2019 BMW 128i Convertible (E88) L6-3.0L (N51) A L L Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts Page 60
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 锟斤拷C
-3.8 锟斤拷C < Coolant temperature < 50.3 锟斤拷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
Driver information
Warning light:
MIL
Service instruction
none
2A00 - P0492 (DME)
2A00 - P0492
Information saved in
DME
Fault code
2A00 - P0492
Fault text
Secondary-air system
Fault description
Secondary Air Injection System Insufficient Flow (Bank 2)
Condition for fault identification
Test condition:
Activation conditions:
- Engine start
- Secondary air-injection must be active
- Ambient temperature >3 锟斤拷C
-3.8 锟斤拷C < Coolant temperature < 50.3 锟斤拷C
Terminal condition: Terminal 15, engine start
Voltage condition:
Vehicle electrical system voltage (battery voltage between 7
& 15 V)
Condition for fault memory entry
