The P2006 code means:

👉 The intake manifold runner control (IMRC) flaps are stuck CLOSED

These flaps regulate airflow inside the intake manifold.

The P2004 code means:

👉 The intake manifold runner control (IMRC) system is stuck open

Inside the intake manifold, there are flaps (runners) that control airflow.

The BMW 29E1 code indicates a fuel mixture control problem on Bank 2.

The BMW 2A2C code is a mixture-control fault for bank 2. In BMW-specific fault lists and forum diagnostics, 2A2C is repeatedly associated with fuel mixture control on bank 2, and depending on DME variant and companion codes it can point to a condition that is effectively too lean or too rich rather than naming one failed part by itself.

The BMW 2E85 code is most commonly tied to a BSD bus communication fault involving the electric coolant pump. In many BMW diagnostic reports, 2E85 appears as a “BSD, message; electric coolant pump: missing” or similar wording, which means the DME is not receiving the expected communication from the pump over the BSD line.

BMW fault code 2F4A usually points to an EWS/CAS-to-DME interface problem. In practical terms, the engine computer and the immobilizer/start authorization system are not communicating correctly or are not agreeing on authorization data. BMW code lists commonly describe 2F4A as “Interface EWS-DME electronic vehicle immobilization / digital motor electronics.”

The BMW fault code 29F2 indicates a problem with the high-pressure fuel system, specifically that the fuel pressure in the rail is not reaching or maintaining the required level.

The 2AAF fault is one of the most discussed BMW fuel-system codes, especially on turbo engines such as the N54 and early N55. In practice, it points to a fuel delivery plausibility problem rather than naming one failed part with certainty. That is why this code often sends owners in the wrong direction toward an immediate HPFP replacement, even though the real cause can also be the low-pressure fuel pump (LPFP), a low-pressure sensor, wiring, or a broader fueling imbalance. BMW-focused sources and technician discussions consistently tie 2AAF to the relationship between requested and actual fuel supply rather than to a single guaranteed component failure.

BMW engines use a technology called VANOS, which is their version of variable valve timing (VVT). The system dynamically changes the timing of the camshafts to improve power, efficiency, and emissions.

The BMW fault code 2A82 indicates a problem with the VANOS intake solenoid, which controls the intake camshaft timing in BMW engines.