DTC P0133:00 [MZR-CD 2.2]

id0102f3702400

DTC P0133:00

A/F sensor circuit problem

DETECTION CONDITION

•  The PCM monitors the A/F sensor impedance when the following conditions are met. If the impedance is more than the threshold, the PCM determines that the A/F sensor is not activated.

MONITORING CONDITIONS

―  A/F sensor heater monitor is completed.

―  Fuel system loop status is closed loop fuel control.

―  Battery voltage: 11—16 V

Diagnostic support note

•  The MIL illuminates if the PCM detects the above malfunction condition during the 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 looseness

•  Exhaust system leakage

•  Engine coolant leakage

•  Suction control valve (built-in supply pump) malfunction

•  Fuel leakage in fuel line between fuel distributor and supply pump

•  Clogged or restricted fuel filter

•  A/F sensor malfunction

―  A/F sensor deterioration

•  PCM malfunction

DTC P0133:00	A/F sensor circuit problem
DETECTION CONDITION	• The PCM monitors the A/F sensor impedance when the following conditions are met. If the impedance is more than the threshold, the PCM determines that the A/F sensor is not activated. MONITORING CONDITIONS ― A/F sensor heater monitor is completed. ― Fuel system loop status is closed loop fuel control. ― Battery voltage: 11—16 V Diagnostic support note • The MIL illuminates if the PCM detects the above malfunction condition during the 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 looseness • Exhaust system leakage • Engine coolant leakage • Suction control valve (built-in supply pump) malfunction • Fuel leakage in fuel line between fuel distributor and supply pump • Clogged or restricted fuel filter • A/F sensor 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. (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) • Is the DTC P0133:00 on FREEZE FRAME DATA (Mode 2)?	Yes	Go to the next step.
1		No	Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA (Mode 2). (See DTC TABLE [MZR-CD 2.2].)
2	VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?	Yes	Go to the next step.
2		No	Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the 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.
3		No	Go to the next step.
4	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.
4		No	Retighten the A/F sensor, then go to Step 11. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZR-CD 2.2].)
5	INSPECT GAS LEAKAGE FROM EXHAUST SYSTEM • Visually inspect for the exhaust gas leakage between exhaust manifold and A/F sensor. • Is there any leakage?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 11.
5		No	Go to the next step.
6	INSPECT SEALING OF ENGINE COOLANT PASSAGE • Perform the “ENGINE COOLANT LEAKAGE INSPECTION”. (See ENGINE COOLANT LEAKAGE INSPECTION [MZR-CD 2.2].) • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 11.
6		No	Go to the next step.
7	INSPECT SUCTION CONTROL VALVE • Inspect the suction control valve. (See SUCTION CONTROL VALVE INSPECTION [MZR-CD 2.2].) • Is there any malfunction?	Yes	Replace the supply pump, then go to Step 11. (See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].)
7		No	Go to the next step.
8	INSPECT FUEL LINE FROM SUPPLY PUMP TO FUEL DISTRIBUTOR • Visually inspect the fuel line for any leakage. • Is there any leakage?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 11.
8		No	Go to the next step.
9	INSPECT FUEL LINE FOR CLOGGED • Visually inspect the foreign materials or stain inside fuel filter and fuel tank. (See FUEL FILTER COMPONENT REMOVAL/INSTALLATION [MZR-CD 2.2].) (See FUEL FILTER COMPONENT DISASSEMBLY/ASSEMBLY [MZR-CD 2.2].) • Is there any foreign materials or stain?	Yes	Clean the fuel tank and replace the fuel filter, then go to Step 11. (See FUEL FILTER COMPONENT REMOVAL/INSTALLATION [MZR-CD 2.2].) (See FUEL FILTER COMPONENT DISASSEMBLY/ASSEMBLY [MZR-CD 2.2].)
9		No	Go to the next step.
10	INSPECT A/F SENSOR • Inspect the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION [MZR-CD 2.2].) • Is there any malfunction?	Yes	Replace the A/F sensor, then go to the next step. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZR-CD 2.2].)
10		No	Go to the next step.
11	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) • Perform the Repair Verification Drive Mode. (See OBD DRIVE MODE [MZR-CD 2.2].) • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)
11		No	Go to the next step.
12	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD 2.2].)
12		No	DTC troubleshooting completed.