TRANSMISSION ?

[Oasisbob]

Had our Kia Sedona tuned up & serviced prior to a trip from Portland to Yosemite to hike. Leaving home the check engine light came on and went on and off for the tntire trip. Upon our return we were told by the dealer the transmission coded a problem. Car works fine, shifts well. Dealer wants to replace transmission via extended warranty. Great except that it will take two weeks to order & install new factory transmission. How can it be going out and still drive fine? wE HAVE TOWED WITH THIS RIG FOR 92k

[Oasisbob]

Excellent conclusion. Thank you. I had no idea that is how codes worked? Much apreciated. Yes, the van is at max probley over CVWR .

[Campfire_Time]

Codes are the result of failed tests that occur at regular intervals. Most likely what ever component is starting to fail no longer meets the specifications that the test looks for. Note, "starting" to fail. It may drive just fine for now, but that's why it throws a code, as a warning. It's on it's way out. I suspect that if you continue to drive it you'll find out how soon the transmission will actually die.

You've towed a hybrid trailer with it for 92k miles. That trailer is already at or over your max towing capacity and most likely the frontal area drag of the trailer is what contributed to the transmission. Not to mention you've got 4 kids, I'm sure you're way over your cargo capacity on the van. It was really only a matter of time...