20 Most Recent 2002 GMC Yukon XL - Page 6 Questions & Answers

try reaching under neath car at hood latch and feel for cable and pull on it

Sounds like your bulbs are bad. Doesnt sound like a fuse or your whole dash lights would be out.

it is in limp mode try disconecting the baterry

Could need the throttle body position relearned. I believe on these models you can have someone relearn it with a good scan tool.

You will need to have the computer scanned to get the trouble codes.You can try troubleshooting it the hard way without the codes, but its complicated.

try taking your key phob and holding the unlock and lock button at the same time see what happens.

Take it out of 4 wheel and back up alittle.

when you replace sensor trouble codes must be cleared out. or it will keep showing up, like yours

You need spark at the right time, fuel pressure at the injectors, and normal compression.Have the spark plugs been changed in the past couple of years ?Have you checked the fuel pressure to see if it is enough ?Have you sprayed carb cleaner into the throttle body to try to make the engine try to start ?Does it sound like it has normal compression when cranking ?

Trouble Code: P0161

HO2S-22 (Bank 2 Sensor 2) Heater Circuit Malfunction

Possible Causes:HO2S heater low control circuit is open or shorted to groundHO2S heater circuit is open or it is shorted to groundHO2S heater power circuit is open (test O2A fuse in fuse block)HO2S heater element is damaged or has failedPCM has failed.

Im having a similar problem, sometimes my blower works other days it wont will when it does work no hot air comes out, blower controls change but no hot air, i replaced the thermostat and now my blowers are not working!

One way to check the fuel pump is to turn the ignition to on and listen for the pump to run. It should run for a few seconds. It may be a couple of seconds after you turn the ignition to on before it runs. Normally you can do this repeated times.

If you don't hear the pump run that is most probably the problem.

Should be a thirty or possibly a forty amp fuse.