MS43 ECM C604, Oxy Sensor Post Cat Bank 2 C642, Engine Fusebox C578.
CONNECTOR
Check for connector not correctly latched, backed out pins, damaged pins, corroded pins

2. Open circuit C578/11 (YG) - C642/3 (YG).
OPEN_CIRCUIT
Check resistance > 1M Ohms.

3. Open circuit C604/19 (UY) - C642/4 (UY).
OPEN_CIRCUIT
Check resistance > 1M Ohms.

4. Engine compartment fusebox Fuse 3.
No detail available for this fault

5. Oxygen sensor post catalyst bank 2
No detail available for this fault

6. MS43 ECM.
No detail available for this fault