P1EF8
Battery Charger Control Module High-Voltage Energy Communication Bus Enable Circuit Low Voltage
P1EF8 is an OBD-II diagnostic trouble code meaning: Battery Charger Control Module High-Voltage Energy Communication Bus Enable Circuit Low Voltage. Common causes: malfunction of the high-voltage battery charging module, damage to the control circuit wiring harness. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Problems with charging a high-voltage battery
- Reduced performance of the hybrid system
- Errors in the charging system
- The car may go into emergency mode
Causes
- Malfunction of the high-voltage battery charging module
- Damage to the control circuit wiring harness
- Fuse or relay problems
- Low voltage in the on-board network
- Control module software error
How to Fix
- Check control circuit voltage
- Inspect the wiring harness for damage
- Check fuses and relays
- Test the charging module
- Update control module software
Related codes
FAQ
What does the P1EF8 code mean?
P1EF8 is an OBD-II diagnostic trouble code that indicates: Battery Charger Control Module High-Voltage Energy Communication Bus Enable Circuit Low Voltage
What causes a P1EF8 error code?
The most common causes of P1EF8 include: Malfunction of the high-voltage battery charging module; Damage to the control circuit wiring harness; Fuse or relay problems; Low voltage in the on-board network.
How do I fix a P1EF8 diagnostic trouble code?
To fix P1EF8: Check control circuit voltage. Inspect the wiring harness for damage. Check fuses and relays. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1EF8?
Limited driving only, diagnose soon
How much does it cost to fix P1EF8?
The estimated repair cost for P1EF8 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat