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Bank 2 Rich code

swilliams1005

By swilliams1005
in Ask A GM Technician

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swilliams1005 Enthusiast

swilliams1005

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I have a 2000 GMC K2500 4X4 7.4L 454 I have been running in to this same code for awhile now and replaced the o2 sensor and code(P0175) still returns well we took the intake cover off to look at the injectors and the # 2 and 6 were spraying more fuel than the others(looked cleaner at the bottom of the intake) so while having all the stuff off we replaced the regulator and swapped injectors from side to side and 2 weeks later it throws the same code again on passenger side bank 2,,so i take it back to the dealer to make sure it was the same code and it was and they said they have had some similar problems in the past few weeks and the gm tech said that it was the CAT starting to clog up i just purchased 2 new cats and im waiting on some answers from my fellas on the board before i put them on thanks guys.

GM-Tech Senior Enthusiast

GM-Tech

Posted
Posted

If I had my doubts, I'd run a backpressure check on the cats. That's easy enough to do with the right equipment.

 

As for have I seen this... we see many more lean codes than rich, but yeah, there has been a few. I don't have anything specific to tell you that you haven't already done.

swilliams1005 Enthusiast

swilliams1005

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If I had my doubts, I'd run a backpressure check on the cats.  That's easy enough to do with the right equipment. 

 

As for have I seen this... we see many more lean codes than rich, but yeah, there has been a few. I don't have anything specific to tell you that you haven't already done.

 

 

 

 

i'll call my dealer and see if ic can dor a back preassure check on it and see what he says,,, Do you think the computer might have a glitch in it?

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