Dtc P0038 [Z6] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
DTC P0038
DETECTION
CONDITION
POSSIBLE CAUSE
Downloaded from

DTC P0038 [Z6]

Rear HO2S heater control circuit high
• The PCM monitors the rear HO2S heater control voltage at PCM terminal
2AT. If the PCM turns the rear HO2S heater on but the rear HO2S heater
circuit has high voltage, the PCM determines that the rear HO2S heater
circuit has a malfunction.
Diagnostic support note
• This is a continuous monitor (HO2S heater).
• 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.
• The DTC is stored in the PCM memory.
• Short to power supply in wiring harness between rear HO2S terminal D and
PCM terminal 2AT
• Short circuit in rear HO2S or PCM terminal
• Rear HO2S heater malfunction
• PCM malfunction
https://carmanualshub.com/ - automotive repair manuals website
B3E010200001W06