Vehicle Diagnostics & Warning Light Checks in Taunton

Why prompt diagnostics matter

A dash warning light usually signals something that needs attention — from a loose cap to an engine or emissions fault. Early diagnosis prevents small problems becoming costly failures, keeps you safe, and helps avoid breakdowns.

What our diagnostic service includes

• Full ECU scan and fault code readout (OBD-II)
  
  

• Live data monitoring (boost, fuel trims, sensor voltages, etc.)
  
  

• Visual inspection of suspected components (sensors, wiring, connectors)
  
  

• System-specific checks (ABS, airbags, transmission, immobiliser)
  
  

• Road test where needed and post-repair verification
  
  

• Clear written quote and explanation before any repair work
  
  

Common warning lights and what they often mean

• Engine / Check Engine Light (MIL): sensor, misfire, emissions or fuel problems
  
  

• ABS / Brake light: ABS sensor fault, low fluid, or brake system issue
  
  

• Airbag / SRS light: safety restraint system fault — treat as urgent
  
  

• Transmission / Gearbox light: shifting faults or transmission sensor errors
  
  

• Battery / Charging light: charging system or alternator issue
  
  

• Oil pressure / Temperature (red): stop driving immediately — risk of severe engine damage
  
  

How long does a diagnostic take & what does it cost?

We charge £55 per hour. Most diagnostics need 30–90 minutes depending on complexity. Simple code reads can be quick; intermittent or complex faults (e.g., intermittent misfires or CAN bus issues) take longer to isolate. We’ll provide a clear estimate before any work.

Can I keep driving with a warning light on?

• If the light is red (oil pressure, temperature, severe braking): stop safely and call us.
  
  

• If the light is amber/yellow (check engine), you may be able to drive carefully to the garage, but avoid high speeds or towing. When in doubt, call and we’ll advise.
  
  

What to bring / what helps diagnosis

• Vehicle registration & mileage
  
  

• Recent service history or fault notes (when did it start?)
  
  

• Any recent repairs or fluid top-ups
  
  

• If the light comes and goes, describe the driving conditions when it happened (cold start, motorway, idling)
  
  

Typical fixes after diagnostics

• Sensor replacement (O2, MAF, MAP, ABS)
  
  

• Wiring repair/corrosion clean up and connector reseating
  
  

• Emission repairs (EGR, DPF related)
  
  

• Ignition/coil or fuel system repairs (misfire)
  
  

• Transmission sensor or fluid service recommendations
  
  

Why choose MJ Auto Centre for diagnostics

• Fast, experienced technicians who explain faults in plain English
  
  

• Honest, written quotes before work begins — no surprises
  
  

• We can advise on urgency and safety (and if towing is required)
  
  

• Local garage serving Taunton & Bishops Lydeard — cars & light vans only
  
  

Urgent? What to do now

Call us now - Tell us the warning light shown and any symptoms (noise, loss of power, smells). We’ll advise whether you should stop driving and arrange the quickest diagnostic slot.

From fault codes and warning lights to performance issues, we’ll help you sort it – without the dealership price tag.

Call MJ Auto Centre today to book your diagnostic check.

📍 Find Us 

MJ Auto Centre  

Unit K, Dene Business Park  

Dene Rd, Bishops Lydeard  

Taunton, TA4 3LQ

📞 Phone: 07542 084896  

🕒 Opening Hours: Mon–Fri: 8:30am – 5:30pm  

📧 Email: mjautocentre@yahoo.com