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DTC P2173: Abnormal
Intake Air Amount
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FUNCTION
- Engine-A/T-ECU decides the allowable intake air amount
in accordance with the engine speed and the target opening angle of throttle valve.
- Engine-A/T-ECU checks whether the actual intake air amount is more than the allowable intake
air amount.
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TROUBLE JUDGMENT
Check Condition
Judgment Criterion
- The actual intake air amount is more than the allowable in take air amount for 1.5
seconds.
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TROUBLESHOOTING HINTS (The most likely causes for this code to be set are: )
- Throttle valve faulty operation.
- Failed throttle position sensor
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| STEP 1. MUT-II/III diagnosis code
Q: Diagnosis code set?
YES:
Inspection chart for diagnosis code (Refer to  ).
NO:
Go to Step 2  .
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| STEP 2. Replace the air flow sensor.
- After replacing the air flow sensor, re-check the trouble symptoms.
Q: Is the check result normal?
YES:
Go to Step 3  .
NO:
Check end.
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| STEP 3. Replace the throttle body assembly.
- After replacing the throttle body assembly, re-check the trouble symptoms.
Q: Is the check result normal?
YES:
Replacing engine-A/T-ECU.
NO:
Check end.
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