exhaust light flickering sometimes solid

[bigstu]

Hi not a 4wd I know but I just brought a 1986 corolla 4age fxgt for a run about, the exhaust/cat light randomly flickers sometimes stays on what is this for? and what does it mean? Ive tried googling it but seem to end up with modern diesel exhaust system issues.
thanks Stu

[Cameron]

Catylic converter overheat light. If it stil has the cat itl be buggered probably. The sender may hav issues to. Just get it cut out. Need to do this on my paj for same reason!

[slide]

If engine runs poorly this can cause exhaust temperature to rise, and then bring on light. But quite likely to be a fault with light circuit

[bigstu]

seems to go good so maybe just the cat needs removed, thanks for the answers
Thanks Stu