View Full Version : Opel Omega 2.2 DTI P1631

17th September, 2014, 08:11 AM
Hello, I got Omega 2.2 DTI 88 kW with P1631 fault. The car starts fine, but the problem - limp mode, max fuel dosing is 20 mg... When I erase this fault and switch ignition off then on, there are no faults, but when I lock and unlock the car there is P1631 (Replace injection pump)... And the car is in limp mode.

I checked the wiring, changed the pump electronics.... Same fault exists. My question would be if someone could remove this limp mode? Its EDC15M ECM.

17th September, 2014, 08:41 AM
The correct fault code is P1631 Injection Pump Malfunction 1... The fuel dosing is limited to 20 mg, and turbo is 5 % on.

17th September, 2014, 08:47 AM
Only repair pump

17th September, 2014, 09:01 AM
Incredible, if pump is faulty need repair pump, not hide fault.

17th September, 2014, 09:35 AM
The car starts fine, the injection quantity and timing sets as the ECM requests everything is fine, just the limp mode....

Google gives translafe for this fault:
P1631 Injection Pump Malfunction 1 Injection pump control unit hardware failure (EEPROM defective)
Injection pump control unit hardware failure (A/D converter defective).
Engine is stopped.

I dont see no "side effects" as described (Engine is stopped), just the limp mode...

17th September, 2014, 10:27 AM
there is 7 variants of this fault , 5 with stop engine , 2 with limp mode , one of this :

Injection pump control unit hardware failure


Maximum performance will be reduced.