Check Engine light when wheather is cold

[CBoisclair]

I have a strange problem, as soon as the temperature goes below 0 celcius (32F) the check engine light turn on and may stay on a long. When the weather goes warmer the light goes off.



I tried to have the code read by the dealer but whenever I went the light was off.



Any of you ever had this problem ? What could be the problem ?



Thanks

 

[Todd T]

we need to know what you are driving!!

 

[Motorhead]

Eng light

If you have a newer 24 valve, you can get the code # by cycling the key switch on and off three times (quickly). Even with the light off, the ECM will store the code that is turning the light on.

 

[CBoisclair]

Todd T, Moterhead



I have a 1999, 24v ISB with Automatic.



I cycled on-off 3 times quickly but did not get any light flashing. Which light should be flashing ?



Thanks

 

[Bill H]

If it has set a code, it will be displayed in the odometer. If none are set it will say P-done.

 

[CBoisclair]

I tried again (many times) to get a code, but no luck. Nothing is displayed on my odometer. Never got the P done message (as per Bill H' post).



Last year I went to the dealer but the check light was off, but still they could not find any code stored in the ECM.



Could it be that this check light be a false one ?