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28602948 — Symptoms & Failure Modes

Common symptoms and verified failure modes of a failing Delphi 28602948 2.0 BlueHDi / TDCi (DW10) Common Rail Injector.

Crank but no start (often after fuel-system work or running low on fuel) · high

A leaking/sticking Delphi injector bleeds rail pressure during cranking so the engine cannot reach firing pressure.

Hard starting when cold · high

Excessive back-leakage lowers cranking rail pressure.

Misfire / rough idle · medium

An out-of-balance injector under/over-fuels its cylinder.

Loss of power / limp mode · medium

Rail-pressure or injector-correction faults trigger ECU derate.

Black smoke and increased fuel consumption · medium

Poor atomisation from worn nozzle.

Diesel knock / uneven running · medium

Incorrect delivery timing/quantity.

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