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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Question about the 29F3 Fuel pressure sensor Electrical



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      12-15-2015, 10:01 PM   #1
HomieTheClown
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Question about the 29F3 Fuel pressure sensor Electrical

Hear me out please. I just fixed my trifecta (DSC,ABS/ Yellow brake) light today after being broke for 7 months. Yeah I know.. no excuses...

After those 3 lights cleared my SES light remained so I pulled the codes through INPA. I thought I finally fixed my car but I guess it had another issue.

I got 29F3 Fuel Pressure Sensor electrical &
2D33 Absolute Pressure Sensor, Intake Pipe: Signal

So I found a lot of very helpful thread about the 29F3 issue. After reading the thread, it seems my low pressure sensor hpa value is stuck at 6700ish. It sounds like I need to simply change out the full pressure sensor.

However I don't know the nature of the 2d33 sensor. I don't know if it's happening because of the 29F3 or is the 29F3 sensor becaused caused by the 2D33...

See my dilmena. Please advise
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      12-16-2015, 10:52 AM   #2
HomieTheClown
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Additional pics added

Here's a picture of the fuel low pressure sensor stuck at 6501 hPa when it should be around 5000. Also here are the two codes I pull up.

The sensor probably needs replacing but I still want to know what's causing the other issue (2D33) before I throw money at it.

Sorry pics were to BIG
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      12-17-2015, 10:55 AM   #3
HomieTheClown
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Hoping to get a response before I waste money on buying a new sensor.
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      12-17-2015, 01:06 PM   #4
siphor1989
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In my case, I first started getting a P2AAF code and then eventually the sensor kept reading high (around 90 psi). A couple weeks later, I got a P29F3. Replaced the sensor with a bmw one and now both codes are gone and lpfp reads 72psi like normal.
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      12-19-2015, 12:08 PM   #5
HomieTheClown
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Thanks. I'll give it a shot and replace the sensor. I hope it clears the other code.
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