P1FFF GMC Code - System Isolation/Coolant Level Sensor Fault - Hybrid/EV Battery Charging System Disabled
Quick Answer
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 Common causes include 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. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1FFF GMC indicates System Isolation/Coolant Level Sensor Fault - Hybrid/EV Battery Charging System Disabled.
- Common causes
- Common causes include 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.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1FFF GMC Description
- 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
What are the Possible Causes of the DTC P1FFF GMC?
- 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 to Fix the DTC P1FFF GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1FFF GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1FFF GMC Code
1. What are the common symptoms of OBDII code P1FFF in a GMC vehicle?
- Common symptoms include the hybrid/EV battery charging system being disabled, a warning light on the dashboard, and potential issues with the coolant level sensor.
2. What does the OBDII code P1FFF indicate in a GMC vehicle?
- The code indicates a System Isolation/Coolant Level Sensor Fault, which results in the hybrid/EV battery charging system being disabled.
3. What are possible causes of the OBDII code P1FFF in a GMC vehicle?
- Possible causes include a malfunctioning coolant level sensor, wiring issues, software glitches, or problems with the hybrid/EV battery charging system.
4. How can I diagnose the OBDII code P1FFF in my GMC vehicle?
- Diagnosis typically involves using an OBDII scanner to retrieve the code, checking the coolant level sensor and its connections, inspecting the wiring for any damage, and testing the hybrid/EV battery charging system components.
5. Can I still drive my GMC vehicle with the OBDII code P1FFF present?
- It is not recommended to drive the vehicle with the code present, as the hybrid/EV battery charging system is disabled, which can affect the vehicle's performance and safety.
6. How can I repair the System Isolation/Coolant Level Sensor Fault causing the OBDII code P1FFF in my GMC vehicle?
- Repairing the issue typically involves replacing the faulty coolant level sensor, repairing any damaged wiring, and resetting the code using an OBDII scanner.
7. Is it safe to attempt repairs for the OBDII code P1FFF in a GMC vehicle myself?
- If you have experience working on automotive electrical systems and are comfortable with diagnosing and repairing such issues, you may attempt the repairs yourself. Otherwise, it is best to seek professional help.
8. Will resetting the OBDII code P1FFF in my GMC vehicle solve the issue permanently?
- Simply resetting the code may temporarily clear the warning light, but if the underlying issue causing the fault is not addressed, the code is likely to reappear.
9. Can the OBDII code P1FFF in a GMC vehicle be related to other hybrid/EV system problems?
- Yes, the System Isolation/Coolant Level Sensor Fault indicated by the code may be related to or affect other components of the hybrid/EV system, so a thorough diagnosis is recommended.
10. How long does it typically take to repair the OBDII code P1FFF in a GMC vehicle?
- The repair time can vary depending on the exact cause of the fault and the availability of parts. It is advisable to consult a professional technician for an accurate estimate.
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