DTC P0134:00 [L8, LF, L5]

id010242702500

DTC P0134:00

A/F sensor circuit no activity detected
DETECTION CONDITION
•  The PCM monitors the input voltage from A/F sensor when the following conditions are met. Under the following monitoring conditions, the input voltage more than 3.22 V, the PCM determines that the A/F sensor is not activated.
MONITORING CONDITIONS
―  A/F sensor, HO2S, A/F sensor heater, HO2S heater and TWC Repair Verification Drive Mode
―  Following conditions are met
•  A/F sensor heater is turned on for more than 30 s.
•  Battery voltage: 10 —18 V
Diagnostic support note
•  This is an intermittent monitor (A/F sensor, HO2S).
•  The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
•  PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
•  FREEZE FRAME DATA is available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  A/F sensor deterioration
•  A/F sensor heater malfunction
•  Leakage exhaust system
•  Open or short circuit in wiring harness between A/F sensor terminal D and PCM terminal 2AC
•  Open or short circuit in wiring harness between A/F sensor terminal B and PCM terminal 2AD
•  Insufficient compression
•  Engine malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED
•  Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME on the repair order, then 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.
No
Go to the next step.
3
VERIFY RELATED PENDING AND STORED DTC
Note
•  If fuel monitor DTC, DTC P0132:00 is retrieved, ignore it until P0134:00 is fixed.
•  Switch the ignition to off, then to the ON. (Engine off)
•  Verify pending and stored DTCs using the M-MDS.
•  Is the DTC P2237:00 or P2251:00 also present?
Yes
Go to the appropriate DTC troubleshooting procedures.
No
Go to the next step.
4
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
•  Is DTC P0134:00 on FREEZE FRAME DATA?
Yes
Go to the next step.
No
Go to troubleshooting procedures for DTC on FREEZE FRAME DATA.
(See DTC TABLE [L8, LF, L5].)
5
INSPECT A/F SENSOR
•  Inspect the A/F sensor.
•  Is A/F sensor normal?
Yes
Go to Step 8.
No
Go to the next step.
6
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.
No
Install A/F sensor securely, then go to Step 10.
7
INSPECT GAS LEAKAGE FROM EXHAUST SYSTEM
•  Visually inspect if there is any gas leakage between the exhaust manifold and A/F sensor.
•  Is there gas leakage?
Yes
Repair or replace any malfunctioning exhaust part, then go to Step 10.
No
•  Inspect the following harnesses at wiring harness-side connector terminals for open or short circuit, repair or replace wiring harness if necessary.
―  A/F sensor terminal B and PCM terminal 2AD
―  A/F sensor terminal D and PCM terminal 2AC
―  A/F sensor terminal F and PCM terminal 2Z
―  A/F sensor terminal E and PCM terminal 2A
•  If all items above are normal, replace malfunctioning A/F sensor.
Then go to Step 10.
8
INSPECT SEALING OF ENGINE COOLANT PASSAGE
•  Perform the ENGINE COOLANT LEAKAGE INSPECTION. (See ENGINE COOLANT LEAKAGE INSPECTION [L8, LF, L5].)
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to inspection results, then go to Step 10.
No
Go to the next step.
9
INSPECT ENGINE COMPRESSION
•  Inspect engine compression.
•  Is it normal?
Yes
Go to the next step.
No
Perform engine overhaul for repairs, then go to the next step.
10
VERIFY TROUBLESHOOTING OF DTC P0134:00 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Switch the ignition to ON. (Engine off)
•  Clear the DTC from memory using the M-MDS.
•  Perform the KOER self-test.
•  Is the DTC P0134:00 present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [L8, LF, L5].)
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTC present?
Yes
Go to the applicable DTC troubleshooting.
(See DTC TABLE [L8, LF, L5].)
No
Troubleshooting completed.