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really need help with fault codes

cupra-rich

cupra-rich

Active Member
Dec 28, 2008
423
0
coventry
ok so i keep getting these fault codes

17932 fuel pump relay (j17) open or short to ground

19561 valve for intake manifold open or short to ground

18080 - Coolant Fan Control 1: Open or Short to Ground

already been to vag independant garage where the fuel pump relay's been replaced also changed n75 valve, also they checked all the wiring on the circuit, where they found a lose connection (node)in the ecu. cleaned all earthing points to the car. so i thought this was all fixed till i go out in my car today and it goes into limp mode again [:@] with the same code's as above.

any help or idea's on where we should be looking next?
 
thanks for the links but have searched google and ross tech for hours with no luck on solving this issue.

http://wiki.ross-tech.com/wiki/index...2/P1524/005412 have changed relay and checked wiring

http://wiki.ross-tech.com/wiki/index...1/P3105/012549 could this be the egr valve? if so ive deleted & mapped this out.

http://uk-mkivs.net/forums/t/235984.aspx never really use the air con.

i paid 2hours labour to garage to look & check all wiring regarding these code already, think they are going to be as baffeld as me when i take it back on monday:banghead:
 
been out today got another 2 fault codes aswell as the ones above.

17849 EGR valve open circuit short to ground. have delete pipe thats been mapped out

17957 - Boost Pressure Regulation Valve (N75): Open or Short to Ground. have changed n75 and had wiring checked

all pointing to an electrical fault but have no ideas left on where to look as garage says they have checked all wiring.:confused:
 
cupra-rich said:
ok so i keep getting these fault codes

17932 fuel pump relay (j17) open or short to ground

19561 valve for intake manifold open or short to ground

18080 - Coolant Fan Control 1: Open or Short to Ground
Click to expand...


Any further news on this problem please?

I currently have the exact same faults that you listed (the 3 above plus the 2 others you mentioned also).

After clearing the codes, car will drive ok for a short while before going into limp mode and presenting the same five codes on scanning.
 
well i'm still having problems. i have done a number of thing's to try & cure this as follows.

replace n75 & fuel pump relay.

all earths cleaned & checked

n75 block connector bypassed. (to check that fault was'nt at the connector)

checked all wire's into the ecu and replaced both connector's into it. ( i found that i could make the code's come back at will by pushing & pulling at these connector's)

have just sourced an 2nd hand ecu as thats about the only thing left to check.

not sure wot i'm going to do if that fails,have spent many hundred's of pounds just to get to this point:cry:
 
Thanks for the info.

Doesn't sound too promising.

Let us know how the replacement ECU goes!
 
had the ecu changed by nick @ r tech in hinckley today, no fault code's as yet so fingers crossed that a replacement ecu has done the job. :clap: :clap: :clap:
 
Wow, that's great news mate.

I guess you'll need to give it a few more days yet to be sure though.

At least I've got something to tell my mechanic now - he's been as baffled as me so far!

Does anything else need to be done as well, or is it simply a case of swapping the ECUs over?
 
LEE69 said:
Let's hope it cures it, not totally unheard of them going wrong, but not many on here in the years i have been on.
Click to expand...

yeah tell me about it! spent hour's serching thu goggle not a mention of the five fault codes together. my tuner was positive it was'nt the ecu as he had never heard of this before, until i pushed and pulled at the connectors onto the ecu and made the faults come back at will.
 
michael2008 said:
Wow, that's great news mate.

I guess you'll need to give it a few more days yet to be sure though.

At least I've got something to tell my mechanic now - he's been as baffled as me so far!

Does anything else need to be done as well, or is it simply a case of swapping the ECUs over?
Click to expand...

yeah mate will have to drive it for a week or two before i'm totally convinced its a fix.

no not a straight swap, will have to swap over immobilizer chip to the new ecu, or get it coded not sure what that involves tho.
 
cupra-rich said:
no not a straight swap, will have to swap over immobilizer chip to the new ecu, or get it coded not sure what that involves tho.
Click to expand...

Ok, cheers.

If yours appears to be the answer, I might send mine off to be refurbed instead.
 
At first, my mechanic just cleaned up the connectors to the ECU, and this appeared (briefly) to solve the problem. It wasn't long however before the dreaded EML came on again and car went into limp mode.

Initially I was able to clear the codes (using my cheap hand-held scanner) to give myself some driving time, but the problem gradually got worse as the week went on, and it eventually became almost impossible to keep the car going. Lots of hesitation/misfiring and the engine cutting out at low revs.

I'm currently hiring a new 1.2 litre Polo to get to work. Not as nice to drive but at least I can sleep at night!

Even though I really need a diesel (in future) for fuel economy, I'm wondering whether to go back to a petrol car next time - might be less trouble with higher mileage on engine.
 
sound's very similiar to mine, lets hope its a fix for both of our cars.
update this thread when you have sorted the ecu. good luck. :thumbup:
 
cupra-rich said:
sound's very similiar to mine, lets hope its a fix for both of our cars.
update this thread when you have sorted the ecu. good luck. :thumbup:
Click to expand...


Your car still running ok mate? Any more fault codes?

Had my ecu sent off to be tested and got a phone call today to say that it appears to be working fine - no faults found. So now I'm back to square one! :cry:

My mechanic is convinced the problem is electrical. He's narrowed it down to pin no. 5 on the ecu - the one which connects all five of the components (as mentioned before) that are being thrown up as fault codes.

The only thing he can think of now is that there might be a junction somewhere back in the wiring loom where the individual wires from these components all join together, before making their way up to the ecu, and perhaps there's a dry joint or whatever in the junction. (He hasn't found that yet though).

It seems strange that you had the exact same five fault codes and that the replacement ecu seems to have solved the problem with yours. I'm hoping the test of my ecu hasn't somehow missed a fault!

How about getting your original ecu sent off for testing? If it also comes back clear, it suggests I might still need a new ecu after all.

I'm going to have to get something sorted soon - this hire car is getting expensive!
 
Yeah my car is still running fine.

might be cheaper to get a replacement ecu than paying an auto sparky's hourly rate to check all the wiring, after all we got the same fault code's so should be the same fix:think:

left my old ecu at the tuner i use so he can use it as spare's so cant send it off to be check for you.

if you near the midlands i'm sure my tuner would be happy to swap over your ecu.
 
Glad to hear your car is still going well.

I just got a phone call this afternoon saying that the problem is finally found and repaired!

I didn't go into too much detail, but apparently it was a simple wiring fault - on the main/shared wire, carrying signals from those five separate components into the ecu. I'll probably start believing it after the eml has stayed off for a few days. (Getting it back for the weekend).

So it appears we had the same fault codes but with (hopefully) different causes.

What a nightmare this has been!
 
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