11A002

What the Code Means

Code 11A002 flags a high-pressure fuel pump (HPFP) malfunction. The pump delivers fuel to the rail under high pressure, and the DME evaluates its operation by the actual pressure in the system.

Based on the source data, there can be three causes: mechanical wear of the pump itself, electrical problems (connectors, wiring, power supply), and contamination of the fuel system. In any of these cases the pump fails to deliver the required pressure, and the control unit logs the fault.

Symptoms

• Long engine cranking — the pump doesn't build working pressure right away, so the starter motor has to turn longer than usual;
• misfires due to insufficient fuel pressure in the rail;
• power loss, especially noticeable under load when fuel consumption is high and the pump can't keep up.

Diagnosis and Repair

1. Check actual fuel pressure with a gauge or through the diagnostic system — compare it to the specified value. Low pressure points to the pump or the fuel supply to it.
2. Check the pump's electrical connectors and wiring: corroded contacts or a poor power connection can mimic a mechanical fault.
3. If pressure stays low with the electrics known good, replace the HPFP.

A common diagnostic mistake is replacing the pump without checking the connectors and pressure: the cause may be in the contacts, not the pump itself.

Indirect Issues

The source data for this code records only body damage unrelated to the fuel system:

• a hole below the left sensor; sensor function not verified;
• damage to the top edge of the bumper directly under the trunk lid edge;
• minor scuff marks on the trunk lid.

There's no data in the source on what happens to the engine if you keep driving with code 11A002.