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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 4290
Experience:  Owner at DJ Wilson
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2012 kenworth t660 turbo shuts down gets a code 2973

Customer Question

2012 kenworth t660 turbo shuts down gets a code 2973 irratick air flow changed sensor and still comes up.
Submitted: 4 months ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 4 months ago.

Hi my name is***** will be glad to help. what is the make and complete model of your engine?

Customer: replied 4 months ago.
Cummings ISX 15 485 hp
Expert:  Daniel Wilson replied 4 months ago.

Thanks for the update. This fault is goes active when the intake manifold pressure is too high or low for the current engine operating conditions. The ECM compares the intake manifold pressure reading to turbocharger speed to determine if the pressure reading is valid.
The intake manifold pressure/temperature sensor is located in the air intake horn

Possible causes of this fault are:

  • A malfunctioning intake manifold pressure sensor
  • A malfunctioning barometric pressure sensor.
  • Leaks in the air intake system between the turbocharger and intake manifold
  • Restriction in the charge-air cooler
  • A malfunctioning turbocharger speed sensor
  • Plugged or restricted exhaust system
  • A plugged intake manifold pressure sensor
  • Air filter restriction.


Fault Code: 2973
PID: P102
SPN: 102
FMI: 0/2
LAMP: Amber

Intake Manifold 1 Pressure - Data Erratic, Intermittent, or Incorrect. The ECM has detected an intake manifold pressure signal that is too high or low for present engine operating conditions.

Expert:  Daniel Wilson replied 4 months ago.

Hi Did you get this resolved?

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