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      04-07-2026, 03:12 PM   #1
Frostburn
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Drives: 130i, Porsche 911, Honda S2000
Join Date: Apr 2026
Location: United Kingdom

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N52 130i LCI 5V Reference 1 Accelerator Pedal Issue

Hi, I've recently had trouble with poor pedal response with it being laggy so I checked the codes and it came up with a bunch of pedal and throttle valve related ones, (2CF9, 2CFA, 2D09, 2D1D).

For context the car had a tyre blow out and multiple limp modes due to a dodgy battery then sat for a whole, and this is all happening after a new battery and trying to get it running again. Everything else works fine just the pedal is the issue.

I replaced out the throttle valve and the pedal and it's exactly the same, I've had a cloned DME fitted and swap between the two but it's the same. I've checked the voltages on INSTA and with the original pedal connected the 5V reference one is 1.23v with a different pedal (not exactly the same connector position but same connector) it's 3.27v. When the pedal is disconnected INPA shows both voltages at 5V.

Assuming it's some sort of voltage drop somewhere, I unplugged the eccentric shaft sensor, MAF, TPS but it still 1.27 with the pedal connected. Is it possible both pedals a faulty given they show different voltages? I'm unsure how to proceed and would appriciate some help, thanks.
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