P0AA6 Fault Code Fixed
“Unable to charge.”
That was the message Mr K’s Jaguar I-PACE displayed time after time, leaving him unable to drive or charge his vehicle.
After months of frustration and several unsuccessful repair attempts elsewhere, he turned to Smith’s of London, Croydon, for answers.
Before visiting us, the main dealer had diagnosed a failed rear drive motor and quoted a £13,000 repair. Wanting another opinion before approving such major work, he brought the car in for a detailed inspection.
At Smith’s of London, we rely on evidence, not guesswork. Our expert technicians carried out structured testing, identified the true cause, and restored the Jaguar’s charging function completely.
Achieving that outcome required precision, patience, and a disciplined process. Here’s how we found the real cause of the P0AA6 fault.
The First Step in Diagnosing the Jaguar I-PACE System Fault
Accurate diagnosis begins with understanding, not assumptions.
That’s why when Mr K came to Smith’s of London, Croydon, our first task was to listen carefully.
He explained how his Jaguar I-PACE displayed an “Unable to charge” warning each time he tried to connect it, despite prior repairs attempted elsewhere.
That information was essential. It helped our EV experts focus the investigation and rule out unnecessary steps.
With that understanding, our technicians began the first diagnostic stage using a structured approach:
- Inspecting for visible faults, including damaged connectors or signs of corrosion.
- Running a diagnostic scan through Jaguar-approved diagnostic software to read live system data.
- A controlled road test was performed to observe how the system responded during normal operation.
The scan revealed the P0AA6 fault code, identifying a High-Voltage Isolation Fault within the EV system.
This indicates the high-voltage circuit has lost electrical isolation, so the vehicle disables charging and drive functions as a safety measure.
However, the fault code was just the beginning. The P0AA6 can arise from various causes, making systematic testing vital.
Handling high-voltage systems requires more than experience; it demands specialist training, strict safety control, and the right equipment. That’s why every EV repair at Smith’s of London is carried out only by our fully qualified, high-voltage technicians.
At this point, we knew what the car was reporting, but the next step was to find why the isolation fault existed.
Looking Deeper into the Jaguar I-PACE P0AA6 Isolation Fault
With the initial fault verified, our next aim was to pinpoint exactly where the high-voltage isolation issue was occurring.
Our EV experts at Smith’s of London, Croydon, implemented a structured isolation testing plan, methodically examining every high-voltage circuit section.
Using our dealer-level diagnostic equipment and strict safety procedures, the team disconnected each high-voltage component in sequence and monitored the system’s insulation readings after every stage.
The goal was to find the exact point where voltage was escaping to ground.
Throughout the investigation, our experts:
- Logged isolation readings at each test stage.
- Disconnected components individually to observe changes in system values.
- Compared all data with Jaguar’s technical specifications.
- Carefully reviewed the results to remove any incorrect readings.
When the rear electric motor was disconnected, signs of oil contamination were found, confirming what the dealership had noted earlier. However, isolation readings showed that the electrical fault was still active.
That discovery was key. It revealed that replacing the motor, as the dealer had recommended, would not have fixed the real issue, which would have been highly frustrating for Mr K.
After every external component had been tested and disconnected, the isolation fault continued, clearly indicating a problem inside the high-voltage battery itself.
By relying on evidence and a structured testing plan, our expert technicians were able to identify the true source of the issue and prepare for an internal battery inspection.
Locating the True Cause of the Jaguar I-PACE P0AA6 Fault Code
After testing all external systems, the remaining data confirmed the issue was located inside the high-voltage battery pack.
Our EV experts at Smith’s of London, Croydon, then carried out a controlled battery removal, following Jaguar’s official high-voltage safety protocols. Every step of this inspection was performed with care to ensure complete safety.
Inside the Battery Energy Control Module (BECM), the cause was revealed.
Several terminal points and mounting fixings were positioned near exposed cable sections, and over time, vibration had worn down the insulation.
The worn insulation allowed voltage to bridge to the base plate, intermittently shorting to ground.
