DTC P0051 Or DTC P0052: Condition

DTC P0051 is set when Bank 2 HO2S No. 1 heater current is less than .09 amps, or potential difference between heater positive and negative terminals is more than 13.99 volts while HO2S heater is on. MIL is illuminated when Engine Control Module (ECM) detects malfunction during 2 consecutive drive cycles.

DTC P0052 is set when Bank 2 HO2S No. 1 heater current is more than 5.32 amps, or potential difference between heater positive and negative terminals is less than 11.95 volts while HO2S heater is on. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles.