Testing engine electronics dash light...

[150HP&counting]

it came on last night as i nipped out to see my sister, just after i went around a tight mini roundabout, and now is still on this morning.

car starts and drives fine, but what is likely to be the cause, in the octy handbook it states...

"If the warning light does not go out after starting the engine or comes on or flashes when driving, that indicates a fault in the engine electronics system or in systems which influence exhaust emissions"

whats likely to be the cause and should i stop driving the octy with immediate affect or not to worry too much but get it booked in to be put on vag-com etc

cheers
lee

[Goochie]

Mine came on when I had a split vacuum hose.

[VRStu]

Reading the codes either with VAG-COM or at the dealers with VAS should reveal the cause and is more reliable than trying to guess Lee.

[Wayne Kerr]

Mine comes on all the time, fault code reveals a shagged cat but I know it 's not so. Maybe your running a bit rich (I know I am), VAG-COM or Dealer will determine the cause.

[150HP&counting]

cheers guys, will see if JBS will take a look.

lee

[150HP&counting]

Well..... visited JBS on saturday just gone...verdict...

Check fault codes - Fault found, Pressure drop between throttle body and turbo.

They:

Checked all boost and vacuum hoses... then cleaned and re-aligned throttle body and stripped and cleaned diverter valve
Was there about 3 hours in total - apparently the above were pretty well gunked up(w/e that means)
they also turned the map down slightly as to prolong the life of the turbo, being that my car now has 103000 miles on clock - will the above led jbs to think the turbo is on its way, or just general good practice with it having 103000 miles???

I aint got a clue when it comes to stuff like this am afraid
One thing i can say is that the car pulss so much better lower down the rev range than it did previous to saturday which is good.

Anyway let me know your thoughts please
lee

[VRStu]

Why not ask JBS the question if they advised the changes they must have good reason for it.

Jusding by your list of planned mods, having the turbo turned down isn't going to be what you want, so if it is on it's way out then perhaps that might have to jump to the top of the list.

[EddyH]

They may have just reduced the boost spike, as advised though the best people to ask are JBS as they are the ones that did it.

[GAFF]

Originally Posted by 150HP&counting

Check fault codes - Fault found, Pressure drop between throttle body and turbo.

The dreaded 17705..thats popped up a few times on here.

[Wayne Kerr]

Yup, that's just popped up on mine again!!!! along with 10 other fault codes ,,,,,,,,,,,,,,,,,, PLUS they're all intermittent.
The other 10 are all "Short to Ground", How the hell do I sort that lot out.
I smell a huge fee coming my way from the dealership.

[bearthebruce]

Originally Posted by Wayne Kerr

Yup, that's just popped up on mine again!!!! along with 10 other fault codes ,,,,,,,,,,,,,,,,,, PLUS they're all intermittent.
The other 10 are all "Short to Ground", How the hell do I sort that lot out.
I smell a huge fee coming my way from the dealership.

Wayne, I'd look for a common fuse, common ground or a relay going to the effected area. But without more detail, it would all be just a guess.

-Bruce-
Ross-Tech, LLC

[Wayne Kerr]

Originally Posted by bearthebruce

Wayne, I'd look for a common fuse, common ground or a relay going to the effected area. But without more detail, it would all be just a guess.

-Bruce-
Ross-Tech, LLC

Bruce mate, the codes are as follows.

Faults Found: 17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!) P1297 - 35-10 - - - Intermittent 17633 - Fuel Injector for Cylinder 1 (N30): Short to Ground P1225 - 35-10 - - - Intermittent 17635 - Fuel Injector for Cylinder 3 (N32): Short to Ground P1227 - 35-10 - - - Intermittent 17636 - Fuel Injector for Cylinder 4 (N33): Short to Ground P1228 - 35-10 - - - Intermittent 17634 - Fuel Injector for Cylinder 2 (N31): Short to Ground P1226 - 35-10 - - - Intermittent 17833 - EVAP Purge Valve (N80): Short to Ground P1425 - 35-10 - - - Intermittent 17955 - Boost Pressure Regulation Valve (N75): Short to Ground P1547 - 35-10 - - - Intermittent 17525 - Oxygen (Lambda) Sensor Heating Circuit: B1 S2: Short to Ground P1117 - 35-10 - - - Intermittent 17843 - Secondary Air Pump Relay (J299): Short to Ground P1435 - 35-10 - - - Intermittent 17938 - Camshshaft Timing Adjustment: Short to Ground P1530 - 35-10 - - - Intermittent 17829 - Secondary Air Injection Solenoid Valve (N112): Short to Ground P1421 - 35-10 - - - Intermittent Readiness: 0000 0001

How's that for a kin-el

[bearthebruce]

Wayne,

I don't have access to wiring diagrams for your car. Outside of the pressure drop, I still think you are looking at a common connection problem to all these sensors. I would guess that there is a +Bat connection to all of them somewhere that is dropping out. That is why the intermittent nature of them.

But, could it be a module? Sure. Still, given the price of a module, I'd first eliminate the wiring possibility by going through the wiring diagram and looking for a common thread. But then I am an EE and that's the way my head works.

Hopefully someone who knows more than me will answer and give you a better heads up.

-Bruce-
Ross-Tech, LLC

[fordfan]

I am totally guessing here, check the power supply relay to the ECU, it is situated under the bonnet under a plastic cover with another relay, to the rear right of the engine bay as you look at it.

[Wayne Kerr]

Originally Posted by bearthebruce

Wayne,

I don't have access to wiring diagrams for your car. I would guess that there is a +Bat connection to all of them somewhere that is dropping out. That is why the intermittent nature of them.

But, could it be a module? Sure. Still, given the price of a module, I'd first eliminate the wiring possibility by going through the wiring diagram and looking for a common thread. But then I am an EE and that's the way my head works.

-Bruce-
Ross-Tech, LLC

Bruce,

I don't have a wiring diagram either (wish I had). You say your an "EE", what's that, view my public profile, we may be talking the same language.

[Wayne Kerr]

Originally Posted by fordfan

I am totally guessing here, check the power supply relay to the ECU, it is situated under the bonnet under a plastic cover with another relay, to the rear right of the engine bay as you look at it.

The way I see it is, if there is a interuption in the supply to the ECU, all systems would show a fault.

[bearthebruce]

Originally Posted by Wayne Kerr

Bruce,

You say your an "EE", what's that, view my public profile, we may be talking the same language.

EE = Electronics/Electrical Engineer

I really think you need to get a repair manual. I understand that they only have them in German for you car but the wiring diagrams should still be helpful. So, give that a try. See if someone might have copy and be good enough to share with you.

-Bruce-
Ross-Tech, LLC