California Emission Regulation Applicable ATX Model: Notes

DTC P0032 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0032	Front HO2S heater circuit high input
DETECTION CONDITION	The PCM monitors the front HO2S heater control voltage when the PCM turns the front HO2S heater on. If the control voltage is less than 50%  of the battery voltage, the PCM determines that the front HO2S (heater control circuit voltage is high. Diagnostic support note  This is a continuous monitor (HO2S heater). MIL illuminates if PCM detects above malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for the same malfunction has been stored in PCM. PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle. FREEZE FRAME DATA is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	Front HO2S heater malfunction Connector or terminal malfunction Open circuit in wiring harness between ignition switch and front HO2S terminal D Short to GND in wiring harness between ignition switch and front HO2S terminal D Open circuit in wiring harness between front HO2S terminal C and PCM terminal 2BG Short to GND in wiring harness between front HO2S terminal C and PCM terminal 2BG PCM malfunction
Courtesy of MAZDA MOTORS CORP.