Astra and Zafira diesel (Isuzu design). Durable, but the EGR and VGT turbo love carbon, and glow plugs snap on removal.
Click a code for the full breakdown: symptoms, causes, and whether you can keep driving.
Turbocharger Underboost
The turbo is producing less boost pressure than the ECU requests.
EGR Flow Insufficient
The exhaust gas recirculation valve is not flowing enough exhaust back into the intake, usually due to carbon buildup.
Diesel Particulate Filter Efficiency Below Threshold
The DPF is not trapping soot as it should - it may be damaged, removed, or overloaded.
Glow Plug Module Control Circuit (Diesel)
The control circuit of the diesel glow plug module has a fault.
Fuel Rail/System Pressure Too Low
Measured fuel pressure is below what the ECU commands - the engine may be starved of fuel under load.
Find a trusted repair shop nearby and book a diagnostic visit online.
Find a repair shopGet the app, plug in an OBD2 adapter and ask Motoro AI what this code means. It checks your car live and tells you what to do next.
