I've had my Mustang now for 6 years and 120 000 km. It is a GT convertible. Driving home from the mountains today the Check Engine warning lit up.

I need to take it in for the 120 000 km service anyway, and I do have the Ford extended warranty upto 150 000 km for 500 components.

What questions should I be asking before they start diagnosing the problem?

What is wired up to that light? What are some possible problems associated with it?

I just want to be informed before I take it in, as it may not be covered.

Cheers

 

Cats might be done in. Has is gotten any harder on fuel. Any drivability problems. Could be as simple as an o2 sensor

 

Mileage did seem a bit worse than usual on this trip.

 

Is that indicative of the catalytic converters, or the O2 sensor?

I not well informed when it comes to these things.

 

Well if it is a sudden change that means something with the motor changed. And the o2 sensors are crucial in the motor managing itself properly. When mine went bad I had less power and it got really bad on fuel.

 

Hmm. It got worse mileage on the trip, but not by a massive margin. Light didn't gone on until I was almost home. (I did hit a pretty big dip in the road, though). Still, is replacing the sensor a big deal?

Thanks for the help, by the way.

Cheers

 

Is it just those 2 possibilities, by the way?

 

If you have an Autozone or an Advance Auto Parts near you, you can take it there. I know here in the states they will hook up the scanner and pull the codes for you for free. That is a good place to start

 

I would need the Alberta equivalent. I'm not sure where to go for a free diagnostic. Otherwise, I need to pay $100 for the dealer to do it.

 

It could be alot of things. I don't know if part source clears codes.

 

Parts source won't do it in Canada...at least in Ontario.

Best bet is to have a mechanic friend do it....or buy an OBDII reader for no less than $150