Gravel 102 Report post Posted August 1, 2016 Hi guys I'm in the middle of a road trip and my Check Engine Light has come on and my rev limit has dropped to 4k ish. The car sounds fine, smells fine and drives fine apart from that. I am in the middle of a very beautiful nowhere and not sure what to do - I'm tempted to try disconnecting the battery to reset the ECU and see if it was a gremlin or a repeatable fault. Any advice would be much appreciated - for now I'm going to take solace in a pint and a dram. Quote Share this post Link to post Share on other sites
Bravo73 1,055 Report post Posted August 1, 2016 Have you got an OBD reader with you (or near anywhere with one, ie a garage)? My car went into limp mode a few months ago. The error code (P1302) related to a high cat temperature. Cleared the code, let the car cool down a bit and it hasn't come back since. Quote Share this post Link to post Share on other sites
CocoPops 827 Report post Posted August 1, 2016 Yep, you need a code reader. Where are you? Quote Currently Owned: 2018 Lotus Elise Sport 220 in Metallic Blue, Alcantara Pack, Forged Wheels, 2piece brakes, AirCon, Hard/Soft Tops, Red Calipers, Stereo, Interior Colour Pack, NVH Pack, Carpets, Mats. Previously Owned: 2016 Lotus Evora 400 'Hethel Edition' in Essex Blue, Red Leather, Red Calipers, Silver Forged Wheels Previously Owned: 2010 Lotus Evora NA in Solar Yellow, Sports Pack, Tech Pack, "Heritage Edition" Recaro Seats Follow my Lotus journey here: http://www.FaceBook.com/HandmadeInHethel Share this post Link to post Share on other sites
Gravel 102 Report post Posted August 1, 2016 Cheers guys - I own several OBD readers but they are back at home. I'm just north of Ullapool at the moment. Quote Share this post Link to post Share on other sites
Gravel 102 Report post Posted August 1, 2016 2 hours ago, Bravo73 said: Have you got an OBD reader with you (or near anywhere with one, ie a garage)? My car went into limp mode a few months ago. The error code (P1302) related to a high cat temperature. Cleared the code, let the car cool down a bit and it hasn't come back since. Interesting - I was doing a lot of slow speed hill climbs in 2nd and 3rd - I'm pretty sure the exhaust would have been.toasty! There were certainly lots of pops.and bangs of contracting metal when I pulled over for a quick stop. Quote Share this post Link to post Share on other sites
Bibs 8,954 4 Vehicles Report post Posted August 1, 2016 If you reset the ECU and it's a persistent error, the light will come back on. If you reset it and it's a temp error, problem solved. I can't see the harm in resetting it and seeing what happens but make sure you reset it after a period of inactivity, eg more than 15 mins after the last time the car was run, and don't get straight back in the car and spank it before the light has a chance to come back on, if that's what it wants to do. That said, if there any any garages close to you, one of them may be able to either lend you a scanner or come to you with it, for a small fee. 1 Quote 88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport Evora NA For forum issues, please contact the Moderators. Share this post Link to post Share on other sites
TBD 767 2 Vehicles Report post Posted August 2, 2016 You can always do 2 or three start-stop cycles, waiting a minute or two between sttarts. Many intermittent faults are erased automatically if they don't occur again. Quote If you have the choice between a Stairway to Heaven and a Highway to Hell don't forget the Nomex®! Captain, Lotus Airways. We fly lower! Share this post Link to post Share on other sites
Gravel 102 Report post Posted August 2, 2016 The CEL is still illuminated but I discovered by accident that limp mode is gone all by itself. Hooray! Quote Share this post Link to post Share on other sites
Bibs 8,954 4 Vehicles Report post Posted August 2, 2016 2 hours ago, TBD said: 2 or three start-stop cycles I believe the codes are retained for 5 key cycles. Quote 88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport Evora NA For forum issues, please contact the Moderators. Share this post Link to post Share on other sites
Gravel 102 Report post Posted August 2, 2016 Ta - it'll probably go away before I can scan it unless it happens again. Just bought some spanners and a socket set just in case! Quote Share this post Link to post Share on other sites
Gravel 102 Report post Posted August 2, 2016 Well as I discovered mid overtake, the limp is back but without the light. I have been trying to do more rolling around at low revs but I guess the poor girl can't do endless hour's of hill climbing without a lunchbreak! Quote Share this post Link to post Share on other sites
Gravel 102 Report post Posted August 22, 2016 Many thanks to everyone who replied earlier. Car made it safely home after 1700 miles driving in 8 days. I couldn't find my scanner so got another from Amazon - apparently it haa thrown a P0171 which I believe is bank 1 lean. Any ideas why it might do that? It's either too little fuel going in or too much (unmetered) air but I can't see how that would behave like it's heat related unless something is cracked somewhere. Quote Share this post Link to post Share on other sites
Hangar 111 249 Report post Posted August 22, 2016 Check for air leaks around the induction, particularly the hose joining airbox to throttle body. Dave 1 Quote Share this post Link to post Share on other sites
