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BMW 3-Series (E90 E92) Forum
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PO299
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| 02-09-2013, 03:50 PM | #1 |
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P0299 error code, need help!
Turbocharger/supercharger 'A' underboost condition
Hey guys. Can anyone enlighten me as to what this actually means and what needs to be done about it. I'm running a JB4 on map 5 with a DCI only on 93 octane. The car puts me into limp mode when I'm WOT in 3/4 gear and reaching 4500+ rpm. Doesn't happen with half throttle or anything. I appreciate your input ahead of time!
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J.D.
2008 335i - JB4 / BMS DCI / Premium Package / Sport Package / 6AT |
| 02-11-2013, 04:40 AM | #3 |
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Nobody has had this code? Searching comes up with nothing and even google shows me different makes of cars with this code.
When I get on a computer ill load the image from INPA that shows the error code. I would love any help out there. Not sure if it needs to go into dealer or not.
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J.D.
2008 335i - JB4 / BMS DCI / Premium Package / Sport Package / 6AT |
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| 02-11-2013, 05:15 AM | #4 |
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boost leak probably. read the code with JB4
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07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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| 02-11-2013, 05:53 AM | #5 |
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Running stock DVs or Forge? Could be leak in vacuum lines or stuck Forge DVs.
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Vargas S2 turbos|VAC S3 Cylinder head|RR DPs|RR MPs|Supersprint X pipe|Remus Quad Sport mufflers|aFe Stage 2 Si with scoops|Forge DVs|ER CP|BMS meth elbow|Aquamist HFS-4|Walbro 450 E85 LPFP|AA FMIC|BMS OCC|MHD|P3 Boost Gauge|Ohlins Road & Track + camberplates|M3 sways F/R+ Ground control endlinks|Vorsteiner v303 19"|Michelin PS2 sport|Quaife LSD|Vorsteiner V35 CF hood|CF CLS trunk|Duke Dynamics quad diffusor
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| 02-11-2013, 07:23 AM | #6 |
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Running stock. Just JB4 and DCI.
Only happens under load 3-4 gear at higher rpm. WOT in 1-2 no issue. And reading the code with the JB4? I know that's a feature but would it not just show the same code...
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J.D.
2008 335i - JB4 / BMS DCI / Premium Package / Sport Package / 6AT |
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| 02-11-2013, 07:49 AM | #7 |
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just do it, probably a leak anyway.
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07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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