System Isolation/Coolant Level Sensor Fault – Hybrid/EV Battery Charging System Disabled
Table of contents
P1FFF CADILLAC Possible Causes
- Faulty System Isolation/Coolant Level Sensor
- System Isolation/Coolant Level Sensor harness is open or shorted
- System Isolation/Coolant Level Sensor circuit poor electrical connection
How do I fix code P1FFF CADILLAC?
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 P1FFF CADILLAC code
The cost of diagnosing the P1FFF CADILLAC 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)
P1FFF CADILLAC Description
This diagnostic is an indicator that hybrid/EV battery pack charging is disabled because the hybrid/EV powertrain control module 2 detected one of the following conditions:
– A loss of isolation between the hybrid/EV battery pack high voltage circuits and vehicle chassis
– A low coolant condition of the hybrid/EV battery pack coolant system
– A fault in the hybrid/EV battery pack coolant level sensor/circuit