2A99 - P1553

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

none

2A99

2A99 - P1553

Information saved in

DME

Fault code

2A99 - P1553

Fault text

Crankshaft - exhaust camshaft, correlation

Fault description

Engine Position System 'B' Performance (Bank 1)

Condition for fault identification

Test condition:

NWA synchronized, adaptation enabled Terminal condition: Terminal 15 on Voltage condition:

none

Condition for fault memory entry

On each camshaft tooth flank when the position is out of tolerance.

Action in service

Check position (valve timing setting) of camshaft and reluctor

Check timing chain and tensioner mechanism.

Check VANOS solenoid for dirt and contamiantion

Check torque on crankshaft center bolt

Fault effect and breakdown warning

Driver information Warning light: MIL 2nd DC,

CAM operates in emergency default mode