ThomasP

Alasdair1/JohnMack Great replies Laters Tom

Breezy Pete False alarm.............this is a good one. I've just rechecked the meaning of the warning lights..........It's the COOLANT level light thats on NOT the oil level sensor........what a stupid boy!!! I've just checked and the coolant level was slightly low......hence after topping it up, the COOLANT level warning light doesn't comes on anymore!! Loooool, who would believe it!!! I think I'll put this down to 'having a senior moment'. It can't be my fault because the wife tells me that men never make mistakes........hahaha So, once again thanks Breezy Pete and Alasdair for your help All the best everyone Tom

Breezy Pete Thanks again, you have helped me before...... Where do I find the oil pressure sensor on a 1.9tdi pd? (BKC build fyi) Tom

Alasdair The warning light is red but from what you're saying it looks like the sensor has gone faulty. The engine is in really good condition so i don't think it's oil pressure but at 300K it could be anything. The part is deffo the original I've had the car since 2008 Thx v much for your post Tom

Hi there everyone One of my rare posts as this car seems to be going on forever..... I have a 2005 Octavia 1.9tdi pd combi (1Z5) The oil level sensor seems to have developed a fault in that when I start the car with the engine cold it lights the warning lamp and beeps at me. (I have checked the oil level and it is fine). However, when the engine is warmed up the fault disappears. From what I can gather these sensors seem to be a reasonbly common failure item. The car has only done 300,000 miles and the sensor will definitely be the original item. My presumption is that the sensor has gone faulty and/or possible crusties at the connector. The normal working temperature seems to be the cure for the error. Does anyone know if this is deffo the sensor. ie. Is this how they usually fail? I don't suppose it might be cured by taking it out and cleaning it or spraying it with carb cleaner would help. The replacement item doesn't seem too expensive (except from the main dealer, of course) so if the wiring is good then I'll just swap the sensor for a new one Any comments from any one gratefully accepted Thanks all Tom

Samoht26 Hi there I am not the world expert in any way regarding this problem I had with my car. Breezy Pete was a big help to me and after much thinking and theorising on my problem I came to the conclusion that it was indeed the wiring. When I connected up my very, very cheap obd2 reader it showed the temperature at -39 degrees which was obviously not correct. Both the fans would start about 10 seconds after turning the ignition on and the tick over was slightly raised and the car never felt as though it was running "easy". Also, the temp gauge was very unpredictable in that it mostly didn't work at all but would occasionally make it way towards normal but never get there and then eventually fail again. The fans remained on all the time I was using the car. However the car was obviously running at the correct temperature. If your G62 temp sensor is the two wire type the the circuit for it is simple. The two wires come straight from (via the wiring loom) to the coolant sensor and the straight back again with no junctions or connections involved in the wiring. With the fantastic help of a local mechanic we actually made the repair together by cutting both of the wires near to the sensor, identifying the other end of the two wires at the ECU, cutting those near the plug and simply replacing the wiring. We never identified EXACTLY where the wiring fault was but the theory was that one or both of them had shorted to earth and/or to each other This instantly cured the problem and as I type this message the car has behaved perfectly ever since so for me this was a definite fix. I hope this helps you Good luck Regards Tom

Update - Now solved Firstly, thanks to all the people who offered advice/help. The problem has indeed turned out to be a wiring problem which was resolved by completely disconnecting the original wiring in the loom and replacing both cables direct from the sensor to the ECU as per wiring diagram. Once this was done the car immediately reverted to correct behaviour. The added, very pleasing wrinkle is that a parasitic drain that the car has suffered from for years now seems to have disappeared also. Hoorah!! So, thx again everyone......Until the next time Regards Tom

Everyone Thanks for all the replies Tom

Blue Wagon Thanks again.........this exactly what I think. The engine is 100% running at the correct temperature. I think the wiring is the issue and this is why I think I need an experienced person to look at it . As I say, when the awful weather improves I will have a look myself but of course I shouldn't think a proper auto electrician would "like me to help" bt disturbing everything. Once again, I thank you for helping. I'm trying to find a recommended loacal auto electrician but I just don't know anyone Thanks again Tom

