I have just bought a 96 tocoma with the 4 cyl engine. The check engine light is on. It was missing on # 2 cyl. and had oil around the plug and plug wire. Cleaning that up and replacing the plug has it running good now.
How do I determine if the miss on #2 is what caused the check engine light to come on? How do I get the engine light off?
Should I replace the valve cover gasket? There is no leak to the outside, only a little around the plug.
I assume the only way to check the codes is with a code reader. Is this correct?
Thanks for any help.
Charles