DTC P0133:00 [SKYACTIV-G 2.0, SKYACTIV-G 2.5]

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Details On DTCs

DESCRIPTION	A/F sensor circuit slow response
DETECTION CONDITION	Determination conditions	•  The response speed of the A/F sensor input signal when the air/fuel ratio is fluctuated is slow.
	Preconditions	•  Engine speed: Within specified range •  Charging efficiency: Within specified range •  Engine coolant temperature: Specified value or more •  Mass airflow: Within specified range •  The following DTCs are not detected ―  A/F sensor heater: P0031:00, P0032:00 ―  ECT sensor: P0117:00, P0118:00 ―  VSS signal: P0500:00 ―  Misfire: P0300:00, P0301:00, P0302:00, P0303:00, P0304:00 ―  Fuel injection correction: P0171:00, P0172:00, P2096:00, P2097:00
	Drive cycle	•  2
	Self test type	•  CMDTC self test
	Sensor used	•  A/F sensor
FAIL-SAFE FUNCTION	•  Not applicable.
VEHICLE STATUS WHEN DTCs ARE OUTPUT	•  Illuminates the check engine light
POSSIBLE CAUSE	•  A/F sensor signal malfunction ―  A/F sensor connector or terminals malfunction ―  A/F sensor loose ―  Exhaust system leakage •  A/F sensor deterioration •  PCM malfunction

System Wiring Diagram

Function Explanation (DTC Detection Outline)

•  The PCM detects the oxygen concentration in the exhaust gas based on the A/F sensor signal. By intentionally increasing/decreasing the fuel injection amount, the PCM controls the oxygen concentration in the exhaust gas to rich or lean and monitors the response speed of the A/F sensor to sudden changes in the oxygen concentration. If the response speed of the signal input from the A/F sensor is slow while switching repeatedly between rich and lean, the PCM determines an A/F sensor malfunction and stores a DTC.

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Repeatability Verification Procedure

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PID Item/Simulation Item Used In Diagnosis

PID/DATA monitor item table

Function Inspection Using M-MDS

STEP	INSPECTION	RESULTS	ACTION
1	PURPOSE: 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.
2	PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2) •  Is the DTC P0133:00 on FREEZE FRAME DATA (Mode 2)?	Yes	Go to the next step.
		No	Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA (Mode 2). (See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
3	PURPOSE: RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION •  Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?	Yes	Go to the next step.
		No	Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then go to the next step. Note •  Recording can be facilitated using the screen capture function of the PC.
4	PURPOSE: VERIFY IF DIAGNOSTIC RESULT IS AFFECTED BY DTC OCCURRING FROM A/F SENSOR UNIT •  Switch the ignition to off, then to ON (engine off or on). •  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) •  Is the PENDING CODE/DTC P0131:00, P0132:00, P0134:00, P2237:00, P2243:00 or P2251:00 also present?	Yes	Go to the applicable DTC inspection. (See DTC P0131:00 [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See DTC P0132:00 [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See DTC P0134:00 [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See DTC P2237:00 [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See DTC P2243:00 [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See DTC P2251:00 [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
		No	Go to the next step.
5	PURPOSE: VERIFY DTC •  Retrieve the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5]) •  Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5])
		No	Go to the next step.
6	PURPOSE: VERIFY A/F SENSOR •  Start the engine and idle it. •  Access the O2S11 PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) •  Is the O2S11 PID value normal?	Yes	Go to the next step.
		No	Go to the troubleshooting procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure

―  Perform inspection of A/F sensor signal related parts.

―  Verify that primary malfunction is resolved and there are no other malfunctions.

STEP	INSPECTION	RESULTS	ACTION
1	PURPOSE: INSPECT A/F SENSOR CONNECTOR CONDITION •  Switch the ignition to off. •  Disconnect the A/F sensor connector. •  Inspect for poor connection (such as damaged/pulled-out pins, corrosion). •  Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 16.
		No	Go to the next step.
2	PURPOSE: INSPECT INSTALLATION OF A/F SENSOR •  Inspect installation of A/F sensor. •  Is the A/F sensor installed securely?	Yes	Go to the next step.
		No	Retighten the A/F sensor, then go to Step 16. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
3	PURPOSE: VERIFY IF MALFUNCTION RELATED TO EMISSION SYSTEM AFFECTS A/F SENSOR SIGNAL •  Verify the exhaust gas leakage from the exhaust system. (between A/F sensor and HO2S) •  Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 16.
		No	Go to the next step.
4	PURPOSE: DETERMINE INTEGRITY OF A/F SENSOR •  Reconnect all disconnected connectors. •  Inspect the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) •  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 [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
		No	Go to the next step.
5	PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION •  Make sure to reconnect all disconnected connectors. •  Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) •  Implement the repeatability verification procedure. (See Repeatability Verification Procedure.) •  Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) •  Is the PENDING CODE for this DTC present?	Yes	Repeat the inspection from Step 1. •  If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) Go to the next step.
		No	Go to the next step.
6	PURPOSE: VERIFY IF THERE IS ANY OTHER MALFUNCTION •  Is any other DTC or pending code stored?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
		No	DTC troubleshooting completed.