check engine light codes

[point-man]

I have a 2008 tahoe flowmaster exhaust cold intake. Factory remote start. I installed the exhaust wnd filter myself. After the install I would get check engine light of and on . Did the re tighten the fuel cap basic. The light would go off on its own most of the time until recent when it stayed on for about 2 weeks. Took it to the shop cocodes p036 p0121 p0141 p2270 p2271.

After reading some threads figured I would change the 02 sensors . Changed all 4 code went away. Drove around the city for about a week no prob but when I went on 5he highway the light came back on after doing about 50 to 60. What could possibly be wrong did the reset ecm by removing the fuse while running. Unpluggin the battery light still on . What could be 5h3 possible solutions from what ive been reading I may have a short. But dont have the tools and looks very complicated to test ecm o2 connections etc. Also when the check engine light is on my remote starter wont work. Could this be playing a role.

I havent noticed any loss of power truck runs great I just miss my remote start since winter is here

 

[rockenthebowtie]

The 02 sensor DTCs will set with a exhaust system leak and even a modified exhaust if those are the DTCs that reset you either have an exhaust leak or the modified exhaust system isnt working well with your truck... it also may be that DTC p0121 may have rest.. clean out the throttle body... and yes when there are any type DTCs that trigger the SES light to illuminate the remote start system will no function..

 

[point-man]

Did as you said took it out on the highway opened it up code came back cleared it opened it up again no code. Only prob is the car is kinda jumpy from the take off was idling at high rpms but seems to be adjusting

 

[rockenthebowtie]

Yea your going to need to let the idle relearn due to the throttle body cleaning

 

[point-man]

Yeah I browsed some threads on it so I'll see what happens. Thanks for the help tho. I try to keep away from stealerships.

 

[rockenthebowtie]

De nada..

 

[autoexpert]

I have a 2008 tahoe flowmaster exhaust cold intake. Factory remote start. I installed the exhaust wnd filter myself. After the install I would get check engine light of and on . Did the re tighten the fuel cap basic. The light would go off on its own most of the time until recent when it stayed on for about 2 weeks. Took it to the shop cocodes p036 p0121 p0141 p2270 p2271.

After reading some threads figured I would change the 02 sensors . Changed all 4 code went away. Drove around the city for about a week no prob but when I went on 5he highway the light came back on after doing about 50 to 60. What could possibly be wrong did the reset ecm by removing the fuse while running. Unpluggin the battery light still on . What could be 5h3 possible solutions from what ive been reading I may have a short. But dont have the tools and looks very complicated to test ecm o2 connections etc. Also when the check engine light is on my remote starter wont work. Could this be playing a role.

I havent noticed any loss of power truck runs great I just miss my remote start since winter is here

You can check below URL on Why my engine light is on?
http://checkenginecode.com/why_my_engine_light_is_on.html