DTC P0134 [L3 R.H.D.]

id0102a2804900

DTC P0134

HO2S no activity detected

DETECTION CONDITION

• The PCM monitors the input voltage from the HO2S when the following conditions are met. If the input voltage from the sensor never exceeds 0.55 V for 83 s, the PCM determines that the sensor circuit is not activated.
MONITORING CONDITIONS
- The following conditions are met
• Engine speed is above 1,500 rpm.
• Engine coolant temperature is above 70 ×C {158 ×F}.
Diagnostic support note
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle if the DTC for the same malfunction has been stored in the PCM.
• The PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.

POSSIBLE CAUSE

• HO2S deterioration
• HO2S heater malfunction
• Leakage exhaust system
• Open circuit or short to ground in wiring harness between HO2S terminal A and PCM terminal 100
• Insufficient compression
• Engine malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA 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 repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair 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 the fuel monitor DTC, (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 any other DTC 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 in the FREEZE FRAME DATA?
Yes
Go to the next step.
No
Go to troubleshooting procedures for DTC on FREEZE FRAME DATA.
5
VERIFY CURRENT INPUT SIGNAL STATUS
• Warm up engine.
• Access the O2S11 PID using WDS or equivalent.
• Verify the PID while racing engine in PARK.
• Is the PID normal?
- More than 0.55 V when suddenly depressing accelerator pedal (rich condition)
- Less than 0.55 V just after releasing the of accelerator pedal (lean condition)
Yes
Go to step 8.
No
Go to the next step.
6
INSPECT INSTALLATION OF HO2S
• Inspect if the HO2S is loosely installed.
• Is the sensor installed securely?
Yes
Go to the next step.
No
Install 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 HO2S.
• Is there gas leakage?
Yes
Repair or replace any malfunctioning exhaust part, then go to Step 10.
No
• Inspect the following harnesses for open circuit or short to ground, repair or replace wiring harness if necessary.
- HO2S terminal A (wiring harness-side) to PCM terminal 100 (wiring harness-side)
• Repair or replace wiring harness if necessary.
• If all items above are normal, replace the malfunctioning sensor.
Go to Step 10.
8
INSPECT SEALING OF ENGINE COOLANT PASSAGE
• Perform the "ENGINE COOLANT LEAKAGE INSPECTION." (See ENGINE COOLANT LEAKAGE INSPECTION.)
• 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 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from memory using the WDS or equivalent.
• Perform KOER self test.
• 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.