Isuzu 4HK1 (Tier 3) Fault Code P0113

Fault Code P0113 PID 22 Intake air temperature sensor fault (high voltage fault)

Item To Be Detected:
Open/short circuit/ deterioration of sensor or harness

Preconditons When DTC is Set:
1) Key switch input voltage is 18V or more.
2) DTC P1630 or P1632 is not detected.
3) 3 minutes or more has elapsed after starting engine.

DTC Set Condition:
Intake air temperature sensor voltage is more than 4.95 V when 3 minutes or more has elapsed after starting engine.

Fault Judgement Period:
Approx. 4 sec.

Behavior When Trouble Occurs:
Not in particular Back-up: Intake air temperature default setting (at starting: −10°C {14°F}, at running: 25°C {77°F}) EGR stopped

Diagnosis Lamp: ON

Recovery From Failure: *2

Possible Causes:
1) Intake air temperature sensor more or less than specified value.
2) Looseness or play in ECM and coupling connector.
3) IAT Sensor circuit is shorted to power supply circuit.
4) Broken IAT sensor.
5) Open circuit or high resistance between ECM an IAT sensor.
6) Bad ECM.
7) Intake air temperature shows error value.

Isuzu 4HK1 (Tier 3) Fault Code P0112

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