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Intake Manifold Air Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 153 PID: P105 SPN: 105 FMI: 3/3 LAMP: Amber SRT: |
Intake Manifold Air Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at intake manifold air temperature circuit. |
Possible white smoke. Fan will stay ON if controlled by the ECM. No engine protection for intake manifold air temperature. Marine: |
 Intake Manifold Air Pressure/Temperature Sensor Circuit
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Circuit Description
The intake manifold air temperature sensor monitors intake manifold air temperature and passes information to the electronic control module (ECM)
through the engine harness. If the intake manifold air temperature becomes too high, it will cause a derate condition.
Component Location
The intake manifold air temperature sensor is located in the air intake manifold. Refer to Procedure 100-002
for a detailed component location view.
Shop Talk
The intake manifold air temperature sensor shares return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to be active. Check active fault codes with multiple counts first.
Possible causes of this fault code include:
- Open return circuit in the harness, connectors, or sensor
- Open signal circuit or shorted to voltage source.
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Temperature (°F)
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Temperature (°C)
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Resistance (ohms)
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32
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0
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29k to 36k
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77
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25
|
9k to 11k
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104
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40
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4.9k to 5.8k
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212
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100
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600 to 700
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Refer to Troubleshooting Fault Code t05-153
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