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 DTC P0134 [L3 Turbo]

DTC P0134 [L3 Turbo]

id0102b7804900

DTC P0134

A/F sensor no activity detected

DETECTION CONDITION

• The PCM monitors the input voltage from the A/F sensor when the following conditions are met. If 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 heater, HO2S heater, A/F sensor, HO2S and TWC Repair Verification Drive Mode
- The following conditions are met.
• A/F sensor heater is tuned on for above 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.
• DTCs are stored in the PCM memory.

POSSIBLE CAUSE

• A/F sensor deterioration
• A/F sensor heater malfunction
• Leakage exhaust system
• Open or short circuit in the wiring harness between A/F sensor terminal 2D and PCM terminal 4AD
• Open or short circuit in the wiring harness between A/F sensor terminal 1C and PCM terminal 2J
• Open or short circuit in the wiring harness between A/F sensor terminal 1B and PCM terminal 2G
• Open or short circuit in the wiring harness between A/F sensor terminal 1A and PCM terminal 2D
• 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 DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR 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 P0132 is retrieved, ignore it until P0134 is fixed.
• Turn the ignition switch off, then to the ON position. (Engine off)
• Verify pending and stored DTCs using the WDS or equivalent.
• Is the DTC P2237 or P2251 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 on the FREEZE FRAME DATA?
Yes
Go to the next step.
No
Go to troubleshooting procedures for the DTC on the FREEZE FRAME DATA.
5
VERIFY CURRENT INPUT SIGNAL STATUS
• Warm up the engine.
• Access O2S11 PID using the WDS or equivalent.
• Verify the PID while racing engine in NEUTRAL.
• Is the PID normal?

- -1.0-1.0 A when idle

- More than 0.25 mA just after releasing the of accelerator pedal is released (lean condition)

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 sensor installed securely?
Yes
Go to the next step.
No
Install the sensor securely, then go to Step 10.
7
INSPECT EXHAUST SYSTEM FOR GAS LEAKAGE
• 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 wiring harnesses at the wiring harness-side connector terminals for an open circuit, repair or the replace wiring harness if necessary.
- A/F sensor terminal 1A and PCM terminal 2D
- A/F sensor terminal 1B and PCM terminal 2G
- A/F sensor terminal 1C and PCM terminal 2J
- A/F sensor terminal 2D and PCM terminal 4AD
• If all the items above are normal, replace the malfunctioning 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, L3, L3 Turbo].)
• Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.
No
Go to the next step.
9
INSPECT ENGINE COMPRESSION
• Inspect the engine compression.
• Is it normal?
Yes
Go to the next step.
No
Perform the engine overhaul for repairs, then go to the next step.
10
VERIFY TROUBLESHOOTING OF DTC P0134 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Turn the ignition switch to the ON position. (Engine off)
• Clear the DTC from the memory using the WDS or equivalent.
• Perform the PCM Adaptive Memory Produce Drive Mode and the A/F sensor heater, HO2S heater, A/F sensor, HO2S, and TWC Repair Verification Drive Mode.
• Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
• Are any DTCs present?
Yes
Go to the applicable DTC troubleshooting.
No
Troubleshooting completed.