2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P0491
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C
Terminal condition: Terminal 15, engine start
Voltage condition:
Vehicle electrical system voltage (battery voltage between 7
& 15 V)
Condition for fault memory entry
40 sec.
Action in service
1. Remove secondary air-injection valve and clean the
passage to Bank 1 (in engine block)
2. Install valve again and run through EOL test. If the
malfunction is registered again, repeat steps 1 and 2.
Fault effect and breakdown warning
