Mazda 3 - Dtc P0133 [Lf]

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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310
IDENTIFY TRIGGER DTC FOR FREEZE
FRAME DATA
• Is DTC P0132 on FREEZE FRAME DATA?
No
Go to troubleshooting procedures for DTC
on FREEZE FRAME DATA.
(See DTC TABLE [LF].)
5
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
(Engine off).
• Measure the voltage between front HO2S
terminal A (wiring harness-side) and body
ground.
• Is any voltage reading?
Yes
Replace the wiring harness short to power
supply, then go to Step 7.
No
Go to the next step.
6
VERIFY CURRENT INPUT SIGNAL STATUS
• Start the engine.
• Access O2S12 PID using the WDS or
equivalent.
• Verify PID while racing the engine at least 10
times in NEUTRAL.
• Does PID remain above 0.45 V?
Yes
Repair or replace the sensor, then go to the
next step.
No
Go to the next step.
7
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
WDS or equivalent.
• Run HO2S heater, HO2S, and TWC Repair
Verification Drive Mode.
(See OBD DRIVE MODE [LF].)
• Is the PENDING CODE for this DTC
present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION
[LF].)
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
(See AFTER REPAIR PROCEDURE [LF].)
• Are any DTC present?
Yes
Go to the applicable DTC troubleshooting.
(See DTC TABLE [LF].)
No
Troubleshooting completed.
DTC P0133 [LF]