Had a issue with starting a few times when engine has been hot (may or maynot be relevant) then after 10 minutes of waiting since it didnt start it will then start???

Eventually found el cheapo cable so managed a scan and this is what I found

VAG-COM Version: Release 409.1-US

Control Module Part Number: 06A 906 032 HN

Component and/or Version: 1.8L R4/5VT G 0001

Software Coding: 11500

Work Shop Code: WSC 31480

Additional Info: YUP CHASSIS NUMBER WAS HERE

12 Faults Found:

17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)

P1297 - 35-10 - - - Intermittent

17633 - Shareware Version. To Decode all DTCs

P1225 - 35-10 - Please Register/Activate – Intermittent??????

17635 - Shareware Version. To Decode all DTCs

P1227 - 35-10 - Please Register/Activate – Intermittent??????

17636 - Fuel Injector for Cylinder 4 (N33): Short to Ground

P1228 - 35-10 - - - Intermittent

17634 - Shareware Version. To Decode all DTCs

P1226 - 35-10 - Please Register/Activate – Intermittent??????

17833 - Shareware Version. To Decode all DTCs

P1425 - 35-10 - Please Register/Activate – Intermittent??????

17955 - Boost Pressure Regulation Valve (N75): Short to Ground

P1547 - 35-10 - - - Intermittent

17525 - Shareware Version. To Decode all DTCs

P1117 - 35-10 - Please Register/Activate – Intermittent??????

17843/P1435/005173 - Secondary Air Pump Relay (J299): Short to Ground

17938 - Camshshaft Timing Adjustment: Short to Ground

P1530 - 35-10 - - - Intermittent

17829/P1421/005153 - Secondary Air Injection Solenoid Valve (N112): Short to Ground

17697 - Shareware Version. To Decode all DTCs

P1289 - 35-10 - Please Register/Activate – Intermittent??????

Have checked on the Ross site and a few of them dont seem to pull anything up??????

Now I think im disregarding the secondry air ones as I had issues with the relay a while back which a replacement relay sorted but I never cleared the fault

Also disregarding 17705 check DV as I did have a atmospheric DV but now got a recirculating one now (not sure if I cleared the fault code LOL )

If and when car acts up again I will scan it and see what it comes up with as I have cleared all codes, but in the mean time what do you think could be happening??

Thanks in advance folks

Edited 26 June, 201016 yr by Bodie

Temp sensor sounds like it could be borked if your having hot start issues

yep, I'm with fatty - presumably when you say "won't start" you mean it cranks over but won't fire?

That is classic faulty coolant sensor behaviour, starts fine when cold but can be a bitch when it's hot. You will probably find that it will start eventually with a good puff off black smoke due to overfuelling, then once running will be fine.

Usually it won't set a fault either, because the value that the ECU reads is in range but just miles away from where it should be for the temperature it's at. Neither will the temperature gauge read incorrectly, as there are two discreet sensor elements in the one housing, one for ECU and one for the guage.

If you have the early black coloured coolant temp sensor then it's worth changing anyway for the later green one for the price.

thanks folks now any ideas where I will find this sensor

thanks

anyone got on location of sensor? and a part number?

Cheers

OK found it on the car but its a green one so presuming its the updated/upgraded one, is it likely to be this at fault still?

OK found it on the car but its a green one so presuming its the updated/upgraded one, is it likely to be this at fault still?

Yep

well ordered sensor today with delievery for tomorrow.

Only thing is now car started fine this morning drove it parked up at 10.00 went back to it at 13.30 wouldnt start tried it again turned over but wouldnt fire so took Fabia instead, got back at 17.30 tried it again turned over but wouldnt fire walked to the pub for dinner instead. Tried again at 20.00hours and it started first turn of the key.

Question is would the coolant temp sensor still be at fault?

Only difference I can see is it was in direct sunlight and sitting full on in it at 13.30 and 17.30 and it was bloomin hot but at 20.00 it was in the shade and alot cooler??????

As Rich says it all about temps So technically if the engine is hot then yes. Mine has staying warm for ages these last few days and if the sunlight is on the bonnet I guess that would keep it toasty all day.

Maybe that but don't hold me to it lol

Have you checked if the codes have come back again?

Theres a lot of electrical ones there, which could have possibly been to do with the relay you said you changed in which case they should go away and not come back. However, if they've come back then it sounds like there's still an electrical problem somewhere. I would have said if it's not even cranking then you need to check the earthing strap between the battery and the chassis, and the cable between the battery and starter motor. Disconnect them and clean off any corrosion from where they are connected.

Edited 30 June, 201016 yr by chicken_eyebrow

ooppss went n did the scan earlier hit what I though was copy codes (difficult to see screen with sun shining on it) and sorta maybe hit clear codes . On a more positive note fitted new sensor lets see ehat happens

car was at it again today only thing that I have found each time its given me grief is when the outside tempreture is hot & car is in direct sunlight to day started at 6.30 for work no worrys on break at 16.00hrs engine is cold and it cranks but no start same again at 16.15hrs tried again at 18.00hrs (it had clouded over and cooled down outside a fair bit and started first turn of the key.

17633 - Fuel Injector for Cylinder 1 (N30): Short to Ground

P1225 - 35-10 - - - Intermittent

17635 - Shareware Version. To Decode all DTCs

P1227 - 35-10 - Please Register/Activate - Intermittent

17636 - Shareware Version. To Decode all DTCs

P1228 - 35-10 - Please Register/Activate - Intermittent

17634 - Fuel Injector for Cylinder 2 (N31): Short to Ground

P1226 - 35-10 - - - Intermittent

17833 - Shareware Version. To Decode all DTCs

P1425 - 35-10 - Please Register/Activate - Intermittent

17955 - Shareware Version. To Decode all DTCs

P1547 - 35-10 - Please Register/Activate - Intermittent

17525 - Oxygen (Lambda) Sensor Heating Circuit: B1 S2: Short to Ground

P1117 - 35-10 - - - Intermittent

17843 - Shareware Version. To Decode all DTCs

P1435 - 35-10 - Please Register/Activate - Intermittent

17938 - Shareware Version. To Decode all DTCs

P1530 - 35-10 - Please Register/Activate - Intermittent

17829 - Secondary Air Injection Solenoid Valve (N112): Short to Ground

P1421 - 35-10 - - - Intermittent

17697 - Shareware Version. To Decode all DTCs

P1289 - 35-10 - Please Register/Activate - Intermittent

well this is what I got today, anyone any ideas what some of these codes are cause the ross tech site dont recognise them

I still think you've got an electrical problem somewhere... there are 4 different circuits shorting there. The heat could be causing something to expand and touch a wire causing these shorting issues.

Edited 1 July, 201016 yr by chicken_eyebrow