hi i now i'm new on here but i just want to vent my anger

i own a 04 octavia vrs which i brought from my local skoda dealer in may.

the car has been great couldn't praise skoda up enough but on 17th jan it when in dealer with engine management light on said it was oxygen sensor so had that replaced .car was fine till last monday light was back on again so again went back to dealer who said it was showing up as being oxygen sensor again so had it replaced for second time checked all wiring and said could not find anything else wrong that could be causing it.this morning starts car and low and behold the bloody light is on yet again.phoned them and gotta take the car back in again.

does anyone on here have similar problem as getting on my nerves and warranty will run out in may so want something sorted.

thanks for any help

Next time it goes in ask if you can have a list of the fault codes and post them on here, without those we haven't got much to go on.

right just got it back today after dealer having it for over a week trying to find out why engine management keeps saying same fault with oxygen sensor.said they could not find anything wrong changed sensor again checked wiring and said they couldnt get light to come back on.so picked it up drove home left car for a hour,started it to go to work and bloody light back on again dealer cannot have it back in for 2wks and said warranty wont cover me if its wiring fault

has someone else had same problem so i can tell skoda dealer cause they claiming they car find fault

and also someone told me that if the same fault hapens more than three times and they dont fix it i'm legally entitled to my money back for the car is this true

hello mate i had a similar problem, was told it was a Coolant Temp Sensor.

A mate of mine had exactly the same problem. mines a 53plate and his is an 04

p.s the light probably keeps going out cos they reset it IIRC!?!?

I can't remember the details, but a "persistent fault which can not be eliminated" can be grounds for rejecting a vehicle yes. If you're contemplating going down that route, I would advise talking to your local Trading Standards dept, and possibly a solicitor, before trying to reject the car at the dealership.

no light was still on when it was diagnosed then couple of days later light would just go off on its own

aint waiting for another 2wks going to take it back in the morning so will get fault code off them an post it up on here

ask about the coolant temp sensor mate, like i said i know mine and a mates did the same thing

What we're forgetting or don't realise is that it doesn't necessarily mean the oxygen sensor is faulty just because the fault code relates to it. The sensor might be working perfectly normally, and telling the ECM what is happening. There might be some other engine fault which would be the reason why the sensor has gone outside the ECMs programmed parameters.

The oxygen sensor contains a substance called zirconia which is sensitive to oxygen, and produces a small voltage when it detects it. Many O2 sensors are heated, and these are recognisable by having four wires, whilst those situated close to or in the exhaust manifold only have one wire and therefore do not need to be heated.

A four wire sensor will have a heater supply from the ECM, a sensor supply from the ECM, a sensor return to the ECM and an earth. Use a voltmeter between the ECM return and earth and you should read 0.1V-1V continually going up and down once the engine has reached normal operating temperature. It's called an 'Open/Closed Loop' system, as the ECM is continually adjusting rich and lean in order to obtain 'Lambda one', a chemically correct mixture. As the voltage rises the ECM is enriching, as it falls the ECM is leaning off. Your garage should be concentrating their efforts elsewhere, as it would seem now that the sensor itself is not the problem.

Unfortunately you're in the hands of many modern technicians who just do not understand how the systems work. They just go by what the computer says, or the 'Goon Machine' as a garage owner I know calls it......

Edited 11 March, 200917 yr by Railroad

:iagree:, which is why I draw a destinction between "mechanics", who have diagnostics training and use the pooter as a diagnostics aid, and "vehicle technicians" who just read a manual and swap bits based on what the man page says.

:iagree:, which is why I draw a destinction between "mechanics", who have diagnostics training and use the pooter as a diagnostics aid, and "vehicle technicians" who just read a manual and swap bits based on what the man page says.

I have said similar before Ken. Give any idiot a code reader and they can call themselves a technician. Far to many of these about, especially at main dealers these days unfortunately. It is a bit of a con really that they can charge up to £40 to "diagnose" a vehicle with out so much as starting the engine

Ian

I have said similar before Ken. Give any idiot a code reader and they can call themselves a technician. Far to many of these about, especially at main dealers these days unfortunately. It is a bit of a con really that they can charge up to £40 to "diagnose" a vehicle with out so much as starting the engine

Ian

I used to work as a roadside patrol for both major UK motoring organisations, one immediately before the other. When I was with the first one (the yellow one) I was involved with conducting telephone interviews with prospective patrol candidates. The interview always came as a surprise to the candidate as they were not warned beforehand, and consisted of a series of technical questions so we could get an idea of the kind of knowledge they had. Without exaggeration I can honestly say that most main dealer applicants never got beyond this stage of the recruitment process, and some were just plain useless......

just a bit of an update,took car back last wednesday told them i wanted to see manager because i wanted my money back place was full of customers and they produced a set of keys for a loan car so got a fabia estate:rofl: .have not heard anything since i took it in so went in today said someone should of phoned me yesterday because they suspect it needs a new ecu but wont fork out for one until they have had a reply from skoda confirming it.