Dtc P0133 [Lf] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
IDENTIFY TRIGGER DTC FOR FREEZE
FRAME DATA
• Is DTC P0132 on FREEZE FRAME DATA?
INSPECT FRONT HO2S SIGNAL CIRCUIT
FOR SHORT TO POWER SUPPLY
• Turn the ignition switch off.
• Disconnect the front HO2S connector.
• Turn the ignition switch to the ON position
5
(Engine off).
• Measure the voltage between front HO2S
terminal A (wiring harness-side) and body
ground.
• Is any voltage reading?
VERIFY CURRENT INPUT SIGNAL STATUS
• Start the engine.
• Access O2S12 PID using the WDS or
6 equivalent.
• Verify PID while racing the engine at least 10
times in NEUTRAL.
• Does PID remain above 0.45 V?
VERIFY TROUBLESHOOTING OF DTC
P0132 COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Turn the ignition switch to the ON position
(Engine off).
• Clear the DTC from the memory using the
7
WDS or equivalent.
• Run HO2S heater, HO2S, and TWC Repair
Verification Drive Mode.
(See OBD DRIVE MODE
• Is the PENDING CODE for this DTC
present?
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
8
(See AFTER REPAIR PROCEDURE
• Are any DTC present?
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DTC P0133 [LF]

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Go to troubleshooting procedures for DTC
on FREEZE FRAME DATA.
No
(See DTC TABLE [LF].)
Replace the wiring harness short to power
Yes
supply, then go to Step 7.
No Go to the next step.
Repair or replace the sensor, then go to the
Yes
next step.
No Go to the next step.
Replace the PCM, then go to the next step.
Yes
(See PCM REMOVAL/INSTALLATION
[LF].)
No Go to the next step.
Go to the applicable DTC troubleshooting.
Yes
(See DTC TABLE [LF].)
No Troubleshooting completed.
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