service engine soon light

[cavx5]

hi everyone...the ses light finally came on full steady but the x seems to be running ok...i really dont know what is going on..i dont know if it is a coincidence or the tranny swap did something...will have to take to dealer but in the meantime what do you think...2005 4.4 with 30k miles..rob

[///Bruce]

Unfortunately, the Service Engine Soon light is a catch-all for a thousand-and-one things. It can be anything from a leaky/defective gas cap to an O2 sensor of whch we have four of them to.... You get the idea. So, either purchase a code decoder or drop a few bucks and find a reputable mechanic.