DTC P0056 - Ho2S Heater Control Circuit (Bank 2 Sensor 2)

P0056 - HO2S HEATER CONTROL CIRCUIT (BANK 2 SENSOR 2)

Description:	The PCM controls the heated oxygen sensor bank 2, sensor 2 (HO2S22) heater ON and OFF duty cycle to maintain a calibrated temperature. This DTC sets when the sensor does not warm up to the required temperature in a calibrated amount of time. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm.
Possible Causes:	VPWR circuit open HTR22 circuit open HTR22 circuit short Incorrect connections Damaged or corroded pins Exhaust temperature significantly higher than expected Damaged HO2S22
Diagnostic Aids:	Inspect the connectors for signs of damage, water intrusion or corrosion.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST DW .