P0155 - O2 Sensor Heater Circuit (Bank 2 Sensor 1)

DTC DESCRIPTION P0155 - O2 SENSOR HEATER CIRCUIT (BANK 2 SENSOR 1)

Description:	This DTC sets when an open or short circuit is detected or the universal heated oxygen sensor bank 2, sensor 1 (HO2S21) heater current draw exceeds a calibrated limit.
Possible Causes:	UO2SHTR21 circuit open UO2SHTR21 circuit short to voltage VPWR circuit open Low battery voltage Water in the harness connector Corrosion Incorrect connections Damaged universal HO2S21 heater
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 DZ.