Reduced engine power
Rennlist Member
Joined: Oct 2004
Posts: 1,878
Likes: 1,253
From: Lakewood Ranch, FL
Ill try them again now that I have some proof and hopefully they have seen it on other cars now that the platform is 4+ years
Instructor
Joined: Jul 2024
Posts: 114
Likes: 118
From: South Shore, MA
Ugghh...my 2021 S 7MT has started to do this at 21k miles in the past few weeks with increasing frequency. Tried a tank with a bottle of Techron with no improvement. Last Friday, happened about 5 times in a 20 minute drive. I can typically induce it by doing a light pull in 2nd or 3rd and abruptly letting off the gas. I hooked up my Veepak bluetooth dongle and used the CarScanner android app to try to read a code, but since there was technically no MIL, nothing showed up.
So I got up Saturday with the intention of having the error and driving to the dealer without turning the car off -- drove around for 3 hours with no error. Of course.
So I got up Saturday with the intention of having the error and driving to the dealer without turning the car off -- drove around for 3 hours with no error. Of course.
Instructor
Joined: May 2017
Posts: 239
Likes: 130
tried to replicate the error this morning but failed. Decided to just drive in to my dealer anyway.
They took it in and said theyll run the diagnostics to see what fault codes were logged.
now its just a waiting game because the dealer is swarmed with cars waiting to be worked on
They took it in and said theyll run the diagnostics to see what fault codes were logged.
now its just a waiting game because the dealer is swarmed with cars waiting to be worked on
Race Car
Joined: Aug 2020
Posts: 3,657
Likes: 2,349
tried to replicate the error this morning but failed. Decided to just drive in to my dealer anyway.
They took it in and said theyll run the diagnostics to see what fault codes were logged.
now its just a waiting game because the dealer is swarmed with cars waiting to be worked on
They took it in and said theyll run the diagnostics to see what fault codes were logged.
now its just a waiting game because the dealer is swarmed with cars waiting to be worked on
Pro
Joined: Jun 2021
Posts: 549
Likes: 493
Ugghh...my 2021 S 7MT has started to do this at 21k miles in the past few weeks with increasing frequency. Tried a tank with a bottle of Techron with no improvement. Last Friday, happened about 5 times in a 20 minute drive. I can typically induce it by doing a light pull in 2nd or 3rd and abruptly letting off the gas. I hooked up my Veepak bluetooth dongle and used the CarScanner android app to try to read a code, but since there was technically no MIL, nothing showed up.
So I got up Saturday with the intention of having the error and driving to the dealer without turning the car off -- drove around for 3 hours with no error. Of course.
So I got up Saturday with the intention of having the error and driving to the dealer without turning the car off -- drove around for 3 hours with no error. Of course.
Racer
Joined: Apr 2022
Posts: 333
Likes: 145
From: Melrose, MA
Ugghh...my 2021 S 7MT has started to do this at 21k miles in the past few weeks with increasing frequency. Tried a tank with a bottle of Techron with no improvement. Last Friday, happened about 5 times in a 20 minute drive. I can typically induce it by doing a light pull in 2nd or 3rd and abruptly letting off the gas. I hooked up my Veepak bluetooth dongle and used the CarScanner android app to try to read a code, but since there was technically no MIL, nothing showed up.
So I got up Saturday with the intention of having the error and driving to the dealer without turning the car off -- drove around for 3 hours with no error. Of course.
So I got up Saturday with the intention of having the error and driving to the dealer without turning the car off -- drove around for 3 hours with no error. Of course.
Rennlist Member
Joined: Oct 2021
Posts: 421
Likes: 328
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Advanced
Joined: May 2023
Posts: 77
Likes: 43
From: CT
I made a post about this. Look at my history but it was fuel injectors on my 2020 c2s. Happened with full throttle or in sport response mode. Repaired under emissions warranty for free. I was able to induce the error at command (sport response on in sport mode full throttle), and then when the warning triggered I immediately drove to dealer (dont turn car off otherwise error goes away). Good luck.
Rennlist Member
Joined: Oct 2004
Posts: 1,878
Likes: 1,253
From: Lakewood Ranch, FL
Not sure if the Turbo uses different injectors than Carreras but for the Turbos:
New part number: 0PB128616B
Old part number: 0PB128616A
Last edited by Master Deep; Jun 18, 2025 at 10:42 AM.
Instructor
Joined: Jul 2024
Posts: 114
Likes: 118
From: South Shore, MA
Brought mine into the dealer today (Porsche Westwood) -- warning came on during the drive in and they pulled codes as soon as I pulled up. No faulty injector codes -- I think my SA had actually read this thread 
He said they've never replaced an injector on a 992 before that he could remember.
Tech thought it was odd that the reduced engine power warning displays without the MIL.
Instead it showed code P2B3100 which indicates the radiator fan in front of the right front tire was not operating. Tech confirmed that to be the case so I suspect they are going to replace that and give the car back to me and I'll hope that was the issue.
He said they've never replaced an injector on a 992 before that he could remember.Tech thought it was odd that the reduced engine power warning displays without the MIL.
Instead it showed code P2B3100 which indicates the radiator fan in front of the right front tire was not operating. Tech confirmed that to be the case so I suspect they are going to replace that and give the car back to me and I'll hope that was the issue.
Last edited by RRedline; Jun 20, 2025 at 04:38 PM. Reason: not BMW duh