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*:Preparation to carry out troubleshooting
Store the freeze frame data of the diagnosis code P0172.
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Q.
Is any other diagnosis code than P0172 set?
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Inspection chart for diagnosis code (Refer to ).
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- Data list reference table (Refer to
).
- Item 5: Intake air temperature sensor
- Item 6: Engine coolant temperature sensor
- Item 8: Manifold absolute pressure sensor
- Item 10: Air flow sensor
- Item BB: Barometric pressure sensor
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Q.
Are the check results normal?
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Perform the diagnosis code classified check procedure for the sensor that has
shown an abnormal data value. Inspection chart for diagnosis code (Refer to ).
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Q.
Is the check result normal?
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Q.
Is the check result normal?
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Repair the connector(s) or wiring harness.
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- Measure fuel pressure (Refer to Fuel Pressure Test
).
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Q.
Is the check result normal?
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Repair the fuel pressure.
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- Check injector itself (Refer to
).
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Q.
Is the check result normal?
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- Check whether foreign materials enter into fuel such
as water, diesel fuel, water removers and additives.
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Q.
Is the check result normal?
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- Refer to Data List Reference Table
.
- Item No. AC: Oxygen sensor
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Q.
Is the check result normal?
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Replace the front oxygen sensor.
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- If diagnosis code P0172 is set while the vehicle is idling, let the vehicle
idle for more than 20 minutes.
- If diagnosis code P0172 is set while the vehicle is running, let the vehicle run
with the same conditions of the freeze frame data, such as the vehicle speed, the crank angle sensor
and the coolant temperature sensor, for more than 10 minutes.
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Q.
Is the diagnosis code P0172 set?
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After replacing the oxygen sensor (front), go to Step 10.
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction ).
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- If diagnosis code P0172 is set while the vehicle is idling, let the vehicle
idle for more than 20 minutes.
- If diagnosis code P0172 is set while the vehicle is running, let the vehicle run
with the same conditions of the freeze frame data, such as the vehicle speed, the crank angle sensor
and the coolant temperature sensor, for more than 10 minutes.
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Q.
Is the diagnosis code P0172 set?
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