- Jun 6, 2013
- Reaction score
- Rochester, New York
- Ram Year
- 5.7 Hemi
"The third code is P0111 - 'Intake Air Temp Sensor 1 Circuit performance' I have replaced this IAT sensor and also run bench tests and the ohm readings etc are spot on. I read that this error can be caused by an out of range difference between it and the coolant Temp sensor. So I checked out the coolant sensor and it too checks out fine on a bench test. I can clear this code but it will come back within 30 miles or so."
Actually there are three set conditions:
The Powertrain Control Module (PCM) compares the Ambient Air Temperature (AAT), Engine Coolant Temperature (ECT), and Intake Air Temperature (IAT) Sensor values. If one sensor value is not within approximately 10°C (18°F) of the other temperature sensors for two consecutive trips, a DTC will set.
Possible causes are: IAT signal circuit high resistance, a sensor ground circuit high resistance, faulty IAT sensor, or PCM.
If you have access to a wiring diagram, check to see if all of the circuits dealing with B16DD, B21DD, and P0111 somewhere go through the same connector or utilize a common ground.
2019 Ram 1500 Billet Silver Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33-gallon fuel tank, factory dual exhaust, 18” wheels. Build date: 3 June 2018. Now at 68277 miles