Mazda 3 - Dtc P0032 [Lf]

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
(See AFTER REPAIR PROCEDURE [LF].)
• Is there any DTC present?
Yes
Go to the applicable DTC troubleshooting.
(See DTC TABLE [LF].)
No
Troubleshooting completed.
DTC P0032 [LF]
B3E010201084W02
DTC P0032
Front HO2S heater circuit high input
DETECTION
CONDITION
• The PCM monitors the front HO2S heater control signal at PCM terminal
2G. If the PCM turns the front HO2S heater on but the front HO2S heater
circuit has high voltage, PCM determines that front HO2S heater circuit has
malfunction.
Note
• Front HO2S heater is controlled by a duty signal.
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.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
POSSIBLE CAUSE
• Short to power supply in wiring harness between front HO2S terminal D
and PCM terminal 2G
• Short circuit in front HO2S or PCM terminal
• Front HO2S heater malfunction
• PCM malfunction