Car Diagnostic Check

Has a warning light or car fault code appeared on your dashboard? This can be very worrying, especially if the engine light appears!

Today’s vehicles are far more advanced and have hundreds of sensors around the vehicle that report back to the Engine Control Unit or ECU. Some warning lights and error codes can be very difficult to diagnose, that’s why it’s important to get these checked by a professional.

At National, we can help diagnose fault codes, with our state-of-the-art Engine Diagnostic test equipment to help troubleshoot system warnings and check engine lights to identify issues early before a possible component failure occurs. Our technicians can then assist with advising you of any recommended repairs to fix the problem, reset the engine management or warning light and prevent further damage in the future.

All our branches have car diagnostic tools and our branch technicians will endeavour to identify faults and fix if possible, without the need to take your vehicle back to the motor dealer.

Please don’t ignore a warning light on your vehicle’s dashboard, it could become a bigger problem later. To find out what each dashboard warning light means, please click on the related article below.

Related: Car Dashboard Warning Lights

How does a Diagnostic Check work?

All modern cars contain on-board computers that monitor or control things like emissions levels, engine temperature and even windscreen wipers. When things go wrong, these computers produce error codes which can only be read with vehicle diagnostics equipment. You may see a warning light on your dashboard, but these only give a small part of the full picture.

Our car diagnostic check picks up these errors and identifies what they mean, so component failures can be prevented before they lead to further damage or expensive repairs!

Diagnostic Health Check

Not all vehicles display warning lights or fault codes when something goes wrong and an Engine Diagnostic Scan can give an early warning indicator of problems which may develop in the future.

At National, we offer a ‘Diagnostic Health Check’ for just £49.99, which scans all the modules on your vehicle and can highlight any car faults. The scan includes;

  • ECM (Engine Control Module)
  • TCM (Transmission Control Module)
  • ABS (Anti-Lock Braking System)
  • BCM (Body Control Module)
  • IMM (Immobiliser)
  • TPMS (Tyre Pressure Monitoring System)
  • SAS (Steering Angle System)
  • Lighting and Comfort Control System
  • Emissions Levels

What does a Diagnostic Check include?

The diagnostic check will include a full system health check. The tool will identify all modules connected to your vehicle’s Engine Control Unit (ECU) and individually check for any stored or current faults.

The tool will identify if the fault is ‘Current’ or ‘Stored/Historic’ – any stored or historic faults will be cleared from your vehicle’s ECU memory. Any current faults will indicate that something is not as it should be, and in most circumstances, we should be able to advise what work may be required.

The diagnostic check does NOT include the cost of repairs, replacement parts, recoding, etc. Where we are unable to offer a suitable repair (i.e. electrical system faults) we provide you with the fault codes that should enable you to obtain repair quotations from a specialist.

Engine management lights may not extinguish if a fault identified is not rectified.

How much are car diagnostic tests?

Our Diagnostic Health Check is just £49.99 and can be booked online today. Simply hit the green button at the top of the page to add to your basket.

Please note additional charges may apply in branch if extra parts or services are required to fix underlying problems and to clear fault codes and re-set service lights.

Other Frequently asked questions about car diagnostic tests

A car diagnostic check is performed to check for vehicle sensor faults. There are hundreds of different sensors on vehicles these days and it can be very difficult to find a fault that is displayed on your dashboard, so a car diagnostic check would need to be performed to identify the fault code.

All our branches have car diagnostic tools and our branch technicians will endeavour to identify faults and fix if possible, without the need to take your vehicle back to the motor dealer.

Please don’t ignore a warning light on your vehicle’s dashboard, it could become a bigger problem later.

Car diagnostic codes are faults picked up by your Engine Control Unit (ECU), these will need to be checked by a professional as soon as possible to prevent a bigger problem later.

Today’s vehicles are far more advanced and have hundreds of sensors around the vehicle, and they all have different car fault codes. Our state-of-the-art Engine Diagnostics tool can identify a fault and whether it is a current fault or historical.

A car diagnostic test can tell you if your vehicle has a fault and can read the error code. If a warning light appears on your dashboard, you would be best to get this checked by a professional who can perform a car diagnostic check. All our branches can perform diagnostic checks and read car fault codes.

All our branches have Engine Diagnostics equipment, which can identify hundreds of faults. We have over 239 branches throughout the UK, to locate your local National Tyres and Autocare branch please click here.

When a warning light flashes up on your dashboard, it can be very worrying and you would be best to book in for a car diagnostic test asap. Warning lights can be different colours and red usually means your vehicle needs to be checked immediately. An amber warning light will need attention as soon as possible to prevent it turning into a bigger problem later and green/blue warning lights are general messages, for instance, which lights are on, wipers on, handbrake on etc. However, you shouldn’t ignore these lights, as they can also indicate that you have a fault. To find out what the different dashboard warning lights mean please click here.

Don't ignore a warning light on your vehicle's dashboard
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