Attero Posted August 20, 2015 Share Posted August 20, 2015 On my NA, I'm getting this warning light which i'm sure signifies an overheating cat. I was under the assumption that my O2 sensors were on the way out because I'm have some performance issues and I'm often running a bit rich as well as having high fuel consumption. All those signs lead to a common problem - aged O2 sensors (although it could be anything I suppose)! The diagnostics manual says that there are codes for O2 sensors, but I don't have any stored codes. Does this warning light store codes? I get this warning light after giving the throttle a hard time for about 10 seconds and then it disappears. The car doesn't feel any different afterwards. Here are the symptons of my issues: - Bad fuel consumption - Running rich - Bit bouncy when easing off the throttle when driving in first/second gear - Taking foot completely off the accelerator in any gear or speed results in a slight jolt. - Can often be difficult to pull away quickly in first gear. Last time I had these issues it was a vacuum leak, I suppose I should also check for this. But I never got that warning light for that. Any thoughts? Quote Link to comment Share on other sites More sharing options...
Attero Posted August 20, 2015 Author Share Posted August 20, 2015 Forgot to post the pic. Quote Link to comment Share on other sites More sharing options...
Timlowthian Posted August 20, 2015 Share Posted August 20, 2015 I could be wrong but isnt that the Exhaust Temperature Warning light? If it is the sensor is in the cat so I would check they haven't collapsed or got blocked Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted August 20, 2015 Share Posted August 20, 2015 Yeah think that is the cat temp sensor, they may have died as above. I have a spare 1st and second cat here mate, also have the first decat too. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 21, 2015 Share Posted August 21, 2015 Disconnect the CAT temp sensor and see what happens. If the ecu thinks the cat is overheating it may well be mapped to do odd things. I doubt it *IS* actually overheating, but a retarded ignition or an engine fault dumping a LOT of excess fuel into it, or conversely, making it run very weak could overheat it, as would using leaded fuel. Quote Link to comment Share on other sites More sharing options...
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