Inlet Air Temperature Sensor Circuit High Condition
Table of contents
P1193 RAM Possible Causes
- Faulty Inlet Air Temperature (IAT) Sensor
- Inlet Air Temperature Sensor harness is open or shorted
- Inlet Air Temperature Sensor circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How do I fix code P1193 RAM?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P1193 RAM code
The cost of diagnosing the P1193 RAM code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1193 RAM Description
The Inlet Air Temperature (IAT) Sensor is a 2-wire thermistor, as intake air temperature increases, thermistor resistance, and signal voltage decrease. Cold Engine, voltage is sent through a high resistance circuit in Powertrain Control Module (PCM). Warm Engine, voltage is sent through a low resistance circuit in PCM. PCM dual circuit improves IAT accuracy overall temp ranges. PCM monitors IAT voltage to help determine air density, due to temperature, for fuel calculations. The circuit is monitored when the engine is running. Diagnostic Trouble Code (DTC) will set when Inlet Air Temperature (IAT) sensor voltage is more than 4.9 volts.