That internal failure explained why the isolation readings never stabilised, even after every external system had been removed from the circuit. The problem existed within the core of the high-voltage battery.
Repairing the Jaguar I-PACE P0AA6 Fault Code
Before the repair began, our EV experts spoke with Mr K to review our findings and confirm the necessary steps to fix the issue.
At Smith’s of London, Croydon, we believe clarity is essential in every repair. You’ll always be kept in the know at every stage of the repair process. We only fix your vehicle once you fully understand and agree to the work.
Once we received the go-ahead from Mr K, our Jaguar experts fitted a replacement Jaguar BECM base plate to correct the internal isolation failure within the battery. We then adjusted internal wiring to restore proper electrical separation.
Since the rear electric motor had been found contaminated with oil, it was replaced at the same time as part of the complete repair process.
After fitting both components, our technicians performed recalibration and setup using Jaguar-approved diagnostic software to confirm the motor operated precisely to manufacturer standards.
With everything reassembled, the Jaguar was prepared for the final validation phase, where every repair step was tested and confirmed.
Confirming the Jaguar I-PACE P0AA6 Fault Was Resolved
Following completion of the repairs, our technicians conducted a comprehensive series of validation tests to ensure that the isolation fault was fully rectified.
After carefully reassembling the car, our team re-energised the high-voltage system and ran extensive resistance and isolation tests to confirm there was no voltage leakage to ground.
To verify every aspect of the work, our EV expert technicians:
- Checked isolation readings throughout the high-voltage circuit.
- Confirmed all components were communicating correctly within the system.
- Performed a controlled drive test to ensure smooth power output.
- Tested the charging system to confirm full functionality with no error warnings.
All tests confirmed the same outcome; the Jaguar P0AA6 fault code was cleared, and the vehicle operated perfectly.
Delivering Proven Results: Expert Jaguar I-PACE Repairs You Can Trust
When Mr K came to collect his Jaguar I-PACE, our Jaguar experts showed him the components that had caused the issue and the data confirming the successful repair.
That clarity makes all the difference. It helps turn a highly technical process into something customers can trust and understand.
At Smith’s of London, Croydon, accuracy defines our work. Every step of testing, diagnosis, and repair is guided by data. We identify the fault, validate the result, and ensure everything functions precisely as it should before returning the vehicle.
This Jaguar I-PACE repair is a perfect example of that process in action. By following structured testing and validation at every stage, our EV-qualified technicians resolved the P0AA6 isolation fault and restored the vehicle’s full charging and drive performance.
After weeks off the road, Mr K was delighted to have his Jaguar I-PACE back in perfect working order. It was charging normally, driving smoothly, and performing exactly as it should. He left confident in both the repair and the expertise that made it possible.
Jaguar I-PACE Fault? Get It Checked by Experts
If your Jaguar I-PACE displays charging faults or struggles to perform as normal, it’s best to get it checked immediately. If left unresolved, high-voltage system issues like the P0AA6 isolation fault can quickly prevent the car from charging altogether.
At Smith’s of London, Croydon, our EV-qualified technicians use a structured, evidence-based approach to diagnose the true source of complex electrical faults and complete the correct repair the first time.
We work with the same advanced diagnostic systems and technical data used by Jaguar main dealers, paired with the personal attention and honest value you’d expect from a trusted independent specialist.
That meant Mr K’s I-PACE received a repair carried out to manufacturer standards, restoring full charging function and delivering greater value than the alternative he’d been offered elsewhere.
You can expect the same accuracy, verified results, and confidence in your vehicle’s performance without the main dealer prices.
Why Drivers Choose Smith’s of London
Here’s why drivers across Croydon, Beckenham, Coulsdon and the surrounding areas choose us:
- 12-month parts and labour guarantee.
- Reliable, data-led repairs for lasting results.
- Experienced EV experts using Jaguar-level diagnostics.
- Transparent communication at every stage.
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If your Jaguar I-PACE shows a P0AA6 fault, call Smith’s of London, Croydon today on 020 8674 3377, your local EV experts ready to help.
