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Hi Guys got my car dynoed then i noticed engine light was coming on around 4,500rpm rang dyno guy and he said it was afm maxing out and nothing to worry about. Now i checked and was only getting 35 knock max so obviously its not pinging, then last night i noticed that the engine light wasnt coming on anymore and that instead the exhaust temperature light ( the one with the picture of a cat with waves going over it) was coming on instead?? I was running some extra octane boost.

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Just means the sensor where the cat is is very very hot. Usually happens after you give the car a good caining in the hills, at least I know mine did.

Mine does the same thing but only after a LOT of punishment in 1st/2nd gear sort of areas if that helps?

Ok thanks mate, weird thing is it came on as soon as i took my 4wd fuse out and put my car in rwd then i gave her some and it started to flash, i put the fuse back in and she still comes on, only thing i can think is that some how the sensor got knocked off the bottom of the car where i had tucked it in.

I adding the octane boost as i filled up with crap caltex fuel and my car started to hit 70 knock so i thought it make a diffence which it did, never using that fuel again!

ok you need to be clear on which one you are talking about

engine check light

or

exhaust temp light

your topic says exhaust temp and the content says engine check light

engine check light - orange engine icon

ehaust temp light - red box with squiggly lines

engine check light

used by powerfc to indicate;

airflow meter maxing out

injectors maxing out

knock exceeded 60

the powerfc faq tells you how to diagnose and check for all 3 items and how to disable/enable them

exhaust temp light;

used by powerfc to indicate;

exhaust cat is too hot

either disable the sensor or get the cat checked (could be blocked)

It is the exhaust temp one im talking about, i have a de cat and the sensor is not plugged in and it wasnt flashing before.

There is also a red light under the cat over heating light what is that light for thats the one which was coming on before the exhaust temp one did?

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