tommyn1991 Posted January 25, 2015 Share Posted January 25, 2015 My engine management light comes on if I cruise at a steady speed in top gear for a prelonged period of time, probably around the 60mph mark, if I turn it off and on it goes away again, if I'm just going around town it's fine, if I thrash around its fine. just when cruising, anybody heard of or had anything like this before? Quote Link to post Share on other sites
jayc-glanza17 Posted January 25, 2015 Share Posted January 25, 2015 (edited) Yes mate.I had speed signal failure only happens If ecu doesn't read signal above certain rpms for a period of time.Also do a diagnostic check and see what fault code flashes up Edited January 25, 2015 by jayc-glanza17 Quote Link to post Share on other sites
tommyn1991 Posted January 25, 2015 Author Share Posted January 25, 2015 Sorry for being ignorant but what do you mean when you say speed signal failure? Quote Link to post Share on other sites
jayc-glanza17 Posted January 25, 2015 Share Posted January 25, 2015 Signal ecu reads for speed.Ie the speedo is mechanical.The ecu takes an electric reading for its own needs Quote Link to post Share on other sites
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