28231462 — Technical Research
Delphi solenoid common-rail injector for the VW 1.2 TDI (engine CFWA, Euro 5) fitted to the VW Polo V, Skoda Fabia II / Roomster and Seat Ibiza. VW OE 03P130277. Each injector carries a 20-character IMA/adaptation code that must be converted and written to the ECU (adaptation channel 10) with VAG ODIS/VCDS. Failures are driven by poor fuel filtration, contamination and back-leakage wear. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Water-in-fuel corrosion; Nozzle coking.
Delphi 28231462 1.2 TDI (CFWA) Common Rail Injector (VW Polo / Skoda Fabia-Roomster / Seat Ibiza)
Delphi solenoid common-rail injector for the VW 1.2 TDI (engine CFWA, Euro 5) fitted to the VW Polo V, Skoda Fabia II / Roomster and Seat Ibiza. VW OE 03P130277. Each injector carries a 20-character IMA/adaptation code that must be converted and written to the ECU (adaptation channel 10) with VAG ODIS/VCDS. Failures are driven by poor fuel filtration, contamination and back-leakage wear. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Water-in-fuel corrosion; Nozzle coking.
A leaking injector unbalances cylinder fuelling on the 1.2 TDI.
Excess back-leakage drops cranking rail pressure.
Out-of-range delivery or rail-pressure deviation cuts power.
Poor atomisation over-fuels the cylinder.
Cylinder-specific injector or fuel-metering codes.
- InstallationConvert and write the 20-character IMA code to the correct cylinder (adaptation channel 10) with VAG ODIS/VCDS before road test.
- InstallationRenew the combustion seal and clamp hardware; torque to spec.
- MisdiagnosisRead live back-leakage data to find the weak cylinder before removal.
- WarningDo not mix genuine and aftermarket injectors on the 1.2 TDI; fix contamination first.
- TestingBench-test on a Delphi-capable CR tester across delivery and back-leakage points before refit.
What is Delphi injector 28231462?+
A Delphi solenoid common-rail diesel injector for the VW 1.2 TDI (CFWA) engine. VW OE 03P130277.
Which vehicles use 28231462?+
VW Polo V, Skoda Fabia II/Roomster and Seat Ibiza with the 1.2 TDI (CFWA) engine, roughly 2009-2015.
Is it solenoid or piezo?+
It is a Delphi solenoid common-rail injector.
Does 28231462 need coding?+
Yes - convert and write the 20-character IMA code (adaptation channel 10) with VAG ODIS/VCDS when fitting.
What is the OE part number?+
VW 03P130277 references Delphi 28231462.
Can I mix it with aftermarket injectors?+
It is not recommended - the 1.2 TDI runs best with a matched, correctly-coded set.
What are the symptoms of failure?+
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my 1.2 TDI run rough?+
A worn or leaking injector unbalances fuelling; read live back-leakage data and bench-test the weak cylinder.
What causes these injectors to fail?+
Poor fuel filtration, contamination and back-leakage wear - fix the cause first.
Does a remanufactured 28231462 perform like new?+
A properly remanufactured injector is bench-tested and recalibrated to the Delphi plan, then IMA-coded on fitment.