2AAF and 2FDB shadow codes, anything to worry about?

MadDog89 · 08-23-2020, 10:50 PM

Car runs fine but getting these two shadow codes, no CEL.

2AAF DME:Fuel Pump, plausibility.
2FDB Crankshaft Sensor, signal: not plausible.

I checked the forums up and down, found some threads but nothing solid.

Any idea what these shadow codes mean?

siphor1989 · 08-23-2020, 10:59 PM

I've been getting the same 2FDB shadow code with no driveability issues too... It seemed to have happened ever since I updated the MHD app and flashed a map.

MadDog89 · 08-23-2020, 11:11 PM

Quote:

Originally Posted by siphor1989

I've been getting the same 2FDB shadow code with no driveability issues too... It seemed to have happened ever since I updated the MHD app and flashed a map.

I too noticed these after MHD update to v8.0, first the 2AAF and now 2FDB.

Eckohwd · 06-23-2021, 06:30 PM

any updates on this? getting 2fdb -Crankshaft signal not plausible,

and getting stumbles or hesitation when cruising, Al's only in cold starts I'm getting small misfires new everything, injectors, plugs, coils except for the vanos solenoids and crankshaft sensor

relative4 · 06-23-2021, 10:04 PM

MHD v8 maps are a no-no.

OP, what are your mods and tune?

Saif2018 · 06-24-2021, 04:04 AM

Quote:

Originally Posted by Eckohwd

any updates on this? getting 2fdb -Crankshaft signal not plausible,

and getting stumbles or hesitation when cruising, Al's only in cold starts I'm getting small misfires new everything, injectors, plugs, coils except for the vanos solenoids and crankshaft sensor

First Flash v7.1 or v9, then clear codes and recheck

2AAF can be ignored if HPFP and LPFP are fine (HPFP stays at 1500psi or more and LPFP stays above 50Psi WOT)

Have you had Walnut blasting done?

haaken675 · 06-24-2021, 11:10 AM

Did I miss something? Are there issues with the v8 maps? I have the same shadow codes as well.

Saif2018 · 06-24-2021, 01:17 PM

Quote:

Originally Posted by haaken675

Did I miss something? Are there issues with the v8 maps? I have the same shadow codes as well.

Yes, it's been reported to have issues.

haaken675 · 06-24-2021, 01:19 PM

Quote:

Originally Posted by Saif2018

Yes, it's been reported to have issues.

Interesting I don't follow to closely...Searched for MHD v.8 issues and didn't come up with anything. Will reflash with v.9 and see how it does.

Saif2018 · 06-24-2021, 01:23 PM

Quote:

Originally Posted by haaken675

Interesting I don't follow to closely...Searched for MHD v.8 issues and didn't come up with anything. Will reflash with v.9 and see how it does.

I've seen it reported by users way back , probably not in dedicated threads, MHD also updated to V9 shortly afterwards.

Eckohwd · 06-27-2021, 03:17 AM

Quote:

Originally Posted by Saif2018

Quote:

Originally Posted by Eckohwd

any updates on this? getting 2fdb -Crankshaft signal not plausible,

and getting stumbles or hesitation when cruising, Al's only in cold starts I'm getting small misfires new everything, injectors, plugs, coils except for the vanos solenoids and crankshaft sensor

First Flash v7.1 or v9, then clear codes and recheck

2AAF can be ignored if HPFP and LPFP are fine (HPFP stays at 1500psi or more and LPFP stays above 50Psi WOT)

Have you had Walnut blasting done?

Quote:

Originally Posted by Saif2018

Quote:

Originally Posted by Eckohwd

any updates on this? getting 2fdb -Crankshaft signal not plausible,

and getting stumbles or hesitation when cruising, Al's only in cold starts I'm getting small misfires new everything, injectors, plugs, coils except for the vanos solenoids and crankshaft sensor

First Flash v7.1 or v9, then clear codes and recheck

2AAF can be ignored if HPFP and LPFP are fine (HPFP stays at 1500psi or more and LPFP stays above 50Psi WOT)

Have you had Walnut blasting done?

yes i got a walnut blast done about 4k miles ago,
new hpfp OEM from bmw, stage 2 lpfp
I'm not flashed have jb4 installed but not on

Saif2018 · 06-27-2021, 04:05 AM

Quote:

Originally Posted by Eckohwd

yes i got a walnut blast done about 4k miles ago,
new hpfp OEM from bmw, stage 2 lpfp
I'm not flashed have jb4 installed but not on

So your using MHD and JB4 is turned off?

If so, flash v7.1 or v9 stage 1 and do a Datalog. Or alternatively if your on stock map with MHD, then Datalog.

Make sure LPFP and HPFP, STFT and LTFT, Lambda are logged.

Kg8221 · 07-30-2022, 07:58 PM

I have solved this issue by flashing back to stock then reflash your tune!

08-23-2020, 10:50 PM	#1
MadDog89 Second Lieutenant 57 Rep 250 Posts Drives: 2007 335i E92 Join Date: Apr 2019 Location: California iTrader: (0)	2AAF and 2FDB shadow codes, anything to worry about? Car runs fine but getting these two shadow codes, no CEL. 2AAF DME:Fuel Pump, plausibility. 2FDB Crankshaft Sensor, signal: not plausible. I checked the forums up and down, found some threads but nothing solid. Any idea what these shadow codes mean? __________________ 2007 335i 17T EBAY Turbos, FBO, Stage 2 LPFP, Index 12 Injectors, 2 Step Colder Plugs, OEM Coils
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08-23-2020, 10:59 PM	#2
siphor1989 Lieutenant 205 Rep 569 Posts Drives: 2020 m340i xdrive Join Date: May 2015 Location: . iTrader: (3)	I've been getting the same 2FDB shadow code with no driveability issues too... It seemed to have happened ever since I updated the MHD app and flashed a map.
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06-23-2021, 06:30 PM	#4
Eckohwd Enlisted Member 15 Rep 41 Posts Drives: 2009 335i coupe Join Date: May 2018 Location: Hayward, Ca iTrader: (0)	any updates on this? getting 2fdb -Crankshaft signal not plausible, and getting stumbles or hesitation when cruising, Al's only in cold starts I'm getting small misfires new everything, injectors, plugs, coils except for the vanos solenoids and crankshaft sensor
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06-23-2021, 10:04 PM	#5
relative4 Major 616 Rep 1,276 Posts Drives: '08 335xi E90 MT stage 1+ Join Date: Feb 2019 Location: Denver, CO iTrader: (0)	MHD v8 maps are a no-no. OP, what are your mods and tune?
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06-24-2021, 11:10 AM	#7
haaken675 First Lieutenant 105 Rep 304 Posts Drives: 24v turbo e30, e92 335i Join Date: Feb 2020 Location: FL iTrader: (0)	Did I miss something? Are there issues with the v8 maps? I have the same shadow codes as well.
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07-30-2022, 07:58 PM	#13
Kg8221 New Member 0 Rep 25 Posts Drives: 07 335i n54 Join Date: Nov 2016 Location: Pacific Northwest iTrader: (1)	I have solved this issue by flashing back to stock then reflash your tune!
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