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- Systems covered
- Petrol, diesel, hybrid & EV
- Equipment
- OBD-II scanning & live data
- Booking
- Pre-booking required
In plain English
Plugging into your car's computers to read what they have recorded, then testing the actual components, so the repair is based on evidence rather than guesswork.
Advanced diagnostic tools and techniques used to pinpoint faults accurately, so repairs are precise and small problems never get the chance to escalate. Covers engine, electrical, transmission, brake, suspension, HVAC, fuel, exhaust and hybrid or EV systems.
Booking
Pre-booking required. Electrical, transmission, exhaust and hybrid/EV diagnostics need advance booking so we can schedule the right equipment and technician.
Diagnostic scan tool connected to a car's OBD-II port showing live data
Prompt: Photorealistic shot of a handheld automotive diagnostic tablet displaying live sensor graphs, connected by cable to a car's OBD-II port under the dashboard. Dim cabin interior, screen glow as the main light source, technician's hand holding the device. Technical and precise, screen text illegible/abstract.
Do you need this?
Signs it's worth booking in
Tick anything that sounds like your car. There are no wrong answers, and nothing gets sent anywhere. It simply gives us somewhere sensible to start when you ring.
What's covered
Everything included
Check engine light diagnosis, engine performance analysis and cylinder compression testing, pinpointing misfires, rough idling and poor fuel economy.
Battery, alternator output and starter motor testing, plus wiring inspection and troubleshooting, to prevent electrical failures. Please pre-book.
OBD scanning retrieves the diagnostic trouble codes stored by your vehicle's computers, and we interpret the live data behind them. The codes are cleared once the repair is verified, never before.
Fluid analysis, solenoid testing and transmission control module diagnostics to identify slipping gears or fluid leaks. Please pre-book.
Pad and rotor wear inspection, ABS diagnostics, and caliper and hydraulic system testing to find uneven wear, fluid contamination or ABS faults.
Visual inspection for wear and damage, steering linkage and tie rod end checks, shock absorber testing and steering angle sensor faults.
Refrigerant pressure testing, HVAC control panel testing, blower motor and fan testing, and heater and evaporator core inspection.
Injectors, pumps and pressure regulators are tested, with throttle body inspection and cleaning, to find leaks, low pressure or delivery problems.
Inspection for leaks and damage plus testing of catalytic converters and oxygen sensors, confirming compliance with emissions regulations. Please pre-book.
Traction battery health and capacity testing, electric motor diagnostics, and inverter and converter testing. Please pre-book.
How we do it
What actually happens
No surprises and no jargon. If we find something else while the car is with us, you get a phone call and a price before a spanner goes near it.
Retrieving diagnostic trouble codes stored in the vehicle's computer to reveal system malfunctions and irregularities
Pinpointing faults affecting engine performance such as misfires, rough idling or poor fuel efficiency
Assessing electrical component health to prevent failures before they leave you stranded
Interpreting live data from the vehicle's computer systems, then clearing codes once the repair is verified
Making accurate repairs from accurate findings, which is what keeps a vehicle safe, responsive and reliable
Questions
Diagnostics, answered
No. A code tells you which circuit reported a problem, not which part failed. The same code can have several very different causes. We read the codes, then test the components and live data to confirm the real fault before recommending any repair.
Electrical, transmission, exhaust emissions and hybrid/EV work needs specific equipment and a technician with time set aside to test properly. Booking ahead means we can do the job right rather than squeezing it between other work.
Yes, including traction battery health and capacity testing, electric motor diagnostics, and inverter and converter testing. Please book these in advance.
We clear fault codes once the underlying repair is done and verified. Clearing a light without fixing the cause just hides the problem until it comes back.
Also worth a look
Related services
Book your diagnostics at Watford Road
Find us at Rear of 28-30 Watford Road, Sudbury, Wembley, HA0 3EP. We have looked after drivers across Sudbury Town and North Wembley and the surrounding area for more than 25 years.