DTC P0133:00 [SKYACTIV-D 2.2]

DTC P0133:00	A/F sensor circuit no activity detected
DETECTION CONDITION	• The PCM monitors the A/F sensor impedance when the following conditions are met. If the impedance is more than threshold (40 Ω (cold), 100 Ω (hot)) for 5 s, the PCM determines that A/F sensor is not activated. MONITORING CONDITIONS ― Battery voltage: 11—16 V ― Ignition switched ON (engine on) ― A/F sensor feedback correction is actuated Diagnostic support note • This is a continuous monitor (A/F sensor). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA (Mode 2)/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• PCM restricts engine torque. • Inhibits the EGR control. • Inhibits the diesel particulate filter regeneration control. • Inhibits engine-stop by operating the i-stop function.
POSSIBLE CAUSE	• A/F sensor heater malfunction • Erratic signal from A/F sensor ― A/F sensor connector or terminals malfunction ― A/F sensor loose ― Exhaust system leakage • A/F sensor malfunction ― A/F sensor deterioration • PCM malfunction
SYSTEM WIRING DIAGRAM	Not applicable

DTC P0133:00

A/F sensor circuit no activity detected

DETECTION CONDITION

• The PCM monitors the A/F sensor impedance when the following conditions are met. If the impedance is more than threshold (40 Ω (cold), 100 Ω (hot)) for 5 s, the PCM determines that A/F sensor is not activated.

MONITORING CONDITIONS

― Battery voltage: 11—16 V

― Ignition switched ON (engine on)

― A/F sensor feedback correction is actuated

Diagnostic support note

• This is a continuous monitor (A/F sensor).

• The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.

• DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

• PCM restricts engine torque.

• Inhibits the EGR control.

• Inhibits the diesel particulate filter regeneration control.

• Inhibits engine-stop by operating the i-stop function.

POSSIBLE CAUSE

• A/F sensor heater malfunction

• Erratic signal from A/F sensor

― A/F sensor connector or terminals malfunction

― A/F sensor loose

― Exhaust system leakage

• A/F sensor malfunction

― A/F sensor deterioration

• PCM malfunction

SYSTEM WIRING DIAGRAM

Not applicable

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 [SKYACTIV-D 2.2].) • 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-D 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.
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.
No	Go to the next step.
4	VERIFY RELATED PENDING CODE AND/OR DTC • Switch the ignition off, then ON (engine off). • Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Are any other PENDING CODEs and/or DTCs present?	Yes	Go to the applicable PENDING CODE or DTC inspection. (See DTC TABLE [SKYACTIV-D 2.2].)
No	Go to the next step.
5	INSPECT A/F SENSOR HEATER • Inspect the A/F sensor heater. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Replace the A/F sensor, then go to Step 10. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No	Go to the next step.
6	INSPECT A/F SENSOR CONNECTOR CONDITION • Switch the ignition 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 10.
No	Go to the next step.
7	INSPECT CURRENT SIGNAL STATUS OF A/F SENSOR • Reconnect all disconnected connectors. • Inspect the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Go to the next step.
No	Go to Step 10.
8	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 10. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
9	INSPECT EXHAUST SYSTEM FOR LEAKAGE • Visually inspect for exhaust system. • Is there any leakage?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to the next step.
No	Inspect the related wiring harness. • If there is any malfunction: ― Repair or replace the suspected wiring harness, then go to the next step. • If there is no malfunction: ― Replace the A/F sensor, then go to the next step. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
10	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].) • Perform the Drive Mode Type A. (See OBD DRIVE MODE [SKYACTIV-D 2.2].) • Perform the DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to the next step.
No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 2.2].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2)

• Perform the Freeze Frame PID Data Access Procedure.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

• Is the DTC P0133:00 on FREEZE FRAME DATA (Mode 2)?

Yes

Go to the next step.

Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA (Mode 2).

(See DTC TABLE [SKYACTIV-D 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.

Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then go to the next step.

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.

Go to the next step.

VERIFY RELATED PENDING CODE AND/OR DTC

• Switch the ignition off, then ON (engine off).

• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

• Are any other PENDING CODEs and/or DTCs present?

Yes

Go to the applicable PENDING CODE or DTC inspection.

(See DTC TABLE [SKYACTIV-D 2.2].)

Go to the next step.

INSPECT A/F SENSOR HEATER

• Inspect the A/F sensor heater.

(See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-D 2.2].)

• Is there any malfunction?

Yes

Replace the A/F sensor, then go to Step 10.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Go to the next step.

INSPECT A/F SENSOR CONNECTOR CONDITION

• Switch the ignition 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 10.

Go to the next step.

INSPECT CURRENT SIGNAL STATUS OF A/F SENSOR

• Reconnect all disconnected connectors.

• Inspect the A/F sensor.

(See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-D 2.2].)

• Is there any malfunction?

Yes

Go to the next step.

Go to Step 10.

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.

Retighten the A/F sensor, then go to Step 10.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

INSPECT EXHAUST SYSTEM FOR LEAKAGE

• Visually inspect for exhaust system.

• Is there any leakage?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to the next step.

Inspect the related wiring harness.

• If there is any malfunction:

― Repair or replace the suspected wiring harness, then go to the next step.

• If there is no malfunction:

― Replace the A/F sensor, then go to the next step.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

VERIFY DTC TROUBLESHOOTING COMPLETED

• Always reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

(See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].)

• Perform the Drive Mode Type A.

(See OBD DRIVE MODE [SKYACTIV-D 2.2].)

• Perform the DTC Reading Procedure.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

• Is the same DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the “AFTER REPAIR PROCEDURE”.

(See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-D 2.2].)

DTC troubleshooting completed.