Symptoms of injection pump failure – how to recognize a problem with the diesel pump?

Symptoms of Diesel Injection Pump Failure – How to Recognize the Problem?

The injection pump is the heart of the fuel system in a diesel engine. Its failure manifests itself in a specific way, which is worth knowing so as not to delay a visit to the service center. Early diagnosis helps avoid costly engine repairs.

The most common symptoms of VP44 injection pump failure

• Lack of power - the engine does not reach full speed, responds poorly to gas
• Black or white smoke from the exhaust pipe when accelerating
• Difficult starting - the engine turns the starter for a long time before it starts
• Uneven engine operation at idle speed
• Sudden engine stop while driving
• Increased fuel consumption for no apparent reason

OBD2 error codes indicating the injection pump

Brand	Error code	Description
Opel / Saab	P1631	VP44 controller damaged
VW / Audi	00550	VP44 pump controller damaged
VW / Audi	00628	Control transistor failure
VW / Audi	01268	No fuel injection coil control
Ford	P0216	Fuel dosing fault

When is regeneration needed and when is replacement needed?

Most VP44 pump failures are due to damage to the controller (transistor, PCB) or wear of mechanical components (dosing valve, seals). Regeneration is cheaper than replacing a new pump and is equally effective while maintaining the appropriate quality of repair.

How do we diagnose the pump in A-Core?

• Reading error codes with an OBD2 diagnosticscope
• Mechanical test on the Bosch EPS 715 test bench
• Measurement of EDC controller parameters in an electronics laboratory
• Full diagnostic report for the customer

What to do if symptoms appear?

Don't wait - failure of the VP44 injection pump may lead to damage to the injectors and the entire fuel system. Call: +48 504 511 170 (Mon–Fri 8:00–16:00). Street Jasna 25, 44-100 Gliwice.