2006 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

DTC P0032: Notes

DTC P0032 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0032 HO2S heater (Front, RH) circuit high
DETECTION CONDITION 
  • The PCM monitors the HO2S heater (Front, RH) control signal at PCM terminal 83. If the PCM turns the front heater (RH) on but front heater (RH) circuit remains high voltage, the PCM determines that the HO2S heater (Front, RH) circuit has malfunction.
NOTE:
  • The HO2S heater (Front, RH) is controlled by a duty signal.

Diagnostic support note 

  • This is a continuous monitor (HO2S heater)(1).
  • This is an intermittent monitor (HO2S heater)(2).
  • The MIL 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 the first drive cycle.
  • FREEZE FRAME DATA is available.
  • DTC is stored in PCM memory.
POSSIBLE CAUSE 
  • HO2S heater (Front, RH) malfunction
  • Connector or terminal malfunction
  • Short to power circuit between HO2S (Front, RH) terminal D and PCM terminal 83
  • PCM malfunction
G04327899Courtesy of MAZDA MOTORS CORP.
(1) With rear HO2S model

(2) Without rear HO2S model
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