2A00 - P0491

2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): Service instruction

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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 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

Remove secondary air-injection valve and clean the passage to Bank 1 (in engine block)

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