2A00 – P0491 (DME)
2A00 – P0491
Information saved in
DME
Fault code
2A00 – P0491
Fault text
Secondary-air system
Fault description
Secondary Air Injection System Insufficient Flow (Bank 1)
Condition for fault identification
Test condition:
Activation conditions:
– Engine start
– Secondary air-injection must be active
– Ambient temperature >3 掳C
-3.8 掳C < Coolant temperature < 50.3 掳CTerminal condition: Terminal 15, engine startVoltage condition:Vehicle electrical system voltage (battery voltage between 72010-2020 BMW 128i Convertible (E88) L6-3.0L (N51) WWW.168MOTIVE.COM Page 60& 15 V)Condition for fault memory entry40 sec.Action in service1. Remove secondary air-injection valve and clean thepassage to Bank 1 (in engine block)2. Install valve again and run through EOL test. If themalfunction is registered again, repeat steps 1 and 2.Fault effect and breakdown warning
