Three technologies. One specialist.
EV, PHEV and MHEV are distinct architectures with different failure modes. We diagnose all three with the correct factory tools — not generic scanners with a firmware update.
Electric Vehicle
Pure electric drivetrain. High-voltage battery pack (400V–800V), motor controllers, on-board charger, and DC fast-charge systems. No combustion engine — every joule goes through the HV architecture.
- Battery state-of-health (SoH) diagnostics
- Cell balancing and thermal analysis
- Charging fault diagnosis (AC + DC)
- HV contactor and interlock testing
- Motor and inverter fault codes
Plug-In Hybrid
Two complete powertrains — combustion and electric — sharing the same drivetrain. More complex than either alone. The high-voltage battery charges from the mains and from regenerative braking.
- HV battery capacity and degradation
- On-board charger (OBC) faults
- EV mode not engaging / loss of range
- Hybrid powertrain management
- Regenerative braking system faults
Mild Hybrid
A 48V belt-integrated starter-generator (BISG) assists the combustion engine under load and recovers energy under braking. Cannot drive the vehicle alone — but faults still require specialist tools to diagnose.
- BISG starter-generator diagnostics
- 48V capacitor / lithium pack faults
- DC-DC converter (48V→12V) diagnosis
- Boost-start system faults
- Hybrid power management module
The marques we cover
Every vehicle listed here can be diagnosed with the correct factory tool — not an aftermarket clone with partial access.
Porsche
- Taycan800V EV · 2019–present
- Cayenne E-HybridPHEV · Gen 2 & Gen 3
- Panamera E-HybridPHEV · Gen 1 & Gen 2
- Macan Electric800V EV · 2024–present
- Macan S/GTS (MHEV)48V mild hybrid from 2022
JLR
- Jaguar I-PACE400V EV · 2018–present
- Defender 90/110 MHEV48V BISG · 2020–present
- Discovery 5 MHEV48V BISG · 2020–present
- Range Rover P400e PHEVPHEV · L405 & L460
- Range Rover Sport PHEVP400e · L494 & L461
Audi / VAG
- Audi e-tron GT800V EV · PPE platform (Taycan sibling)
- Audi Q8 e-tron400V EV · 2023–present
- Audi Q7/Q8 TFSI ePHEV · 14.1kWh battery
- Audi A6/A7 55 TFSI ePHEV · C8 platform
- Porsche-platform variantsAudi/Porsche shared PPE architecture
High-voltage diagnostics.
Done properly.
Most garages treat EV and hybrid faults the same way they treat a misfiring diesel — replace the obvious part and hope. We use the correct factory software to read every parameter before a single part is touched.
Secure Gateway — Porsche & JLR
Post-2021 Porsche Taycan, Macan Electric, Cayenne PHEV, and all new Defender and Discovery MHEV vehicles use a Secure Gateway that blocks all non-authenticated diagnostic access.
We hold live Porsche PPN and JLR Topix Cloud accounts with full Secure Gateway authentication. Most independent garages — and all generic OBD scanners — cannot get past this gateway.
Why come to an independent
for EV and hybrid work?
Dealer wait times are brutal
Prestige EV owners are competing with volume customers for main dealer service slots. Specialist independents with factory tools offer the same diagnostic capability — without the 4-week wait and the service advisors who don't understand the vehicle.
The parts cannon is expensive here
A PHEV on-board charger is £2,500–£4,000. A Taycan HV battery module is five figures. Replacing components without accurate data isn't just wasteful — it's financially catastrophic. Factory diagnostic data tells you exactly what's failed and why.
Not all independents have the tools
Any garage can buy a Launch X431 and claim EV capability. Reading generic fault codes on a Taycan tells you almost nothing — the same codes appear for a dozen different root causes. PIWIS III and Topix Cloud are the only tools with full bidirectional access.
Frequently asked
Can you service a Porsche Taycan the same as a dealer?
For diagnostics, coding, and most repair work — yes. We use PIWIS III with a live Porsche PPN account, which is the same tool and the same online connection the dealer uses. HV battery replacement and some online-only calibrations may still require a factory authorisation step, but the vast majority of Taycan fault diagnosis and repair is within our capability.
My Defender says 'Hybrid System Fault' — what does that mean?
On the new Defender MHEV, 'Hybrid System Fault' typically points to the 48V BISG (Belt-Integrated Starter-Generator), the 48V capacitor module, or the DC-DC converter that steps 48V down to 12V. The 12V battery is almost never the cause. Diagnosing this correctly requires JLR SDD with a live Topix Cloud session to read the 48V system live data — it's not visible on generic OBD scanners.
My I-PACE range has dropped — is the battery dying?
Usually not. Jaguar I-PACE range loss is far more commonly caused by battery conditioning issues, a software update that changed the SoH calculation, or thermal management behaviour — not actual cell failure. We read individual cell voltage data, pack internal resistance, and discharge history via SDD/Pathfinder. This produces a real SoH figure, not a range estimate, so you know exactly what you're dealing with.
Can you work on Audi PHEV vehicles?
Yes. Audi PHEV and EV models use the VAG Group diagnostic architecture (ODIS/VAS), and the e-tron GT shares its 800V PPE platform with the Porsche Taycan — so our Taycan capability directly covers e-tron GT diagnosis. For Q7/Q8 TFSI e and A6/A7 PHEV, we work with ODIS-level access.
Is it safe to work on an EV at an independent?
Safe isolation is a competence, not a brand. Our HV working procedures follow IMI EV Level 3 protocols — manual service disconnect, voltage verification at the HV junction box, and full PPE before any high-voltage component is touched. Dealer and independent HV safety standards are identical. The difference is the diagnostic tool, not the safety procedure.