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DTC P0134:00 [PCM (SKYACTIV-D)]

id0102t5702500

Outline

System malfunction location

A/F sensor circuit no activity detected

Detection condition

•  With the following conditions met, the A/F sensor element impedance is 75 ohms or more for a continuous 5 s.

―  Battery positive voltage: 11—16 V

―  Ignition is switched ON (engine on)

―  A/F sensor feedback correction is actuated

Fail-safe

•  PCM restricts engine torque./Limits the maximum engine speed.

•  Inhibits the DENOx/DESOx control.

•  Inhibits the diesel particulate filter regeneration control.

•  Inhibits the EGR control.

Possible cause

•  A/F sensor heater malfunction

•  A/F sensor malfunction

―  A/F sensor connector or terminal malfunction

―  A/F sensor deterioration

―  Poor installation of A/F sensor

•  PCM input signal error

―  A/F sensor signal

•  Open circuit in any of the following A/F sensor circuits.

―  signal (+) circuit

―  signal (-) circuit

•  PCM malfunction

System malfunction location	A/F sensor circuit no activity detected
Detection condition	• With the following conditions met, the A/F sensor element impedance is 75 ohms or more for a continuous 5 s. ― Battery positive voltage: 11—16 V ― Ignition is switched ON (engine on) ― A/F sensor feedback correction is actuated
Fail-safe	• PCM restricts engine torque./Limits the maximum engine speed. • Inhibits the DENOx/DESOx control. • Inhibits the diesel particulate filter regeneration control. • Inhibits the EGR control.
Possible cause	• A/F sensor heater malfunction • A/F sensor malfunction ― A/F sensor connector or terminal malfunction ― A/F sensor deterioration ― Poor installation of A/F sensor • PCM input signal error ― A/F sensor signal • Open circuit in any of the following A/F sensor circuits. ― signal (+) circuit ― signal (-) circuit • PCM malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION

•  Record the freeze frame data/snapshot data.

Note

•  Recording can be facilitated using the screen capture function of the PC.

—

Go to the next step.

2

VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY

•  Verify related Service Bulletins, on-line repair information, or Service Information availability.

•  Is any related Information available?

Yes

Perform repair or diagnosis according to the available information.

•  If the vehicle is not repaired, go to the next step.

No

Go to the next step.

3

INSPECT FOR OTHER RELATED DTCs

•  Perform the DTC inspection for the PCM.
(See DTC INSPECTION.)

•  Are any other DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

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

4

INSPECT A/F SENSOR HEATER FOR MALFUNCTION

•  Inspect the applicable part.
(See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-D 1.8].)

•  Is the part normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

5

INSPECT A/F SENSOR CONNECTOR CONNECTION

•  Switch the ignition OFF.

•  Disconnect the A/F sensor connector.

•  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection.

•  Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

6

VERIFY A/F SENSOR INSTALLATION CONDITION

•  Verify that there is no looseness in the A/F sensor installation.

•  Is the A/F sensor installation normal.

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

7

INSPECT A/F SENSOR FOR MALFUNCTION

•  Inspect the applicable part.
(See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-D 1.8].)

•  Is the part normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

8

INSPECT A/F SENSOR SIGNAL (+) CIRCUIT AND SIGNAL (-) CIRCUIT FOR OPEN CIRCUIT

•  Inspect the applicable circuit for open circuit.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

Repair completion verification 1

VERIFY THAT VEHICLE IS REPAIRED

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Clear the DTC recorded in the memory.
(See CLEARING DTC.)

•  Replicate the vehicle conditions at the time the DTC was detected using the following procedure.

―  Start the engine and warm it up.

―  Stop all electrical loads. (Such as A/C, headlights, blower fan, rear window defroster)

―  Idle the engine for 15 min.

―  Stop the engine.

•  Perform the DTC inspection for the PCM.
(See DTC INSPECTION.)

•  Is the same Pending DTC present?

Yes

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

If the CAN communication is normal, perform the diagnosis from Step 1.

•  If the malfunction recurs, replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

No

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTCs DISPLAYED

•  Perform the DTC inspection.
(See DTC INSPECTION.)

•  Are any other DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION • Record the freeze frame data/snapshot data. Note • Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
2	VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY • Verify related Service Bulletins, on-line repair information, or Service Information availability. • Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT FOR OTHER RELATED DTCs • Perform the DTC inspection for the PCM. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D)].)
4	INSPECT A/F SENSOR HEATER FOR MALFUNCTION • Inspect the applicable part. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-D 1.8].) • Is the part normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
5	INSPECT A/F SENSOR CONNECTOR CONNECTION • Switch the ignition OFF. • Disconnect the A/F sensor connector. • Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	VERIFY A/F SENSOR INSTALLATION CONDITION • Verify that there is no looseness in the A/F sensor installation. • Is the A/F sensor installation normal.	Yes	Go to the next step.
6		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
7	INSPECT A/F SENSOR FOR MALFUNCTION • Inspect the applicable part. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-D 1.8].) • Is the part normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
8	INSPECT A/F SENSOR SIGNAL (+) CIRCUIT AND SIGNAL (-) CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ― Start the engine and warm it up. ― Stop all electrical loads. (Such as A/C, headlights, blower fan, rear window defroster) ― Idle the engine for 15 min. ― Stop the engine. • Perform the DTC inspection for the PCM. (See DTC INSPECTION.) • Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification 2		No	DTC troubleshooting completed.