P1113 fault code C5 HPi (petrol)

birstall · Post by **birstall** » 14 Jun 2010, 13:15

After getting a P1113 fault code I took the car to the dealer and he said that the LP fuel pump was only delivering 3.5 bar when it should be doing 5 bar. First job therefore was to change the LP fuel pump.

Bought one from GSF and had my local mechanic fit it.

This did not cure the problem.

However, the dealer had said that he couldn't check the HP pump because this relies on getting sufficient pressure from the LP pump to work properly.

What happens is that I get the "Anti Pollution Fault" message followed by the "ESP/ASR not functioning" after I go above 2000rpm. The car then drives OK but won't go above 2000rpm.

If I start the car and leave it idling, it cuts out after about 2 minutes (less if I restart). Once I've driven it and got the two warning messages, I can then leave it idling and it doesn't cut out.

Can anyone confirm that this is the HP pump or do I need to take it back to the dealer for confirmation?

I also had a broken breather pipe at the same time the problem occurred (which I fixed back together), but assume that this is just co-oincidence?

Clogzz · Post by **Clogzz** » 14 Jun 2010, 15:52

The motorised throttle has 3 vacuum tubes that rely on a green O-ring to keep the vacuum in.
One is for fuel tank venting, the next for rocker cover venting, and the big one for the brake servo.
If they are slightly loose, they will let air into the vacuum, and may cause the engine to stall.
If they are very loose, you should hear them hissing.

I’ve wrapped Teflon tape around the inlet tubes to tighten the sealing of the O-rings, and it’s paying off for now, until they get a proper job.
These plastic hoses are designed for very quick slap-together, and can’t last like good rubber hoses with worm-driven hose clamps.

colinxm · Post by **colinxm** » 14 Jun 2010, 16:12

What equipment are you using to read the codes ? P1113 is telling you: "Intake air temperature (IAT) sensor circuit open/short".

If you can get access to a Lexia diagnostic setup it will give you much more detailed information of what's happening and when. Maybe there's another forum member not too far away from you with a Lexia that wouldn't mind hooking it up for you. Chinese copies are also available on ebay for not too much money if you're considering doing much maintenance yourself - I bit the bullet a while ago and bought one, it works great !

Good luck, Colin.P

birstall · Post by **birstall** » 14 Jun 2010, 16:26

Thanks for your replies.

The dealer told me P1113 relates to the high pressure fuel system on these models. He's had it on a Lexia but had to diagnose the problem using a pressure guage as the Lexia didn't give the required information (ie LP fuel pump outlet pressure).
Unfortunately, the printout he gave me tells me less information than I can get with my own reader, so seems like £94.00 spent for not a lot!

I have a simple diagnostic tool myself and I'm getting a reasonable and variable reading for the Intake Air Temperature so assume this is OK.

I'll have another look at the breather hoses tonight in case I've missed something.

Clogzz · Post by **Clogzz** » 14 Jun 2010, 16:36

My air intake temperature sensor measures 900 Ohms when hot, and 3500 when cold, so it’s negative-going.
The car goes without it, and air temperature faults cannot stall the engine.

wheeler · Post by **wheeler** » 14 Jun 2010, 17:56

The HP fuel pumps on the HPi engine are very common failures, they are quite expensive but luckily very easy to fit.

birstall · Post by **birstall** » 14 Jun 2010, 22:40

Checked breather pipes and these all seem OK.

Went for a spin and checked fuel pressure reading. Seems to vary quite a bit but running around 2.8 bar with jumps up to 5 bar when coasting.

The LP pump delivers 5 bar nominal.

Does this mean that the HP pump is not kicking in?

wheeler · Post by **wheeler** » 15 Jun 2010, 09:06

The corect pressure reading is listed as 5 bar, Was the pump you got from GSF a complete unit with pressure regulator & level sensor or just the motor ?

birstall · Post by **birstall** » 15 Jun 2010, 11:53

Wheeler

It was the full unit with the level sensor on the bottom.

I didn't actually examine it for the pressure regulator, but assume this was there somewhere.

I can check the old unit to see since I still have this.

Cheers

birstall · Post by **birstall** » 16 Jun 2010, 16:57

It looks like you can only get the HP pumps from a Citroen dealer.

Not sure that it's worth risking a unit from a breakers yard (if I could even get one).

I've been offered 15% discount from a Citroen dealer so I may just have to bite the bullet!

Then the daunting prospect that this may not clear the fault!

Anybody know if its worth dismantling and checking the existing unit before I go ahead. It seems to be all mechanical, so presumably should show signs of wear if examined closely?

MikeT · Post by **MikeT** » 16 Jun 2010, 18:03

I don't know if this applies (please ignore if not) but someone recently informed me their fuel regulator was dirty and cleaning it fixed the low pressure fault.

birstall · Post by **birstall** » 23 Jun 2010, 00:04

MikeT

Thanks for the tip.

Yes, the regulator may be dodgy. but there is possibly a different error message for the regulator. Do you know which error message your friend was getting?

I've managed to get hold of a pump from a breaker who had agreed to take it back if it didn't fix the problem.

Unfortunately, it's turned out to be a diesel pump! Very frustrating!

And from a Peugeot/Citroen specialist!

A problem with a fitting a second hand pump is that you can't buy the seals separately from Citroen. They only come with a new pump.

So it looks like I'll have to go for a new pump. I'll consider cleaning the regulator first, though.

birstall · Post by **birstall** » 04 Jul 2010, 15:10

OK, I fitted the high pressure pump yesterday and it cleared the fault.
The car seems to be running a lot smoother now.

The pump is only about the size of a small oil filter, and very easy to fit (thanks for the heads up!) but cost me £455 inc VAT after discount (Ouch!).

However, I have a problem with the seal on the low pressure pump, but I'll post that under a new topic.

Thanks for all the advice.