2019 BMW 128i Convertible (E88) L6-3.0L (N51) A L L Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts Page 111
Warning light:
MIL 2nd DC,
CAM operates in emergency default mode
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
1. Check position (valve timing setting) of camshaft and
reluctor
2. Check timing chain and tensioner mechanism.
3. Check VANOS solenoid for dirt and contamiantion
4. Check torque on crankshaft center bolt
Fault effect and breakdown warning
Driver information
Warning light:
MIL 2nd DC,
CAM operates in emergency default mode
Service instruction
none
(DME) Condition For Fault Memory Entry - None
2CA6 - P0135
Information saved in
DME
Fault code
2CA6 - P0135
Fault text
Oxygen sensor heating before catalytic converter, function
Fault description
O2 Sensor Heater Circuit (Bank 1 Sensor 1)
Condition for fault identification
