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
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