Car Diagnostics & Auto Electrical Repair in London & Hertfordshire

Car diagnostics and auto electrical repair in London and Hertfordshire

A warning light, a flat battery, a non-start or an intermittent gremlin – modern cars are packed with electronics, and getting the fault diagnosed correctly first time saves you both time and money. At Perfect Touch we carry out dealer-level car diagnostics and auto electrical repair on all makes, from everyday cars to prestige and performance models.

With years of experience and professional diagnostic equipment, we read every module, trace wiring and earth faults, and fix the root cause rather than guessing at parts. We explain what is wrong in plain English and give you a clear quote before any work begins.

What we diagnose and repair

Warning lights & fault codes

ECU & module faults

Battery & charging

Alternators & starter motors

Wiring & looms

Coil packs & ignition

Immobiliser & alarm faults

Electric windows & locking

Module coding & battery registration

Lighting & headlamps

Sensors & ABS faults

EV & hybrid HV diagnostics

Dealer-level diagnostics for every make

Electrical fault-finding takes the right equipment and the know-how to use it. Our diagnostic gear handles fault-code reading, live data, module coding and battery registration across all makes, so we can pinpoint problems main dealers often charge a premium for. Whether you drive a BMW, Audi, Mercedes-Benz or any other marque, we trace the fault to its source rather than replacing parts and hoping.

A warning light is often the first sign of trouble, and it could be something simple or something more serious, so it is always worth getting checked. Auto electrical diagnostics also pairs naturally with our car servicing, 4-wheel alignment and rolling road work.

Car diagnostics FAQs

It depends on the fault. We carry out an initial diagnostic, explain what we find in plain English, and give you a clear quote before any repair work begins, so there are no surprises.
We connect professional diagnostic equipment to read fault codes and live data, then trace the fault through the wiring, sensors and control modules to find the true cause, rather than simply replacing parts.
It depends on the warning. A red light usually means stop and call us straight away; an amber light generally means get it checked soon. We can read the code and advise quickly.
Yes. We work on all makes, from Ford and Volkswagen to BMW, Mercedes-Benz, Audi, Porsche and more, with the equipment to read and code their modules.
Yes. We provide HV-safe diagnostics for electric and hybrid models, including charging, battery-management and 12V system faults.
Our workshop is on Sewardstone Road, serving drivers across London, Hertfordshire and Essex. We also offer a free vehicle healthcheck and a courtesy car.

Book a car diagnostic or get in touch

Got a warning light or an electrical fault? Call us on 0208 191 7916 and we will be glad to help. Clear advice and a quote before any work.

Recent Testimonials