Warning light on
Engine, emissions, gearbox or ABS light — find out what it actually means before it grows.
Diagnostics · Daventry
Find the fault, fix the cause.
Dealer-level diagnostics at the Daventry workshop — fault finding, live-data health checks and honest answers before any work is done.
All makes
cars & vans
Live data
not just codes
Plain English
honest reports
Diagnostics
More than a code reader
A warning light tells you almost nothing. The code behind it tells you where the system noticed a symptom — not what caused it. Proper diagnosis means live data, actuator tests and knowing how these engines actually fail, so you fix the cause once instead of replacing parts on guesswork.
Because we calibrate engines for a living, we read them differently. Fuel trims, boost behaviour, rail pressure, airflow plausibility — the same data we use to build tuning files tells us very quickly when a sensor lies, an actuator sticks or a DPF is heading for trouble.
You get a plain-English explanation of what we found, what it costs to put right, and what can safely wait. No drama, no mystery-menu of parts.
At a glance
- Full-system scans across all control units
- Live-data driven diagnosis, not code guessing
- Pre-tune health checks before any remap
- DPF, EGR and sensor fault investigation
- Clear written summary of findings
The result
When to book diagnostics
Down on power
Limp mode, flat spots or lazy boost — live data finds the restriction fast.
Before buying a car
A pre-purchase scan is the cheapest insurance a used-car buyer can get.
Before a remap
Every tune deserves a healthy engine. We check before we calibrate.
How it works
Three steps. One visit.
- 1
Book your slot
Pick a diagnostic slot in the live diary — tell us the symptoms in the notes.
- 2
We investigate
Full scan plus live data on the systems that matter for your symptom.
- 3
You decide
Findings explained in plain English with honest options — fix, monitor or leave.
Good to know
Questions we hear every week.
Can you just clear the light?
We can — but a code that comes back was never fixed. We'd rather spend the time finding out why it set, then clear it knowing it stays off.
My car is in limp mode. Can you help?
Yes — limp mode is the ECU protecting itself, and the trigger is nearly always visible in live data. We diagnose the cause before anything is reset so it doesn't simply return a mile down the road.
Do you diagnose DPF problems?
Yes. Blocked DPFs are usually a symptom — of short journeys, a lazy sensor, an EGR fault or failed regenerations. We find the reason before recommending anything.
Do you check cars before remapping them?
Always. A remap goes on a healthy engine — if the diagnosis finds something that needs attention first, you hear it straight.
Stop guessing. Start knowing.
Book a diagnostic slot in the live diary and get answers in plain English.
Book your slot