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Old 09-23-2014, 06:00 PM   #1
bluba
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Help. Check engine light code

Anyone one know what's going on with a code that showed up?Check engine light is on. P0506 code in OBD I I Bmw-fc code is 128. Idle air control system rpm lower than expected. I have HPF pro efi system on car! This is not an pro efi code. Air/fuel ratio is pegged at 18. Very rough idle and once started, I can give in much gas or car looses power and bucks. Thank
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Old 09-23-2014, 07:03 PM   #2
323tom
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My pro efi car did the same and it was a wide band sensor, I would call pro efi or your tuner to verify though
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Anyone one know what's going on with a code that showed up?Check engine light is on. P0506 code in OBD I I Bmw-fc code is 128. Idle air control system rpm lower than expected. I have HPF pro efi system on car! This is not an pro efi code. Air/fuel ratio is pegged at 18. Very rough idle and once started, I can give in much gas or car looses power and bucks. Thank
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Old 09-23-2014, 08:20 PM   #3
bluba
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My pro efi car did the same and it was a wide band sensor, I would call pro efi or your tuner to verify though
Thanks
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Old 09-23-2014, 08:42 PM   #4
bmwchuck
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Have you load tested the battery recently? Possibly clean the MAF sensor pins with electrical contact cleaner?
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Old 09-24-2014, 10:53 AM   #5
323tom
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No prob if it's the wideband I believe you can order a new one from Innovate if your tuner or pro efi doesn't have one in stock
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Old 09-24-2014, 03:29 PM   #6
gt35rm3
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Or just swap over to the stock dme with maximum psi.....
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Old 09-24-2014, 07:21 PM   #7
323tom
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Lol +1 but obviously he's running e85 if he has pro efi which maxpsi hasn't release yet...
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Old 09-28-2014, 12:29 AM   #8
bluba
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Ended up being a bad fuel pressure sensor. Made the fuel pressure real high which made the car run rich
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