406hdi 110 2003 Rapier

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406hdi 110 2003 Rapier

Postby charliedog » Thu Apr 20, 2017 9:29 pm

Please if anyone can help me it would be really appreciated.

I am at the end of my tether with the diagnosis of a fuel problem

The car decided to stop without any warning with "Anti Pollution Fault" displayed on the MFD. After removing the key and waiting 10 seconds the car restarted but only ran for a short time before cutting out. This happened time and time again. I ran it very slowly but when I put my foot down the car stopped.

A diagnostic check revealed the following:

P0230 - Low pressure pump short cct - open or short cct to earth

P1112 - High pressure diesel Monitoring lack of pressure (leak)

I have removed the HP fuel regulating valve which looked ok and replaced the 2 x small o rings. The bottom ring split when I tried to fit it.

I have been on ebay looking for a repair kit and possible replacement valves but they are expensive

If anyone has any advice or can help in any way I would be grateful. I live in Waterlooville in Hampshire and trying to find a diesel doctor who may be able to help but no luck so far

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Re: 406hdi 110 2003 Rapier

Postby GingerMagic » Thu Apr 20, 2017 11:06 pm

Sounds like your lift pump to me, but I'm no mechanic....
The lift pump is in your fuel tank, accessed via a hole under the rear seats. This pump ( sometimes called in-tank pump ) supplies the main HP fuel pump in the engine bay - these pumps work in unison, if either goes wrong then you have a non start issue.
First thing to check would be the wiring on and connected to the lift pump, as Diagnostic's shows a wiring issue...

To help you determine if this pump works or not you should hear this pump run for about 5 seconds when you put the ignition on, and also a whooshing noise in the engine bay as the fuel pressure is built up in the fuel filter bowl.
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Re: 406hdi 110 2003 Rapier

Postby PeterN » Fri Apr 21, 2017 12:21 am

I would concur. The pressure regulator on the back of the HP pump can give problems, they are quite easy to fit and not to expensive on ebay, if the in tank pump is OK that's probably the next thing to go for. The fuel filter is another one to go for if it hasn't been changed lately.

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