P112F CADILLAC Possible Causes
- Faulty radiator coolant temperature sensor
- Radiator coolant temperature sensor harness is open or shorted
- Poor electrical connection in the radiator coolant temperature sensor circuit
How to Fix P112F CADILLAC Code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Check Engine Light on (or service engine soon warning light)
P112F CADILLAC Meaning
The Engine Radiator Coolant Temperature (RCT) sensor is a variable resistor that measures the engine coolant temperature in the radiator. The Engine Control Module (ECM) provides 5 volts to the engine radiator coolant temperature signal circuit and provides ground to the low reference circuit. The purpose of this diagnostic is to determine if the RCT sensor input is hotter than normal. The internal clock of the ECM will record how long the engine is off. If the required engine off time is met at startup, the ECM will compare the temperature difference between the actually measured RCT and ECT sensors.