DGraham Posted September 24, 2006 Report Share Posted September 24, 2006 I have a 04 Lupo Sport, when i picked the car up i filled it with Shell Optimax as i have a Octavia before that and it run alot better with it. After about 4 days the engine checklight come on and would not go off i have a fault code reader and the code was 17598 (Linear 02 Sensor / Reference Voltage Incorrect Signal), i kept knocking the light off but it was about 10 to 30 mins and it was back on. I took the car back to VW as its still under warrenty they said they had knocked it off but it would come back on as whoever had changed the backbox had chopped the cat out. This was aload off rubbish only the back box had been changed, after putting up with the light for a few weeks i thought why wast money on expensive fuel when it wasnt right and filled it up with normal fuel. After a couple of days it went off on its own and has never been back on since i have used normal fuel, put optimax back in and on comes the light. Has anyone had the same problem?? I have heard ppl say on here the sport runs better on Optimax.Also i think i have a dodgey fuel gauge it sometimes doesnt go out when the gauge is over quater any1 with the same??Thanks Quote Link to comment Share on other sites More sharing options...
ryan lupo sport Posted September 24, 2006 Report Share Posted September 24, 2006 when i had my lupo sport i run it on optimax for 8months and all was great. can see the optimax beening the problem Quote Link to comment Share on other sites More sharing options...
MurgaGTi Posted September 25, 2006 Report Share Posted September 25, 2006 My brother has the problem with the engine management light on his Sport. It's been in and out of the garage since he got it. Never thought about the fuel though style="vertical-align:middle" emoid=":o" border="0" alt="ohmy.gif" />S suppose we could try normal petrol see what that does! Quote Link to comment Share on other sites More sharing options...
Tigz™ Posted September 25, 2006 Report Share Posted September 25, 2006 Sounds silly, but is it defenatly a Sport ECU fitted? Quote Link to comment Share on other sites More sharing options...
Frankie Posted September 26, 2006 Report Share Posted September 26, 2006 Shouldnt be a problem running on optimax, apparently the sport was mapped by VW to run on 98 ron fuel ( ie optimax) to achieve the full 100bhp figure. Tis a mystery, could it be a sensor issue?Your query about the fuel guage, this is normal. if you run the tank quite far down then the light will stay on once you fill up again, takes a while to go out. i have had a full tank and the light on before. Quote Link to comment Share on other sites More sharing options...
Ty Posted September 26, 2006 Report Share Posted September 26, 2006 Mine used to come on constantly they tried everything under the sun to fix it eventually they put in a whole new ECU had to wait 2 weeks for it to be shipped! Quote Link to comment Share on other sites More sharing options...
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