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Discussion Starter · #1 ·
Hi all,
on my 2007 525XI with 70K miles (out of warranty by 10K sucks!)
the other day I got an engine warning signal came out.
I used my OBD II to get a reading, below are the codes with discriptions:

P1554 = Idle Speed Control Throttle Position Basic Setting Conditions not met
P1551 = Barometric Pressure Sensor Circuit Short to B+

I cleard the errors with the OBD, then today after 2 days of driving the signal warnign apeard again on my console.
I called BMW dealer, they need to check it out and off cource under usual big$ expense.

Can Anyone assist with these errors exactly what they mean and with a bit of technical background if I can fix it myself. Has anyone had the same issue and how was it fixed?
cheers
 

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hi, i have the same problem, i replaced the 2 camshaft sensors, maf sensor,throttle body, and i still having the same problem, but also when i drive the car, i feel like the car doesnt have too much power, please let me know if you could fix your car, thanks.
 

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Another car with the P1554 problem

I just bought a used 2007 BMW 328xi, and this fault code has just appeared for me too!

Another description of this code (taken from the 2006 330i DTC list) is:
P1554 - Engine Position System 'A' Performance (Bank 1)

My car just rolled over 50,000 miles too, so out of luck with BMW's manufactuer warranty for covering it. I do, however, have the statutory state used car dealer lemon law warranty and an extended warranty (subject to deductible). I'm bringing the car back to the used dealer for them to look at the problem, but of course I'm not getting my hopes up that they'll do much more than clear the code and say it has been fixed (it is quite inconvenient to bring the car back too).

I do note that when I put my key into the slot and switch the car's ignition system ON (but not start the engine), there is a high pitched noise coming from under the hood which lasts for maybe 5 minutes (is that normal?). While I don't have a repair manual for the car, I suspect the fault code is related to this noise, and in particular that throttle body adaptation is failing. My freeze frame confirms the code was thrown just after starting the engine.

The fact that the throttle body was actually changed by someone here and that didn't fix the problem suggests to me that maybe the P1554 is related to some other related sensor failing, such as the throttle position sensor?

Really, has no one yet gotten this problem fixed? I really need to make sure the right part is fixed, not a bunch of other parts that really are good. Thanks.
 

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Discussion Starter · #4 ·
I just bought a used 2007 BMW 328xi, and this fault code has just appeared for me too!

Another description of this code (taken from the 2006 330i DTC list) is:
P1554 - Engine Position System 'A' Performance (Bank 1)

My car just rolled over 50,000 miles too, so out of luck with BMW's manufactuer warranty for covering it. I do, however, have the statutory state used car dealer lemon law warranty and an extended warranty (subject to deductible). I'm bringing the car back to the used dealer for them to look at the problem, but of course I'm not getting my hopes up that they'll do much more than clear the code and say it has been fixed (it is quite inconvenient to bring the car back too).

I do note that when I put my key into the slot and switch the car's ignition system ON (but not start the engine), there is a high pitched noise coming from under the hood which lasts for maybe 5 minutes (is that normal?). While I don't have a repair manual for the car, I suspect the fault code is related to this noise, and in particular that throttle body adaptation is failing. My freeze frame confirms the code was thrown just after starting the engine.

The fact that the throttle body was actually changed by someone here and that didn't fix the problem suggests to me that maybe the P1554 is related to some other related sensor failing, such as the throttle position sensor?

Really, has no one yet gotten this problem fixed? I really need to make sure the right part is fixed, not a bunch of other parts that really are good. Thanks.
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I checked with my dealer who mentioned it might be the "Barometric Pressure Sensor" but intresting enough the engin light disapread by itself two weeks ago and has not give me the warning since!!
I will ask my dealer to change the sensor once I take it for next oil change. this might help to reduce my Gas consumption that I am getting 13.1L/100KM avrage HW/city drive.
 

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I checked with my dealer who mentioned it might be the "Barometric Pressure Sensor" but intresting enough the engin light disapread by itself two weeks ago and has not give me the warning since!!
I will ask my dealer to change the sensor once I take it for next oil change. this might help to reduce my Gas consumption that I am getting 13.1L/100KM avrage HW/city drive.
My Check Engine light went out today on its own. The code is still stored however. I had a repair shop scan for BMW-specific codes, and indeed like the other poster in this thread, there are BMW codes stored for crankshaft sensors, etc. The problem is obviously an intermittent electrical issue in these vehicles.

The repair shop, the extended warraty, and the used dealer (liable under the state mandatory used car dealer's warranty) are now deciding how they handle these repairs. Sounds like no one here has yet determined the real problem that needs to be fixed, however. BTW - I do not have the P1551 Barometic Pressure Sensor code presently.
 

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Just as an addition, I just purchased my 06 325i with 52k on the clock on Tuesday, light came on today with the P1554 error, turned the car off, left it overnight, and the light ended up going out on its own as well.

Kinda weird. At least it isn't a big deal. I was like **** me!

lol
Mario
 
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