DTC P0137: Inspection
Secondary HO2S (Sensor 2) Inspection
Since there is no direct method to test the component itself, troubleshooting is performed on the related components.
Test Procedure
Unit output voltage inspection
- Preparation
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Secondary HO2S (Sensor 2) connector (4P): disconnected
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- Procedure
- Turn the vehicle to the ON mode.
- Confirm the HDS [HO2S S2].
- Normal Conditions
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HDS [HO2S S2] value is more than 0.17 V .
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Results
- If it is normal, there is a problem with secondary HO2S (Sensor 2).
- If it is abnormal, there is a problem with other related components.
SO2, SO2_SG [SO2SG] Shorted Wire Inspection
Before disconnecting the PCM connector, jump the SCS line with the HDS, and wait more than 1 minute.
Test Procedure
- Preparation
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Secondary HO2S (Sensor 2) connector (4P): disconnected
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PCM connector A (50P): disconnected
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- Procedure
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Perform the inspection according to the following chart.
Refer to the Open/Shorted Wire Inspection Description for the method to inspect the shorted circuit below, then start to inspect according to circumstances.
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| (Disconnected) Secondary HO2S (Sensor 2) connector (4P) female terminals | ||||
| IG Mode |
|
Normal Conditions | ||
| SO2 shorted to ground inspection | OFF | There is more than 1 MOhm | ||
| SO2_SG [SO2SG] shorted to ground inspection | OFF | There is more than 1 MOhm |
Results
- If abnormal, there is a problem in the circuit.
PCM Inspection
Test Procedure
- If the other inspection item(s) indicated a normal condition, then it is determined that the remaining PCM is the cause.
Results
- There is a problem with the PCM.