DTC P0134:00 [SKYACTIV-D 1.5]

id0102q2702500

DTC P0134:00

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 65 ohms 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 heater feedback control: Being performed

―  The following DTCs are not detected:

•  A/F sensor: P0131:00, P0132:00

Diagnostic support note

•  This is an intermittent 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/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  PCM restricts engine torque.

•  Inhibits the auto DPF regeneration control.

•  Inhibits the compulsory DPF regeneration control.

•  Inhibits the EGR control.

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

POSSIBLE CAUSE

•  A/F sensor heater malfunction

•  A/F sensor malfunction

―  A/F sensor connector or terminals malfunction

―  A/F sensor deterioration

―  A/F sensor loose

―  Exhaust system leakage

•  PCM malfunction

SYSTEM WIRING DIAGRAM

Not applicable

DTC P0134:00	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 65 ohms 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 heater feedback control: Being performed ― The following DTCs are not detected: • A/F sensor: P0131:00, P0132:00 Diagnostic support note • This is an intermittent 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/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• PCM restricts engine torque. • Inhibits the auto DPF regeneration control. • Inhibits the compulsory DPF regeneration control. • Inhibits the EGR control. • Inhibits engine-stop by operating the i-stop function.
POSSIBLE CAUSE	• A/F sensor heater malfunction • A/F sensor malfunction ― A/F sensor connector or terminals malfunction ― A/F sensor deterioration ― A/F sensor loose ― Exhaust system leakage • PCM malfunction
SYSTEM WIRING DIAGRAM	Not applicable

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	RECORD FREEZE FRAME DATA/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the FREEZE FRAME DATA/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (A/F sensor related) on the repair order.	—	Go to the next step.
2	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.
2		No	Go to the next step.
3	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 1.5].) • Are any other PENDING CODEs and/or DTCs present?	Yes	Go to the applicable PENDING CODE or DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
3		No	Go to the next step.
4	INSPECT A/F SENSOR HEATER • Inspect the A/F sensor heater. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-D 1.5].) • Is there any malfunction?	Yes	Replace the A/F sensor, then go to Step 9. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
4		No	Go to the next step.
5	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 9.
5		No	Go to the next step.
6	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.
6		No	Retighten the A/F sensor, then go to Step 9. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
7	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 Step 9.
7		No	Go to the next step.
8	INSPECT A/F SENSOR • Reconnect all disconnected connectors. • Inspect the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-D 1.5].) • Is there any malfunction?	Yes	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 1.5].)
8		No	Go to the next step.
9	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-D 1.5].) • Drive the vehicle on a flat road surface 5 times under the following conditions. 1. Idle the engine for 20 s. 2. Shift to 2nd gear and rapidly accelerate the vehicle to 35 km/h {22 mph}and drive the vehicle at a constant speed for 25 s. 3. Stop the vehicle. 4. Switch the ignition to off and wait for 20 s or more. 5. Shift to 3rd gear and rapidly accelerate the vehicle to 50 km/h {32 mph}and drive the vehicle at a constant speed for 50 s. 6. Idle the engine for 20 s. • Perform the DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) • 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 1.5].) Go to the next step.
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
10		No	DTC troubleshooting completed.