Rover 45 2.0 Diesel Fault Code PO0251

[Spydaman]

My Lads Rover 45 is dead and was towed home by the RAC. The engine light is on with a fault code PO0251 Injection Pump Fuel Metering Control A Malfunction. I read that the EDU on the pump is prone to failure and can be repaired for £40. I took it off but the ribbon cable between it and the pump broke. I fitted another pump but it's still dead. I'm sure its something simple like a fuse or bad connection but where to look? Any clues?

[Emanresu]

So you broke the cable?

Test continuity from pin to pin on each end.

This is the first thing you should do before even suspecting a faulty pump.

[Spydaman]

The cable that broke is the ribbon cable inside the pump not the wiring loom on the outside. The ribbon cable can't be repaired or replaced hence the replacement pump. Any other suggestions where to look?

[GreenV8S]

I googled the fault message you posted and the first hit took me to a page talking about the fuel metering pump on the side of the engine. I suggest you do some research and see what the fault code actually means,

[Spydaman]

Really? I didn't find anything useful which is why I asked here. Can you post a link to it.

[GreenV8S]

Google is showing me pages of links to technical information that seems relevant. I'm surprised it isn't showing you the same. Here are the first few:

https://www.obd-codes.com/p0251
https://www.2carpros.com/questions/gmc-savana-p025...
https://www.yourmechanic.com/article/p0251-obd-ii-...

One of the articles mentions air in the system as a possible cause, and that seems quite likely in your case since you replaced the pump recently.

[Mr2Mike]

Was the replacement pump correctly locked when you bought it? If not then the pump timing is probably wrong.

[Spydaman]

The pump was locked with a drill through the pulley into the body and the crank was locked with a similar drill into the flywheel as described in the Haynes manual. Does that sound right?