Engine Warning light

[Mr Blue]

it had an MOT other week.  the Temeperature gauge reasy 90deg, but decides to go to zero degrees when it pleases...

That is a nackerd sensor. IIRC its £25 odd quid from vw. They have 4 pins. one for the dash and one for the ECU.

remember to buy a new 'O' ring while your there

You dont seem daft but dont change the sensor while the engine temp is hot  :embarassed:

 

[AndyMitton]

gonna get one today. thanks mate!

[teshiee]

hey im having this same problem with my mk4 at the moment!

Just had it serviced.... however looking and listening to the engine ... the car seems as normal as can be!

Can i still drive it?

[Lennon]

Mine came on about 6 months ago so I took my PC down into the car (don't have a laptop!)

Sorry but that cracked me up !

I can just picture it now

Funny thing was I decided to do this at about 9pm so it was just starting to get dark too ! I realised my wireless internet worked outside too and I was fumbling about talking to someone trying to help me getting vagcom to work.  I always get sudden urges to do things at strange times.

I had the warning light on loads when I first bought the car.  One time it was just a split air intake hose, another time some hose had come off the secondary air system, the other I ended up needing a new cat.  The last time was my previous problem.  Had quite a few issues when I first bought it but it's been fine for months now.  The 'cash' light can mean almost anything but what is for sure is it's going to cost you money!

[Cheeky Monkey]

Do yourself a favor and get a diagnostic reader off ebay £50 (Genden, VAG-COM) and I tell ya, it saved me s*** loads of money in diagnostic charges where VW charge £91 a hour and I was charged 3 hours. Don't say I didn't warn ya 

[m00ni71]

Hi'as i said before i turned off my engine management light!but it came back on 2 days later so i did a full diagnostic check and it came back again saying 'fuel bank to rich on cylinder 1 & a code.looked code up on pc & said check battery terminals'check fuel lines & fuel filter'i did a service on the car & changed the fuel filter.5 days have passed & engine management light has NOT come back to haunt me!!!!!touch wood this has cured the problem

[AlanD]

You do realise by saying that it will come on tomorrow morning

[m00ni71]

Your not wrong dave its back' came back on today!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!ive only had the car for 2 weeks do u know what i need to do?if its a sensor were is it & also my temp gauge has stopped working now,Its a mk4 on a W'reg 20lt 115bhp. Thought it would be reliable as its only done 52000 miles
Thanks for any help!!

[m00ni71]

sorry mate!! called u dave meant ALAN D

[AlanD]

I was thinking, whos dave ?

Well from reading your last post it doesnt sound like you actually did anything other than reset it which isnt going to do you any good, I know this sounds really simple, but if this light is coming on something has gone and needs correcting, resetting it wont fix it as it will just come back.

You said something about your fuel being too rich? Can you get a hold of the exact error code that came out? fuel running rich could be a number of things, of which the most common I would say is your lamanda (O2) sensor. I have no idea where this is or how to get to it, but without the full error code we can only speculate.