08 550i p0120 please help!

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05-14-2018, 06:33 PM

ff54976

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08 550i p0120 please help!

I keep having an ongoing issue with this code. I put in a brand new battery, that didn't help. I put a new oem throttle body, that helped a little. I spliced a new connector on the throttle body harness that worked for 2 weeks or so now the code comes back and my car goes into limp mode.
Is there something I'm missing? Please help!

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05-14-2018, 07:02 PM

FormerE30Owner

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Quote:

Originally Posted by ff54976

I think that that code is generic for throttle pedal position sensor. Perhaps the sensor on the pedal is bad.

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05-15-2018, 05:10 AM

ff54976

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is there a specific bmw code that points to the throttle pedal?

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05-15-2018, 11:39 AM

FormerE30Owner

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Quote:

Originally Posted by ff54976

is there a specific bmw code that points to the throttle pedal?

Probably, but have you had the throttle position sensor checked?

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05-16-2018, 10:53 AM

ff54976

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isn’t the throttle position sensor on the side of the throttle body? That was the first thing I replaced

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05-17-2018, 04:46 AM

FormerE30Owner

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Quote:

Originally Posted by ff54976

isn’t the throttle position sensor on the side of the throttle body? That was the first thing I replaced

Yes, but I mean the actual pedal in the driver compartment. Perhaps the pedal itself is defective.

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05-17-2018, 07:46 AM

ff54976

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I replaced the pedal assembly two days ago and it didn’t help at all

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05-17-2018, 11:27 AM

FormerE30Owner

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Looks like you need to get someone to read the codes with a BMW specific code reader. Somehow, now, I think that you might have an issue with the harness which you say you spliced and it worked for 2 days.

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