BMW fault code A1EF

Rear-compartment air conditioning

In the rear-compartment air conditioning, code A1EF means different things depending on the version of the module in the car. Find your car below; the app shows the right one for yours.

FKA: Interior-temperature sensor

Module version: Rear-compartment air conditioning (FKA_70)

In: X5 (E70) 2006–2013, X6 (E71) 2008–2014, X6 (E72) 2009–2011

FKA: Rear-compartment air-flow, left

Module version: Rear-compartment air conditioning (HKA_E65)

In: 7 Series (E65) 2001–2008, 7 Series (E66) 2002–2008, 7 Series (E67) 2002–2008

Reading and clearing it

Fault code A1EF is a BMW code, stored in the car's rear-compartment air conditioning, not a generic OBD2 code (P0xxx): a generic OBD2 reader only reaches the engine's emissions faults, so it won't show it. AutoLingo for BMW reads it with BMW's own diagnostic protocols, in plain English, with the details the module stored about it, and clears it after a repair. If a fault comes right back after it's cleared, the problem is still there.

The rear-compartment air conditioning is on: 7 Series (E65), 7 Series (E66), 7 Series (E67), X5 (E70), X6 (E71), X6 (E72)

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