That is the code fot the O2 sensor. Usually fails at or around 100k. Need to get it fixed to clear most inspections.
yukon denali
Trouble code P0440 means:Evaporative emission control system malfunction
Trouble code P0740 means:Torque converter clutch circuit malfunction
Change the driver side O2 sensor that is after (To the rear or back of) catalytic converter.
Trouble code P0135 means:O2 sensor heater circuit malfunction (bank 1,sensor 1)
Trouble code P0135 means:O2 sensor heater circuit malfunction (bank 1,sensor 1)
The airport code for Fort Yukon Airport is FYU.
Trouble code P0135 means: HO2S Heater Performance Sensor 1 Trouble code P0420 means: Catalyst System Low Efficiency (Bank 1)
Code of the Yukon - 1918 was released on: USA: December 1918
If you are asking about Yukon, Alaska, the closest airport is Kenai Municipal, and its code is ENA.
If its like my Volvo...you need to reenter your secret code on the radio. usually after 3 hours of driving with the radio on, ( that's how my Volvo worked) Code comes from the dealer. I'd go to this website, they can get you the unlock code to your specific radio. Http://WWW.DELCOLOCKCODES.COM
Denali