AFM lifter Failure = new engine + Many problems

[07denaliyuk]

Help me rescue my Denali from the dealership
2015 Yukon XL Denali, 6 speed

AFM lifter failure damaged camshaft and dropped parts into the Motor: GM Stepped up and provided a new motor, that's when the problems started:

1st time it was "done" 90 miles, the CEL
- Injectors replaced on new motor

2nd Time it was "done" 40 miles to CEL
- P2098 Code
- replace both right side O2 sensors
- replace CAT converter NOT cheap...

3rd time it was "done" 84 miles to CEL
- P2098 Code
- ???

?? What else can they try ??

 

[Tahoe14]

I would contact GM customer service and get them involved. I would also speak to the Service Manager to see if this issue can be resolved. They in turn would need to contact GM to help determine what is causing the issue. You could also try a different GM Dealer if you are not happy with the current one.

 

[Doubeleive]

my guess would be the new engine likely did not include a new intake/injectors or fuel rail (but I guess it could have) so possibly not related to the new motor at all, same for 02 sensors those definitely would not have been engine related, your getting a lean code, check fuel pressure.

 

[swathdiver]

When the motor blew it seems like parts went through the combustion chamber and out into the exhaust stream. This will damage and or destroy the O2 sensors and the cats.

 

[randeez]

Help me rescue my Denali from the dealership
2015 Yukon XL Denali, 6 speed

AFM lifter failure damaged camshaft and dropped parts into the Motor: GM Stepped up and provided a new motor, that's when the problems started:

1st time it was "done" 90 miles, the CEL
- Injectors replaced on new motor

2nd Time it was "done" 40 miles to CEL
- P2098 Code
- replace both right side O2 sensors
- replace CAT converter NOT cheap...

3rd time it was "done" 84 miles to CEL
- P2098 Code
- ???

?? What else can they try ??

if all this is getting done at the dealer they should be able to troubleshoot it.
if it were me id check the wiring harness make sure nothing was damaged while engine was pulled and replaced if youve swapped the o2 sensors and cat on that side already. find someone with a standalone wideband and see if the that cylinder bank is actually running lean

im not really up on the DI stuff, but is there any reason that only that bank would go lean via low fuel pressure? is there a test port/relief/pressure sensor on that side what could cause pressure to drop if faulty?

 

[07denaliyuk]

Update 12/28
GM tech won’t work on it unless I replace the magnaflow with the original muffler. I saved them and put it on again.

I informed them that I’ve had the magnaflow on for 35,000 miles with no CEL codes and their heavy engine tech has the same exhaust with no problems.

Stay tuned!

 

[iamdub]

Update 12/28
GM tech won’t work on it unless I replace the magnaflow with the original muffler. I saved them and put it on again.

I informed them that I’ve had the magnaflow on for 35,000 miles with no CEL codes and their heavy engine tech has the same exhaust with no problems.

Stay tuned!

Ehrmagerd. So it's one of THOSE techs...

 

[BG1988]

Help me rescue my Denali from the dealership
2015 Yukon XL Denali, 6 speed

AFM lifter failure damaged camshaft and dropped parts into the Motor: GM Stepped up and provided a new motor, that's when the problems started:

1st time it was "done" 90 miles, the CEL
- Injectors replaced on new motor

2nd Time it was "done" 40 miles to CEL
- P2098 Code
- replace both right side O2 sensors
- replace CAT converter NOT cheap...

3rd time it was "done" 84 miles to CEL
- P2098 Code
- ???

?? What else can they try ??

sounds like they scammed you


P0420 is a catalytic converter issue on GM

 

[swathdiver]

Update 12/28
GM tech won’t work on it unless I replace the magnaflow with the original muffler. I saved them and put it on again.

I informed them that I’ve had the magnaflow on for 35,000 miles with no CEL codes and their heavy engine tech has the same exhaust with no problems.

Stay tuned!

That's dishonest. "Doveryai no Proveryai" Trust but verify!

 

[01FormulaTA]

sorry to hear this...I dont know if I would be able to keep my cool if I heard these idiots try to blame these issues on a muffler....do you hear any ticking sounds when driving (like an exhaust leak)?

Have them replace your exhaust manifold gaskets and Gasket at the y-pipe....that code can be caused by exhaust leaks