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multiple codes 09 gmc 2500 HD 6.0


massbowtie

Question

2009 GMC 2500 HD with a 6.0 gas engine. Engine light came on today and it has multiple codes. They are P0135,P0030,P2272,P2271,P0138. Some are for 02 sensors and others for knock sensor. Can anyone tell me if there is a relationship between the 2 sensors, like is one of the sensors causing multiple codes for both sensors or are they totally separate issues. I replaced a knock sensor on the passenger side over a year ago, the 02`s are original. truck has 47,000 miles on it. I just don't want to replace all the sensors if its just say it`s the o2 sensors causing all of them ?

Thanks for any help you can give.

Mike.

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