DTC P0133:00 [MZR 2.0, MZR 2.5]

id0102g3702400

DTC P0133:00

A/F sensor circuit slow response
DETECTION CONDITION
•  The PCM monitors the A/F sensor terminal D current slow response while the A/F fluctuation being provided when following monitoring conditions are met. If the average value of slow response is more than specified value, the PCM determine that the A/F sensor has a deterioration.
MONITORING CONDITIONS
―  Drive Mode 03 (A/F sensor heater, HO2S heater, A/F sensor, HO2S and TWC Repair Verification Drive Mode)
―  Following conditions are met:
•  A/F sensor heater monitor is completed.
•  Fuel system loop status is closed loop fuel control.
―  ECT sensor and A/F sensor heater are normal
―  Engine speed: 1,200—3,500 rpm
―  Charging efficiency: 16—63%
―  Intake airflow amount: 5—40 g/s {0.7—5.2 lb/min}
―  Engine coolant temperature: above 60 °C {140 °F}
Diagnostic support note
•  This is an intermittent monitor (A/F sensor, HO2S).
•  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 first drive cycle.
•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  A/F sensor malfunction
―  A/F sensor looseness
―  Leakage exhaust system
•  Purge solenoid valve malfunction
―  Improper connection evaporative hose (purge solenoid valve side)
•  Fuel supply system malfunction or improper fuel line pressure
―  Fuel leakage in fuel line from fuel distributor to fuel pump
―  Clogged or restricted fuel filter (built-in fuel pump unit)
―  Pressure regulator malfunction (built-in fuel pump unit)
―  Fuel pump unit malfunction
•  Engine malfunction
―  Leakage engine coolant
―  Insufficient engine compression
•  A/F sensor malfunction
―  A/F sensor related wiring harness malfunction
―  A/F sensor deterioration
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2)
•  Perform the Freeze Frame PID Data Access Procedure.
•  Is the DTC P0133:00 on FREEZE FRAME DATA (Mode 2)?
Yes
Go to the next step.
No
Go to the troubleshooting procedures for DTC on FREEZE FRAME DATA (Mode 2).
(See DTC TABLE [MZR 2.0, MZR 2.5].)
2
VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED
•  Have the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (A/F sensor, HO2S related) been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS on repair order, then go to the next step.
3
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
4
VERIFY RELATED PENDING CODE AND STORED DTC
•  Switch the ignition to off, then to ON (engine off).
•  Perform the Pending Trouble Code Access Procedure.
•  Is the DTC P0443:00 also present?
Yes
Go to the applicable DTC inspection.
(See DTC P0443:00 [MZR 2.0, MZR 2.5].)
No
Go to the next step.
5
INSPECT INSTALLATION OF A/F SENSOR
•  Inspect if the A/F sensor is loosely installed.
•  Is the A/F sensor installed securely?
Yes
Go to the next step.
No
Retighten the A/F sensor, then go to Step 13.
(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)
6
INSPECT GAS LEAKAGE FROM EXHAUST SYSTEM
•  Visually inspect if there is any gas leakage between the exhaust manifold and A/F sensor.
•  Is there gas leakage?
Yes
Repair or replace the malfunctioning part according to the inspection result, then go to Step 13.
No
Go to the next step.
7
INSPECT PURGE SOLENOID VALVE AND EVAPORATIVE HOSE
•  Inspect the purge solenoid valve and evaporative hose connection.
•  Are the purge solenoid valve and evaporative hose normal?
Yes
Go to the next step.
No
Replace the purge solenoid valve, then go to Step 13.
(See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)
8
INSPECT FUEL LINE PRESSURE
•  Switch the ignition to off.
Note
•  If engine will not start, inspect fuel line pressure with ignition is switched to ON.
•  Inspect fuel line pressure while engine running.
•  Is there any malfunction?
Yes
Go to the next step.
No
Go to Step 10.
9
INSPECT FUEL LINE LEAKAGE
•  Visually inspect the leakage from fuel line between fuel distributor and fuel pump unit.
•  Is there any leakage?
Yes
Repair or replace the malfunctioning part according to the inspection result, then go to Step 13.
No
Inspect fuel filters for following:
•  Foreign material or stain inside fuel filter (low-pressure side)
Perform the following actions depend on the result above.
•  If foreign materials or stain is found inside fuel filter (low-pressure side):
―  Clean the fuel tank and filter (low-pressure side).
•  If normal:
―  Replace the fuel pump unit.
Go to Step 13.
10
INSPECT SEALING OF ENGINE COOLANT PASSAGE
•  Perform the “ENGINE COOLANT LEAKAGE INSPECTION”.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection result, then go to Step 13.
No
Go to the next step.
11
INSPECT ENGINE COMPRESSION
•  Inspect the engine compression.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning parts according to the inspection results, then go to Step 13.
No
Go to the next step.
12
INSPECT A/F SENSOR
•  Inspect the A/F sensor.
•  Is there any malfunction?
Yes
Inspect the related wiring harness.
•  If there is a malfunction:
―  Repair or replace the malfunctioning wiring harness.
•  If there is no malfunction:
―  Replace the A/F sensor.
Go to the next step.
No
Go to the next step.
13
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Drive the vehicle under the monitoring conditions.
•  Perform the Drive Mode 03 (A/F sensor heater, HO2S heater, A/F sensor, HO2S and TWC Repair Verification Drive Mode).
•  Is the PENDING CODE for this DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
14
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR 2.0, MZR 2.5].)
No
DTC troubleshooting completed.