P0036

CIRCUIT DESCRIPTION
The heating elements inside the heated oxygen sensors (HO2S) minimize the time required for the sensors to reach operating temperature, and then provide an accurate voltage signal. The powertrain control module (PCM) controls the HO2S heater operation with a low side driver. The HO2S bank 1 sensor 2 heater diagnostic monitors the current draw through the HO2S low side driver. The sensor receives power from a fused ignition 1 voltage circuit. If the PCM detects that the HO2S bank 1 sensor 2 heater low control circuit condition is incorrect, DTC P0036 will set.

CONDITIONS FOR RUNNING THE DTC
- The system voltage is between 9-18 volts.
- The ignition is ON.

CONDITIONS FOR SETTING THE DTC
The PCM detects an incorrect circuit condition for the commanded state of the low side driver.

ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.

TEST

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Steps 14-15: