P1AE7
Battery Energy Control Module Hybrid Battery Voltage System Isolation Lost
P1AE7 is an OBD-II diagnostic trouble code meaning: Battery Energy Control Module Hybrid Battery Voltage System Isolation Lost. Common causes: damage to the insulation of high-voltage cables, insulation breakdown in high voltage system components. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Hybrid system power reduction
- High voltage system fault warning
- The car may go into emergency mode
- Increased fuel consumption
Causes
- Damage to the insulation of high-voltage cables
- Insulation breakdown in high voltage system components
- Moisture ingress into high voltage components
- Hybrid battery malfunction
- High Voltage System Grounding Problems
How to Fix
- Carry out diagnostics of the high-voltage system
- Check the insulation integrity of all high voltage components
- Use a megger to check insulation resistance
- Replace damaged high voltage components
- Check the tightness of the hybrid battery compartment
Related codes
FAQ
What does the P1AE7 code mean?
P1AE7 is an OBD-II diagnostic trouble code that indicates: Battery Energy Control Module Hybrid Battery Voltage System Isolation Lost
What causes a P1AE7 error code?
The most common causes of P1AE7 include: Damage to the insulation of high-voltage cables; Insulation breakdown in high voltage system components; Moisture ingress into high voltage components; Hybrid battery malfunction.
How do I fix a P1AE7 diagnostic trouble code?
To fix P1AE7: Carry out diagnostics of the high-voltage system. Check the insulation integrity of all high voltage components. Use a megger to check insulation resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1AE7?
Do not drive — repair immediately
How much does it cost to fix P1AE7?
The estimated repair cost for P1AE7 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat