DTC P0032-00: A/F Sensor Heater Control Circuit High Input: Notes

DTC P0032:00 DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0032:00	A/F sensor heater control circuit high input
DETECTION CONDITION	The PCM monitors the A/F sensor heater output voltage. If the PCM turns the A/F sensor heater on but the A/F sensor heater circuit remains high voltage, the PCM determines that the A/F sensor heater circuit has a malfunction. Diagnostic support note This is a continuous monitor (A/F sensor heater, HO2S heater). The check engine light illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. The DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Stops the fuel feedback control.
POSSIBLE CAUSE	A/F sensor connector or terminals malfunction A/F sensor heater malfunction PCM connector or terminals malfunction Short to power supply in wiring harness between A/F sensor terminal 2D and PCM terminal 2A PCM malfunction
Courtesy of MAZDA MOTORS CORP.