Car Diagnostics | Book a Car Diagnostic in Truro

£89.92

Average price for this repair in Truro in the last 30 days^

Trustpilot rating for all RAC Mobile Mechanics.

Why choose the RAC for a car diagnostic?

At the RAC, we've got over 125 years' experience helping UK drivers. We have the skills and knowledge to keep your vehicle running.

Plus, with RAC Mobile Mechanics, you can avoid the hassle of taking your vehicle to a garage when you need a repair. We’ll come to you, at your home or work.

Close up of an RAC Mobile Mechanic underneath a car

Our top pick in Truro

Our top pick

RAC Mobile Mechanic in Truro

At the RAC, we’ve got over 125 years’ experience in offering complete peace of mind to our members. We’re best known for our breakdown service. And now – our new RAC Mobile Mechanics are here to help make every day motoring easier. If you need a service or repair, they’ll come to you at your home or work.

Book a car diagnostic

Our mobile mechanics will spend up to 30 minutes checking your car for faults and talk you through any repairs you might need and give you a report for your records. There are various ways we can check for faults, which could include plugging in to check your car’s onboard engine management system.

OEM quality parts

We use original equipment manufacturer (OEM) standard parts, which means every new part will be the same standard and same quality as the original part it replaced.

Mechanics you can trust

Our mobile mechanics are friendly, honest, and backed by the RAC.

Close up of an RAC Mobile Mechanic running a vehicle diagnostic check

Book a repair

It’s easy to book a car repair online. We bring the garage to you with RAC Mobile Mechanics, or find a trusted local garage. Common repair jobs include:

Clutch Replacement

We diagnose and repair clutch issues – whether your clutch is heavy or slipping, or you’re having trouble changing gears.

Alternator repair

We check and correct alternator faults to keep your charging system running smoothly.

Oil change

Oil is vital to a healthy engine, so it’s important to change it regularly.

Brake pads & Discs

If your brakes are making noise or you’re noticing reduced stopping power, it’s likely time to replace your brake pads or discs.

And it’s not just car diagnostics that we do in Truro

Mobile mechanics bring the garage to you, saving you the hassle of getting your car to a garage. If you need a service or repair, they’ll come to you at your home or work.

Try one of our RAC Approved Garages

View all garages

P C Tonkin & Son Ltd

5.0/5

1912 As Cornwall’s longest establish car dealership, here at PC Tonkin & Son we are proud of our 110 year history which has spanned four generations of the Tonkin family. Let us tell you more….. Like any business, ours started from humble beginnings back in 1912. In the early years of the business, Preston Tonkin (26 in 1912) worked from his home at Wesley Terrace in Bugle. His business started repairing motor cycles and bicycles. At the same time, he also worked within the local clay industry. As his reputation grew, Preston moved to work from premises at Roche Road and also began selling motor cycles, becoming an agent for manufacturers including Enfield, B.S.A. and Sunbeam. In 1924 he acquired the Austin franchise, the beginning of a business relationship with the marquee that would last for almost half a century.

77 Fore Street, Bugle, St. Austell, PL268PD

M R Autos

5.0/5

We have been established for over 7 years and in that time have built up a great reputation. We pride ourselves with great customer care, honesty and reliability whilst still low and competitive pricing. We go out of our way to help out our customers and make sure they go away happy with the services we have provided them, Members of the good garage scheme check out our excellent reviews.

Unit 20G Long Rock Ind Est, Penzance, TR208HX

Threemilestone Garage

4.8/5

Here at Threemilestone Garage we aim to give our customers the best possible service. We have a reception/waiting area with free tea, coffee, hot chocolate, a water machine and Wi-Fi at your disposal. We have a full MOT and repair station. We also now have a full body repair and spray shop.

3C Threemilestone Ind Est, Threemilestone, Truro, TR49LD

A30 Auto Service Centre

4.7/5

RAC Approved Car and Van specialist Service Centre with over 75 years of experience, We also offer MOT, Servicing, and light repair for all other vehicle types. Our highly skilled technicians are dedicated to ensuring your vehicle is running smoothly and efficiently. Contact us today to schedule your appointment and experience the best in automotive care. SERVING ALL AREAS OF CORNWALL INCLUDING ST AUSTELL, BODMIN, WADEBRIDGE, TRURO & VICTORIA CONTACT US TODAY TO SCHEDULE YOUR APPOINTMENT AND EXPERIENCE THE A30 AUTO SERVICE CENTRE DIFFERENCE.

Unit 4B Victoria Industrial Estate, Victoria, St Austell, PL268LX

Xpress Garage & Mot Centre Falmouth

3.7/5

Here at Xpress Garage is the largest independent garage, tyre specialist, and premiere car care centre in Falmouth / Penryn. We are experts in automotive repair including Tyres, Brakes, MOT's, Servicing, Clutches Cambelts, Electrical advanced Diagnostics Air-con, 3d computerised wheel alignment, puncture repairs and full workshop facilities. We're open 6 days a week, from 8.15 am to 5.30 pm Monday to Friday, and 8.15 am to 2 pm on Saturdays. We have a comfortable customer waiting area with FREE hot drinks, TV superfast wifi, and knowledgeable friendly staff. We also offer FREE courtesy cars, and a FREE drop off and pick up service to your home or place of work. We are also RAC, AA certified garage with Motorcodes, RMI & Trust my garage Approved Repair Centre, in Falmouth/Penryn. ISO 9001 Accredited

Xpress Garage And Tyre Centre, Units 3-4 Tregoniggie Industrial Estate, Falmouth, TR11 4SN

Frequently asked questions on car diagnostics

How much does it cost to diagnose a car problem?

The cost you pay can vary depending on the type of car and how complicated the diagnostic test. Check with your mechanic for a quote.

Is a car diagnostic test worth it?

Yes, a diagnostic test may save you a lot of money. It finds issues early before they become costly repairs. It can also keep your vehicle running efficiently and safely.

Can I do a car diagnostic myself?

While you can buy a diagnostic tool, interpreting the results needs expertise. It’s best if you to have a professional mechanic perform the test.

How long does a car diagnostic test take?

Diagnostic tests take from 30 minutes to a few hours. This depends on what issues are being looked at.

What are common car diagnostic codes?

Common diagnostic trouble codes include:

P0300: Random/Multiple Cylinder Misfire Detected
P0420: Catalyst System Efficiency Below Threshold
P0171: System Too Lean (Bank 1)

These are general examples, so your car may have different codes. Always check with a mechanic so you get an accurate diagnosis.

Is a car diagnostic test necessary for a service?

Yes, they are. Regular diagnostics can help keep your car in good health. It makes sure that underlying issues are addressed quickly, so you can drive with peace of mind on the road.

Again, keep in mind that mechanics might have their own checklists. Chat with your mechanic to be sure that they address any specific issues you have.