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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 > Half Engine Light at Idle or Coasting (2f0c & 2d58)

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      01-17-2017, 02:57 AM   #1
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Drives: E92 335i
Join Date: Jun 2008
Location: Vancouver, B.C

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Half Engine Light at Idle or Coasting (2f0c & 2d58)

Hey, Guys

Recently my car (2007 335i - Stock - Automatic) has started producing the dreaded reduced power half engine light. This usually happens when I am sitting at a red light, going down hill (off the gas), or coasting. The light comes on and the rpm's start jumping from 1000-1500 every second. The gas pedal is completely unresponsive and the only way to fix it is to pull over and restart the engine. This happens almost every time I drive the car.

Codes I've received so far:

2F0C intake air temperature, signal: gradient
Error will cause an error light
Error is not currently present
Test conditions have been completed

2D58 DME digital motor electronics, internal failure: control nominal torque?
EXPLANATION: Not a tuner detection code
FIX: Delete or ignore

Things i've replaced so far in order to attempt repair:
New battery
Replaced both TMAP sensors (Manifold and Chargepipe)
Standard PCV with RB PCV

Video of the behaviour

Any ideas?
Appreciate 0


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