Lewis Motor Services
Service · Diagnostics

Diagnostics & fault finding, on your driveway.

A warning light isn’t a job - until you know what’s actually triggering it. We bring the diagnostic kit to you and read the fault data the same way a workshop would.

Modern cars, vans and HGVs talk over OBD - we just need to listen. Our mobile diagnostic rigs cover engine management, ABS, airbag, transmission, body control and emissions modules across all major manufacturers.

On a typical call-out we plug in, pull the live and stored fault codes, and run a live-data trace to confirm what’s sensor and what’s actually broken. You get the readout, in plain English, and a quote before any spanner moves.

If it’s a sensor or a connector we can replace on-site, we’ll do it the same visit. If it’s a deeper internal fault that needs a workshop, we’ll tell you straight, no charge.

When to call

Tell-tale signs.

Anything from this list is worth a phone call. We’ll talk it through and only drive out if there’s a job to do.

01

Engine management light

Constant or intermittent EML. We pull the codes and explain whether it’s urgent, monitor-only, or due an MOT.

02

ABS / traction light

Wheel-speed sensor faults, broken reluctor rings, ABS pump issues. We diagnose before quoting parts.

03

Limp mode / power loss

Boost faults, EGR, DPF, fuel-system faults. Live-data reads pinpoint the cause.

04

Misfire or rough running

Cylinder cut-out tests, coil and injector live data, compression read across the rail.

05

Pre-MOT health check

Find the failures before the test station does. Save a re-test fee and a wasted morning.

06

Pre-purchase inspection

Scan the car before you buy. Hidden fault codes and reset history flag the cars to walk away from.

Coverage

Where we come to you.

Newport and the surrounding NP postcodes. Click through for the local detail.

FAQs

Diagnostics & fault finding FAQs.

Most plug-in scans take 30-45 minutes. Live-data traces and intermittent faults can take longer - we’ll tell you on the phone whether to expect an hour or a half-day.
Mon-Sat 08:00-18:00
Keeping you moving

Need it back on the road?

Mobile mechanic covering Newport and the surrounding areas. Call now and we’ll talk it through - no quote charges, no obligation.