ECU Faults in Vans: Why Peugeot, Fiat and Citroën Need Specialist Diagnostic
The Fiat Ducato, Peugeot Boxer and Citroën Relay share some of the most advanced onboard electronics in the commercial van segment. When something starts going wrong in that network, the symptoms are often subtle at first: a warning light that clears itself, fuel consumption that drifts upward, a van that feels slightly off under load. RACQ responded to 755,000 roadside rescues across Queensland in FY2023, with battery and electrical faults the leading cause. In European vans, battery management is ECU-controlled, meaning many of those callouts trace back to an unresolved electronic fault. This post explains what the ECU actually manages, why generic scan tools miss more than most owners realise, and what specialist diagnostics finds that a basic scan does not.You said: too long