P2172 code, dealer opening a "star case"

[Psifer]

I have dealt with this issue previously, but it was due to my very unique setup, which would not directly relate to what you're experiencing. From my understanding of the issue, the P2172 "Sudden High Airflow" code is triggered by an issue that occurs before the cylinder heads.

There are 3x MAP sensors bolted onto the supercharger. It's hard to tell, but based on your previous messages, it sounds like the NC dealership only replaced one MAP sensor. Vacuum leaks, throttle body issues, map sensors, or resistance in either signal or ground circuits for the map sensors are where I'd start to look.

I'm not sure which Pittsburgh dealership you're dealing with, but there is only one that I am even willing to let look at my truck(Jim Shorkey North Hills). They're the only Power Broker dealership locally and have had SRT-certified mechanics. I'm not too sure if they still do, as they went through a lot of techs recently. Even then, I have my fair share of qualms with that dealership. Best of luck with your issues.

 

[SBTrx]

I have dealt with this issue previously, but it was due to my very unique setup, which would not directly relate to what you're experiencing. From my understanding of the issue, the P2172 "Sudden High Airflow" code is triggered by an issue that occurs before the cylinder heads.

There are 3x MAP sensors bolted onto the supercharger. It's hard to tell, but based on your previous messages, it sounds like the NC dealership only replaced one MAP sensor. Vacuum leaks, throttle body issues, map sensors, or resistance in either signal or ground circuits for the map sensors are where I'd start to look.

I'm not sure which Pittsburgh dealership you're dealing with, but there is only one that I am even willing to let look at my truck(Jim Shorkey North Hills). They're the only Power Broker dealership locally and have had SRT-certified mechanics. I'm not too sure if they still do, as they went through a lot of techs recently. Even then, I have my fair share of qualms with that dealership. Best of luck with your issues.

Thanks for the info man, im passing along every bit to the service manager that i come across in hopes that something helps. Somewhere along the line there was 1 MAP sensor replaced along with the MAF sensor.

Shorkey North Hills is like 15 minutes from my house. Going to a different dealer has crossed my mind recently. The truck is at Ron Lewis in pleasant hills only because its convenient to my work which is where i am during most business hours. Might be worth a shot to switch. Ill try anything at this point!

 

[Psifer]

Thanks for the info man, im passing along every bit to the service manager that i come across in hopes that something helps. Somewhere along the line there was 1 MAP sensor replaced along with the MAF sensor.

Shorkey North Hills is like 15 minutes from my house. Going to a different dealer has crossed my mind recently. The truck is at Ron Lewis in pleasant hills only because its convenient to my work which is where i am during most business hours. Might be worth a shot to switch. Ill try anything at this point!

I forgot to mention that there is a 4th MAP sensor on the snout of the supercharger after the throttle body, but to clarify, our trucks do NOT have any MAF sensors. So if the dealership is telling you they replaced a MAF sensor, I would suggest taking your truck elsewhere. Ron Lewis in Pleasant Hills is my least favorite of all local CDJRs. Both their service and sales departments have done me wrong in the past. You couldn't pay me to take my truck there. It's been several years, so hopefully they have made improvements since then, but it sounds like their technicians have not gotten any better.

 

[SBTrx]

I forgot to mention that there is a 4th MAP sensor on the snout of the supercharger after the throttle body, but to clarify, our trucks do NOT have any MAF sensors. So if the dealership is telling you they replaced a MAF sensor, I would suggest taking your truck elsewhere. Ron Lewis in Pleasant Hills is my least favorite of all local CDJRs. Both their service and sales departments have done me wrong in the past. You couldn't pay me to take my truck there. It's been several years, so hopefully they have made improvements since then, but it sounds like their technicians have not gotten any better.

Im certainly not impressed, it seems they have 0 trouble shooting processes to narrow things down. Just throwing parts and shooting from the hip. They already have the engineer scheduled to come thursday so ill give them one more chance. Ill call Shorkeys next. All good things to know, thanks for the input!!