BlueWagon Thanks very very much for the excellent response and suggestion. The engine is definitely running at the correct remperature, these were my thoughts at the beginning of this problem.... I need to get it looked at by a proper auto electrician who knows VWs, Skodas etc. Practically speaking, the car isn't worth that much any more, I don't have hundreds of pounds to chase a problem I might never solve. When this neverending freezing cold snap finally relents I might try and chase this broken wire business myself but I am not too confident with these things(everyone keeps telling me that a broken wire is most probable) and it definitely does fit the symptoms. Apparently, a favourite place for a broken wire is under the batterry where the loom runs close to the body... but who knows. Annoyingly, the other day the temp gauge burst into life again afetr a long period of only moving a couple of mm for the last few weeks but again, it did not go to read normal and dropped down to very nearly cold. At nearly 300,000 miles the problem could be anything but I don't think it's the ecu (just my feeling). If there is a knowledgeable auto electrician reading this please get in touch. I am in the North Hertforshire area... Thanks again blue wagon and anyone who has read this Tom

Pastiche...........nah! I did what you suggested but it's still the same. Thanks very much for the suggestion though Regards Tom

Pastiche, thx v v much for the reply. I'll give it a go and report back Thanks again Tom

Pete Many thanks for the response........ The connector looks fine and shiny. In fact, if I start the engine with the connector not fitted to the sensor both cooling fans run and if I then connect the connector to the sensor the fans will stop but the error is still reported and the next time the fans will start when i start the engine.......so it might indicate the wiring (or at least the connector) is good but I need a competent person to look at it, I think... but thx v m etc for your reply Tom

OK, here goes...... I have a 2005 1.9tdi PD 8 valve. BKC build, manual 5 speed gearbox. I bought this car in 2008 and now have completed 292,000 miles. So the engine management light came on reporting a G62 coolant temperature sensor problem. I have replaced both of the coolant temp sensors. There is one at the bottom of the radiator on the passenger side and one at the side of the cylinder head above the transmission. From what I can gather the sensor that relates to the G62 error is the one at the side of the head. I have replaced this now twice, the second time with an oem quality sensor just in case I had a faulty new sensor. The problem I have is that the G62 error will not go away and the EML comes on usually when I start the engine but not every time. The car is running absolutely fine at the proper temperature but the cooling fans come on when I start the engine and I think they remain on nearly all the time. The tick over is very slightly raised when cold but does eventually go down to normal. The temperature gauge hardly works at all. If I drive for a long journey the temp gauge might work slightly but never gets to normal and usually goes back to zero. Usually, after a reasonable journey when i park the cooling fans are both still on but not always. I did take it to a recommended person and he connected his whiz bang computer and the car just reports the G62 coolant error. It also reported that the temperature was -39 degrees so it appears that the ecu is not getting the info from the sensor. I do not have access to anything other than a very cheap chinesium code reader that I use to turn off the EML but it always inevitably comes back again, usually when I start up in the mornings but not always. All the time it tells me there is a coolant temp sensor error. The temperatur gauge on a day to day basis is not operating but, as i say it will suddenly work after a fashion and then either stay working or drop back down to zero but never reaches normal. (The thermostat is definitely working properly and is high quality). Both of the sensors are of the two wire type. My guess, and it is a shot in the dark is that there may be a short to ground, either permanent or not but I really just don't know what the problem is. It could be the ECU, I suppose (in which case the car will be sent to Skoda heaven) but everything else on the car is working very well considering the high mileage of the car. If anyone has any diagnosis or knows someone near to North Herftordshire who knows about these things I would be very grateful for all advice and contact names. I am a pensioner so cannot afford to spend hundreds of pounds chasing a problem such as this one with no guaranteed diagnosisor success..... If you are still reading then thanks and well done! I will watch out for all replies, so thanks everyone Tom