DTC P0169 Cadillac
Fuel Composition Sensor Circuit Malfunction
Fuel Composition Sensor Circuit Malfunction
Description
Engine started ECT and IAT sensors within less than 8ºF at startup, and the PCM detected the Fuel Composition Sensor (FCS) signal was above the given threshold for the ambient temperature for 25 seconds out of a 30 second interval. Fuel Composition Senso
Cause and Solution
FCS is contaminated, damaged or skewed
Fuel is contaminated due to a higher than normal alcohol level
Ethanol concentration is higher than 85% (E85)
Video Guide
Diagnostic Info
- DTC Code: P0169
- Brand: Cadillac