An electronic service tool indicates the following information for a diesel engine in a truck that has been parked inside the garage overnight:
Engine Coolant Temperature 23°C (73°F)Intake Manifold Air Temperature7°C (45°F)Inlet Air Temperature (air cleaner)24°C (75°F)DOC Inlet Temperature24°C (75°F)What do these readings indicate?
A. The intake manifold air temperature sensor should be replaced without any additional testing.
B. There is an in-range failure of the intake manifold air temperature measurement system.
C. The low intake manifold air temperature indicates the engine is running and the charge air cooler is working correctly.
D. The intake manifold air temperature circuit is likely shorted to ground.
Answer: B
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