I noticed that after a week when I spayed the TB as prescribed on the can, I have a CEL Light. I also noticed that the same day I had a CEL light, that the gas cap was off. But I did tigthen the gas cap and disconnnect the battey cables for 5 min and CEL temp diappears. I also check the air filter, never had the wires replaced, but had the plugs replace 25000-30000kms ago. Could it just be the TB cleaner. Did the gas cap off and driving the vehichle cause a problem? Any ideas. Thanks in advance!!!

2001 Cavalier
150-175 more kms
per tank of same size
Pioneer 12 CD Changer

SOLD Green 98 Mystique
GS Sport
Zetec ,ATX
885 Fogs mod.
Hi beam mod.
205 15s