2000 malibu engine light

[craaze1988]

my check engine light is always on i have no idea why but i changed the radiator overflow tank because it was leeking then the cap broke so i put a new cap on and yet that one broke so i went to the dealer and got a cap from them the light went off for the first time then about 5 mins later it came back on i dont know why the cap is doing its job its not broke any help would be appreciated

[Scott-Ohio]

i think autozone still reads check engine light codes for free with an obd-2 reader if you don't have one. that's where i'd start for the engine light.

the surge tank/cap may be unrelated to the check engine light even though light went out for 5 mins when replacing cap.

[bcopeland]

You really need to have those codes read before you can begin to diagnoze. Autozone still reads for free.

[bearcatdon]

I'd give up with replacing the caps. I've busted a few.....it's a bad design and the bottle ID may be a bit small. I now unscrew the cap and pry the broken piece out of the neck with a screwdriver. Just don't pry it up by the O-ring.