Dash Wizard
If the engine management light doesn’t come on when you switch the ignition on, the car fails its MOT — the tester has to see it light up and go out again. Dash Wizard repairs the cause inside the instrument cluster at your address: failed warning-lamp LEDs, cluster board faults and lamps that have been deliberately disabled.
The MOT inspection manual records it as ‘Engine MIL inoperative or indicating a malfunction’ — a Major defect under 8.2.1.2 (h) for petrol and hybrid cars first used from 1 July 2003, and 8.2.2.2 (g) for diesels first used from 1 July 2008. A lamp that never lights fails in exactly the same way as one that stays on.
Most garages can read fault codes but can’t repair the cluster itself. That is our side of the job: we find out why the lamp is dead, repair the cluster’s LED or circuit board, refit it and prove the bulb check — ignition on, lamp on; engine running, lamp off.
We restore warning lamps; we never disable them. If the light was switched off to hide a fault, that fault will show once the lamp works again — and we can diagnose it on the same visit with dealer-level equipment, so you know exactly what the car needs before the retest.
Dash Wizard
On most modern clusters the engine management light is a surface-mount LED soldered to the circuit board. When it fails, that one lamp goes dark and everything else keeps working. We replace the LED on your original cluster — no replacement unit, nothing to code.
Cracked solder joints, a damaged track or a failed driver stage will kill the lamp circuit. Water ingress and earlier repairs are the usual causes. We repair the board rather than swap the cluster.
LEDs get removed, masked or the track cut to hide a persistent fault before a sale. The MOT bulb check catches it every time. We reinstate the lamp, then read what it was hiding.
The tester switches the ignition on and checks that the engine malfunction indicator lamp (MIL) illuminates, then goes off — on some vehicles only once the engine is running. No lamp, or a lamp that stays on, is recorded as Engine MIL inoperative or indicating a malfunction: a Major defect and a fail.
The check applies to petrol, hybrid and gas cars first used on or after 1 July 2003 and to diesels first used on or after 1 July 2008. Kit cars, amateur-built vehicles and American pick-ups are exempt.
Get the repair done and the car back to the same test centre within 10 working days and it only needs a partial retest, not a full MOT.
Home, work or the garage that failed it — 7 days a week, 8am–8pm. The cluster is removed, repaired and refitted at your address, then we run the bulb sequence and a diagnostic scan before we leave. Outside the areas listed below? Ask — we can usually still help.
Cars and vans of all makes. Send your reg, make and model for a fixed quote before we book the visit.
Dash Wizard
Yes. The tester must see the lamp illuminate with the ignition on and go out afterwards. If it stays dark it is recorded as ‘Engine MIL inoperative or indicating a malfunction’ — a Major defect under 8.2.1.2 (h) for petrol or 8.2.2.2 (g) for diesel — and the vehicle fails.
MIL stands for malfunction indicator lamp — the engine management light. ‘Inoperative’ means it didn’t light up during the bulb check; ‘indicating a malfunction’ means it stayed on with the engine running. Both are the same defect and both fail the MOT.
Usually a failed LED or bulb in the instrument cluster, a fault on the cluster’s circuit board, or a lamp that has been deliberately disabled to hide an engine fault. Less often it is a wiring or ECU output fault, which our diagnostics will pinpoint.
No. We repair the lamp so it works permanently, as designed. If a fault is stored, the lamp will show it — we can diagnose and advise on that fault, but we never disable or mask warning lamps.
Rarely. Most dead engine management lights are a component-level repair on your original cluster, so there is nothing to code and the vehicle’s settings stay exactly as they were.
We’re a mobile service, 7 days a week, 8am–8pm — we come to you, and a little further out is rarely a problem, so just ask. Tell us your MOT retest date when you ask for a quote and we’ll work to it — back at the same test centre within 10 working days and it only needs a partial retest.
When a mobile service is not possible or simply not convenient, we have a postal service covering the whole of the UK. Once the speedo is received, we aim to have the correction carried out and the speedometer back in the post within 24 hours.
In-car TV activation, unlocking and reset for Audi, BMW, Range Rover, Rover 75, Mini and Mercedes — giving your passengers the ability to watch TV whilst on the move.
See our complete vehicle list. Dash Wizard is an established and reputable company committed to excellent customer service — Google us to view testimonials from our happy customers. All work is fully guaranteed.
Mileage Correction Company
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Dash Wizard
Dash Wizard mileage correction services. Call now for a quote:
Mon – Sunday: 8am – 8pm
info@dw-mileagecorrection.co.uk
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