Diagnostic Procedure

DTC P0134 DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED Have FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (HO2S related) been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and/or on-line 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.
2		No	Go to the next step.
3	VERIFY RELATED PENDING AND STORED DTC NOTE: If 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 other DTC present?	Yes	Go to the appropriate DTC troubleshooting procedures.
3		No	Go to the next step.
4	IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA Is DTC P0134 on FREEZE FRAME DATA?	Yes	Go to the next step.
4		No	Go to troubleshooting procedures for DTC on FREEZE FRAME DATA. (See DTC TABLE ).
5	INSPECT INSTALLATION OF FRONT HO2S Inspect if the front HO2S is loosely installed. Is the sensor installed securely?	Yes	Go to the next step.
5		No	Install sensor securely, then go to Step 10.
6	INSPECT FRONT HO2S HEATER Inspect the front HO2S heater. (See HEATED OXYGEN SENSOR (HO2S) INSPECTION ). Is the front HO2S heater normal?	Yes	Go to the next step.
6		No	Replace the front HO2S, then go to Step 10. (See HO2S REMOVAL NOTE ).
7	INSPECT FRONT HO2S Inspect the front HO2S. (See HEATED OXYGEN SENSOR (HO2S) INSPECTION ). Is there any malfunction?	Yes	Go to the next step.
7		No	Replace the front HO2S, then go to Step 10. (See HO2S REMOVAL NOTE ).
8	INSPECT FRONT HO2S SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY CIRCUIT Turn the ignition switch to OFF. Disconnect the front HO2S connector. Measure the voltage between front HO2S terminal A (wiring harness-side) and GND. Is the voltage above 3.22 V ?	Yes	Repair or replace for short to power supply circuit, then go to Step 10.
8		No	Go to the next step.
9	INSPECT FRONT HO2S SIGNAL CIRCUIT FOR OPEN Disconnect the PCM connector. Inspect for continuity between PCM terminal 2AD (wiring harness-side) and front HO2S terminal A (wiring harness-side). Is there continuity?	Yes	Go to the next step.
9		No	Repair or replace for open circuit, 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 memory using the WDS or equivalent. Perform the KOER self-test (using WDS or equivalent) or the HO2S heater, HO2S, and TWC Repair Verification Drive Mode (not using WDS or equivalent). (See KOEO/KOER SELF TEST ). (See OBD-II DRIVE MODE ). Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION ).
10		No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE ). Are any DTC present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE ).
11		No	Troubleshooting completed.

DTC P0134 DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED Have FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (HO2S related) been recorded?	Yes	Go to the next step;
1		No	Record the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS 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.
2		No	Go to the next step.
3	VERIFY RELATED PENDING AND STORED DTC NOTE: If 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 the DTC P2237 or P2251 also present?	Yes	Go to the appropriate DTC troubleshooting procedures.
3		No	Go to the next step.
4	IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA Is DTC P0134 on FREEZE FRAME DATA?	Yes	Go to the next step.
4		No	Go to troubleshooting procedures for DTC on FREEZE FRAME DATA. (See DTC TABLE ).
5	VERIFY CURRENT INPUT SIGNAL STATUS Warm up engine. Access O2S11 PID using the WDS or equivalent. Verify PID while racing engine in PARK (ATX) or NEUTRAL (MTX). Is PID normal? -1.0-1.0 A when idle More than 0.25 mA just after releasing the of accelerator pedal (lean condition)	Yes	Go to Step 8.
5		No	Go to the next step.
6	INSPECT INSTALLATION OF FRONT HO2S Inspect if the front HO2S is loosely installed. Is the sensor installed securely?	Yes	Go to the next step.
6		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 front HO2S. Is there gas leakage?	Yes	Repair or replace any malfunctioning exhaust part, then go to Step 10.
7		No	Inspect the following harnesses at wiring harness-side connector terminals for open or short circuit, repair or replace wiring harness if necessary. Front HO2S terminal 1A and PCM terminal 2AD Front HO2S terminal 1B and PCM terminal 2AC Front HO2S terminal 1C and PCM terminal 2Z Front HO2S terminal 2D and PCM terminal 2BG If all items above are normal, replace 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 [L3, AJ] ). Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to inspection results, then go to Step 10.
8		No	Go to the next step.
9	INSPECT ENGINE COMPRESSION Inspect engine compression. (See COMPRESSION INSPECTION ). Is it normal?	Yes	Go to the next step.
9		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. Turn the ignition switch to the ON position. (Engine off) Clear the DTC from memory using the WDS or equivalent. Perform the KOER self-test. (See KOEO/KOER SELF TEST ). Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION ).
10		No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE ). Are any DTC present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE ).
11		No	Troubleshooting completed.