Engine diagnostics
Engine diagnostics and warning lights
A diagnostic check reads the fault codes stored by your car’s computer and then tests the parts involved to find the real cause. A code points to a system, not always to a faulty part. Modern Motors in NW3 investigates warning lights, misfires, power loss and starting problems, then explains the fix and price.
What’s included
What our engine diagnostics covers
- Fault codes read from the engine and other control units
- Live data checked while the engine runs
- Physical tests to confirm the cause
- Plain-English explanation and repair quote
- Codes cleared and the fix confirmed after repair
Why it matters
Why choose Modern Motors for engine diagnostics
- 01
No guesswork
We confirm the fault before replacing parts, so you do not pay for the wrong ones.
- 02
Catch it early
A warning light dealt with now is usually cheaper than a breakdown later.
- 03
Straight answers
You will know what is wrong, how urgent it is and what it will cost.
The process
How it works, step by step
- 1
Tell us the symptoms
Which light, when it came on, and anything the car is doing differently.
- 2
Read the codes
We connect our diagnostic equipment and read the stored faults.
- 3
Test the cause
We check the components behind the code to confirm what has failed.
- 4
Repair & confirm
With your go-ahead we fix it, clear the codes and re-test.
Common reasons drivers come in
- Engine management (check engine) light
- Misfiring, juddering or loss of power
- Car struggles to start
- Higher fuel use than normal
- Limp mode
Not sure? Call 020 7586 3580 and describe it – we will tell you if it can wait.
Can I keep driving with the engine warning light on?
If the light is steady and the car feels normal, drive gently and get it checked soon. If it is flashing, or the car is losing power, misfiring or overheating, stop as soon as it is safe – a flashing light often means a misfire that can damage the catalytic converter.
Does a diagnostic check tell you exactly what is wrong?
Not on its own. A fault code tells us which system has reported a problem, such as a sensor reading out of range. It may be the sensor, the wiring or the thing it measures. That is why we follow the code with tests to confirm the actual cause before replacing anything.
Will an engine warning light fail an MOT?
Yes. Since 2018 an illuminated engine management light is an MOT failure on cars that have one. Other warning lights, such as ABS, airbag or brake fluid warnings, can also cause a fail. Getting the fault diagnosed before your MOT saves a retest.
Local
Engine diagnostics for drivers across Camden
We are at 95 Adelaide Rd, London NW3 3XX. Drivers come to us for engine diagnostics from Belsize Park, Chalk Farm, Primrose Hill, Swiss Cottage, Hampstead, Camden Town, Kentish Town and Gospel Oak.
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Book your engine diagnostics
Book online in two minutes, call 020 7586 3580 or send us a WhatsApp. 95 Adelaide Rd, London NW3 3XX.