Diagnostics and electrics on the AP-7 at Granollers

Diagnostics and electrics

We carry multi-brand diagnostic equipment to read and clear codes on both tractor and trailer. We resolve the faults that force limp mode: AdBlue system and NOx sensor, air mass meter, camshaft sensor, injection and boost pressure. We also repair lighting, marker lamps, earths and trailer connectors.

Mobile diagnostics is not plugging in a scanner: it is interpreting what the ECU says in context. The same P-code can be a filthy sensor or a genuine mechanical fault behind it; telling them apart at the roadside prevents blind parts-swapping, which is how absurd invoices are born.

We work with heavy-vehicle-specific tooling (not passenger-car generics) able to enter engine, electronic brake, automated gearbox and body modules, backed by a stabilised battery supply so no session ever leaves an ECU half-written.

What never to do

Do not clear the fault codes before we get there
Do not top up AdBlue from unsealed containers
Do not bridge fuses with wire

Limited-power mode. The truck caps speed with no obvious cause: a fault is logged even if you feel nothing.

How it works

A complete read across all ECUs, not just the engine: many crossed faults explain themselves in the brake or gearbox module. We separate historic from active entries, cross-check live parameters (pressures, temperatures, commands) as symptoms occur, and deliver a plain verdict: what fails, what we can fix right now, what needs a workshop.

1
Full-system read
Every ECU on the truck, not only the engine block.
2
Historic vs active
What already healed versus what is failing now.
3
Live parameters
Pressures and commands while the symptom happens.
4
Plain verdict
Fix-now-at-the-shoulder items versus workshop-only ones.

Mode

Roadside diagnostics. Complete read + verdict + post-repair clearing.

Ask for a fault scan at every preventive service even with no lights showing: historic codes tell you what will break next, before it chooses the worst possible kilometre.

AP-7 · Granollers

Half-way along the corridor, this stretch merges the flows coming off the border with those climbing from Barcelona: braking, overtaking and lane changes without pause.

Granollers and Vallès Oriental access. Dense logistics zone, heavy industrial warehousing. Dangerous curve at km 84.

AP-7

13 – 14

Granollers

Cataluña

24/7

24 hours · 365 days

La JonqueraAP-7 · 2 – 4 · 0 km FigueresAP-7 · 5 – 6 · 18 km GironaAP-7 · 7 – 9 · 45 km BarcelonaAP-7 · 15 – 21 · 145 km

Questions about this stretch

Can you come into my warehouse or estate if I can exit the motorway?

Yes — that's the preferred option around Granollers: we attend inside estates and yards whenever the truck can still move a few kilometres. Leaving the motorway also saves waiting time on the shoulder.

How does Vallès traffic affect your arrival time?

Rush hours (7–9:30 and 17–20) add genuine delay. You get an honest window on the call and, if you're near an exit, we propose the exact spot to meet.

Do you cover the C-60 towards Mataró and the C-17 towards Vic?

Yes, both axes start from our exits. Tell us the road and kilometre marker in the first message so we can plan the van's route properly.

Other services at Granollers

Mobile tyre service AP-7 · Granollers Roadside mechanical breakdown AP-7 · Granollers Air suspension repair AP-7 · Granollers Brakes and calipers AP-7 · Granollers Reefer and cooling units AP-7 · Granollers

Diagnostics and electrics on the AP-7, Granollers