southern Report post Posted October 14, 2017 Recently I added a catless test pipe (with bung) and using the original exhaust muffler, after 10miles of driving, engine check light was on, it is indicated as "start/stop failure. I have it reset at local agent but it came back again. I read on other chats that a o2 spacer might help. I'm sure someone in this chat might have solves this issue, pls help ! I love the exhaust note with lots of crackers/popping now but I hate the see the check lights. Any solution for this ? Quote Share this post Link to post Share on other sites More sharing options...
CK1 Report post Posted October 14, 2017 my CEL is permanently on on my aventador sv , service center said its normal.. its always caused by start/stop failure, if i remember to disable it as soon as i get in then the CEL doesn't come on. most times i don't Quote Share this post Link to post Share on other sites More sharing options...
SAMLAMBO Report post Posted October 14, 2017 Recently I added a catless test pipe (with bung) and using the original exhaust muffler, after 10miles of driving, engine check light was on, it is indicated as "start/stop failure. I have it reset at local agent but it came back again. I read on other chats that a o2 spacer might help. I'm sure someone in this chat might have solves this issue, pls help ! I love the exhaust note with lots of crackers/popping now but I hate the see the check lights. Any solution for this ? Hello bro , congrats on your Aventador Quote Share this post Link to post Share on other sites More sharing options...
Fortis Report post Posted October 14, 2017 my CEL is permanently on on my aventador sv , service center said its normal.. its always caused by start/stop failure, if i remember to disable it as soon as i get in then the CEL doesn't come on. most times i don't Which CEL is permanently on? That certainly isn't normal. Are you running an aftermarket exhaust system and that's why is it on? I am slightly confused by your post. Quote Share this post Link to post Share on other sites More sharing options...
SAMLAMBO Report post Posted October 14, 2017 Which CEL is permanently on? That certainly isn't normal. Are you running an aftermarket exhaust system and that's why is it on? I am slightly confused by your post. He’s a good Friend of mine. He removed his stock Cats and put on powercraft testpipes Quote Share this post Link to post Share on other sites More sharing options...
Fortis Report post Posted October 14, 2017 He’s a good Friend of mine. He removed his stock Cats and put on powercraft testpipes I see, so that’s what’s causing it. Quote Share this post Link to post Share on other sites More sharing options...
topjay Report post Posted October 14, 2017 Both capristo and novitec sell plug in o2 simulators for the ecu to stop this. Would really annoy me to keep getting warning lights, one day it might be something that it actually needs to warn you about that you ignore. Quote Share this post Link to post Share on other sites More sharing options...
southern Report post Posted October 15, 2017 my CEL is permanently on on my aventador sv , service center said its normal.. its always caused by start/stop failure, if i remember to disable it as soon as i get in then the CEL doesn't come on. most times i don't Are you on aftermarket exhaust ? I tried disable the start/stop but it still throw CEL, the warning is “ start/stop failure ” I asked the local agent, why does start/stop got to do with aftermarket exhaust, their reply is ,when there is a o2 problem, start/stop will fail Quote Share this post Link to post Share on other sites More sharing options...
southern Report post Posted October 15, 2017 Both capristo and novitec sell plug in o2 simulators for the ecu to stop this. Would really annoy me to keep getting warning lights, one day it might be something that it actually needs to warn you about that you ignore. Agree with that, CEL is an eyesore and it's very annoying. NoVitec products will not work together with different brands , eg. My friend had a ipe exhaust with test pipes that throws CEL, He install the novitec CEL Cancelor, it wont work. Workshop over here also mention that it will only work with noVitec exhaust Therefore I'm thinking to add a o2 spacer, does anyone have it installed on their ride ? I'm asking because adding o2 spacer is alot of work, I may end up paying for the product and labour for something that won't work. Quote Share this post Link to post Share on other sites More sharing options...
southern Report post Posted October 15, 2017 my CEL is permanently on on my aventador sv , service center said its normal.. its always caused by start/stop failure, if i remember to disable it as soon as i get in then the CEL doesn't come on. most times i don't I tried, it doesn't work. Quote Share this post Link to post Share on other sites More sharing options...
shardul Report post Posted October 17, 2017 Agree with that, CEL is an eyesore and it's very annoying. NoVitec products will not work together with different brands , eg. My friend had a ipe exhaust with test pipes that throws CEL, He install the novitec CEL Cancelor, it wont work. Workshop over here also mention that it will only work with noVitec exhaust Therefore I'm thinking to add a o2 spacer, does anyone have it installed on their ride ? I'm asking because adding o2 spacer is alot of work, I may end up paying for the product and labour for something that won't work. A O2 spacers / non fouler has a 50/50 chance of working. The reason your CEL is triggered is because due to the absence of cats the secondary O2 sensors is picking up a rich AFR reading. They also make O2 spacers that have cat material in them, these work better than the spacers. Quote Share this post Link to post Share on other sites More sharing options...
southern Report post Posted October 17, 2017 A O2 spacers / non fouler has a 50/50 chance of working. The reason your CEL is triggered is because due to the absence of cats the secondary O2 sensors is picking up a rich AFR reading. They also make O2 spacers that have cat material in them, these work better than the spacers. Fabspeed have the o2 spacer with cats, wonder if it works ? Quote Share this post Link to post Share on other sites More sharing options...
Toulbox01 Report post Posted October 20, 2017 Recently I added a catless test pipe (with bung) and using the original exhaust muffler I love the exhaust note with lots of crackers/popping now but I hate the see the check lights. Any solution for this ? Hi, There's a guy here in Australia who's installed an Akrapovic catless down pipe, with no CEL. I'm told Akrapovic pipes are best to avoid any CEL errors. Also, I'm in two minds about what to do with my exhaust. I'm looking at replacing the muffler or what you did. Why did you go the catless pipe? Does it make that much a difference to stock system? and do you know how your set up compares to a muffler only system? Quote Share this post Link to post Share on other sites More sharing options...
southern Report post Posted October 21, 2017 It is catless and was remove from my friends car and installed on my car. His is a 2011 car without CEL, mine is a 2013 using the same test pipe but with CEL. I also wonder why. Noticeable diff is when u downshift or release yr gas pedal, u will have lots of popping sound from the exhaust. (Sounds like fire crackers). Original do have popping sound as well but soft. I hoping for fellow forummer to gives me some advice too on how to settle the CEL issues. I may just drive it with CEL on because I love the sound Quote Share this post Link to post Share on other sites More sharing options...
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