Jaguar E-PACE P300e (2021–2024) BECM and HV Battery Contactor Fault
Hybrid/EV battery positive contactor circuit fault recorded
Contactors had logged a high number of activations
Contactor counter would not reset following a software update
Vehicle could still run and drive, but EV system operation required repair
The following fault code(s) may be present
P0AA0-66 - Hybrid/EV battery positive contactor circuit - signal has too many transitions/events
Do you have a Jaguar E-PACE P300e with a BECM or high-voltage battery contactor fault?
Don't ignore it. Book an initial inspection today and get expert help.
Parts Repaired/Replaced
- High-voltage battery contactors
- Contactor supply relay
- Battery Energy Control Module (BECM)
Affected Vehicles
Jaguar E-PACE P300e
- Jaguar E-PACE P300e 2021
- Jaguar E-PACE P300e 2022
- Jaguar E-PACE P300e 2023
- Jaguar E-PACE P300e 2024
Common Failure Symptoms
- P0AA0-66 stored in the BECM
- Excessive contactor activation count
- Contactor counter unable to reset
- Reduced or unavailable EV operation may occur
Jaguar E-PACE Diagnostic Report
Initially, diagnostics confirmed P0AA0-66 in the Battery Energy Control Module, indicating excessive switching events in the high-voltage battery positive contactor circuit. The contactors had exceeded 500,000 activations and would not reset after an earlier software update. A reset attempt was unsuccessful, so further investigation confirmed that internal high-voltage battery control components required replacement.
Jaguar E-PACE Repairs
The high-voltage battery was safely isolated and removed from the vehicle. After opening the pack, the technician accessed the control section and replaced the worn parts and BECM. The battery was then resealed, refitted and the vehicle reassembled. Fault-code memory was cleared before charging and road-testing the vehicle.
- Safely removed and opened the high-voltage battery
- Replaced the contactors, supply relay and BECM
- Cleared faults, charged the vehicle and completed drive-cycle testing
Resolution
Post-repair checks confirmed that the contactor count had returned to an acceptable level. The vehicle accepted a full charge, entered EV mode during the road test and switched correctly between electric and combustion operation.
Following the repair:
- High-voltage battery operation returned to specification
- EV mode operated correctly during drive-cycle testing
- The vehicle completed quality control and was released for collection
Need Help?
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Is the vehicle owned by you or your business?
Have you been advised the battery or component needs replacing on your vehicle?
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Do LKQ Electriq repairs have a warranty?
High Voltage System Repairs
Repairs involving high voltage systems typically include a 12-month, unlimited mileage warranty, offering you complete peace of mind.*
Lifetime Guarantee
All work carried out at LKQ Electriq is backed by our lifetime workmanship guarantee.
*Terms and conditions apply. Please consult a Service Advisor to confirm the specific warranty details for your vehicle prior to booking.
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