Check engine light- on Glacier Park Switch Backs
 

The check engine light came on twice coming down Logan Pass in Glacier Park, MT today. The first time I removed the gas cap and cycled the start process 3-4 times and light went off. It was running perfectly prior to and during the light being on. 5 hours later coming down the west side of the Pass it came on again (still running fine, I have 1/2 tank of fuel). Could the light have anything to do with the change in elevation?

Could be loads of stuff---have you plugged in and read the codes!!

No, currently on the road and running fine!? I will check out the codes asap, and inform.
thanks

Codes P0130 and P0150
 

P0130 and P0150; Heated Oxygen sensor - Bank 1 sensor 1 and Bank 2 sensor 1.
Explanation provided: open or short circuit.

Like I said, it is running great 28.7mpg while at an average speed of 74mph over 300 miles.

Car has 101k miles, any helpful information would be appreciated.

Assuming you have cleared the faults and they do not return, I agree with your supposition that the high altitude would screw up the Lambda and therefore report a fault!!

thanks Plutoe