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.

AdBlue

14 Jun 2026 2 min read

AdBlue no-start countdown on a Mercedes Sprinter: what P204F means

A Mercedes Sprinter showing 'starting prevented in X miles' almost always points at the AdBlue system. Here is what P204F means and how the fault is repaired.

DPF Cleaning

10 Jun 2026 2 min read

Blocked DPF on a Ford Transit Custom: symptoms, diagnosis and the fix

A Ford Transit Custom in limp mode with the DPF light on is one of the most common jobs we see. Here is how we diagnose a blocked DPF and clean it properly.