Workshop Blog

Real jobs, symptoms, fault codes and fixes from our Devon workshop, plus practical advice on DPF cleaning, AdBlue and SCR faults, and ECU remapping.

Auto-Cleanse three circular dashboard warning icons labelled engine management, DPF filter and glow plug, each with a short explanation, below a soot-caked filter body

DPF Cleaning

10 Aug 2026 5 min read

DPF Warning Lights: What Each One Actually Means

Filter light, engine-management light, flashing glow-plug light or limp mode - what each warning is telling you about a diesel particulate filter, and what to do next.

Auto-Cleanse torque against RPM chart with an orange remap curve above a grey stock line, beside a panel van labelled load and towing, plus four icon cards

ECU Remapping

3 Aug 2026 5 min read

Van and Commercial Remapping: Towing, Payload and Gearing

Commercial vehicles are remapped for how they behave loaded, not for a headline power figure. Here is what that means, and where the limits sit.

Auto-Cleanse four stacked panels labelled soot value, ash value, fault memory and differential pressure with reset, clear and verify buttons beside a cutaway DPF filter

DPF Cleaning

27 Jul 2026 5 min read

After a DPF Clean: Resets, Relearns and What to Verify

Refitting a cleaned DPF is only half the job. Here is what to seal, reset, measure and road test so the ECU is working from an accurate picture.

Auto-Cleanse odometer above four ticked pre-remap checks covering compression and health, turbo condition, clutch and gearbox and DPF or EGR state, beside a tachometer dial

ECU Remapping

20 Jul 2026 5 min read

Remapping a High-Mileage Vehicle: What to Check First

High mileage on its own does not rule out a remap. Here is what actually wears with age, why raised torque finds it, and when the honest answer is to repair first.

Auto-Cleanse dosing injector spraying onto an exhaust pipe ringed by white urea crystals, above icon cards reading causes blockages, affects accuracy and triggers faults

AdBlue

13 Jul 2026 5 min read

AdBlue Crystallisation and Dosing Faults

White crystalline deposits around an AdBlue injector are evidence, not the fault. Here is why urea crystallises, what causes it, and what to check.

Auto-Cleanse two injector nozzle illustrations comparing a fine atomised spray over a bright flame with coarse droplets and a weak burn, labelled atomised and poor spray

DPF Cleaning

6 Jul 2026 5 min read

Injector and Fuelling Faults Behind Excess Soot

Worn injectors, wrong correction values and low rail pressure can all raise soot output. Here is how fuelling faults reload a DPF and dilute engine oil.

Auto-Cleanse orange diesel card listing fuel quantity, injection timing, rail pressure and smoke limit over a turbocharger, beside a blue petrol card listing lambda, ignition, boost and knock control

ECU Remapping

29 Jun 2026 5 min read

Diesel vs Petrol Remapping: Different Routes to More Power

Diesel and petrol engines are limited by different things, so the same power goal needs a different calibration route on each. Here is why the approaches diverge.

Auto-Cleanse turbocharger compressor wheel with sparks escaping a clamped hose joint and a boost leak callout reading lost boost equals more soot

DPF Cleaning

22 Jun 2026 5 min read

Turbo and Boost Faults Behind DPF Problems

Boost leaks, a sticking VGT mechanism or an implausible air signal can load a DPF faster than it clears. Why air-side integrity belongs in DPF diagnosis.

Auto-Cleanse two comparison panels: compliance badges for emissions standard, lower emissions and MOT pass labelled cleaned and legal, versus a red cross labelled removed and MOT fail

DPF Cleaning

15 Jun 2026 5 min read

DPF Removal and the Law: Why We Clean Instead

Removing a DPF from a road vehicle is not a legal repair in the UK. Here is where the law actually sits, and why cleaning restores the filter properly.