2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P135B
2E69 – P135B
Information saved in
DME
Fault code
2E69 – P135B
Fault text
Knock-sensor signal 2
Fault description
Knock Sensor 2 Circuit Range/Performance (Bank 1)
Condition for fault identification
Test condition:
Knock sensor signal monitor
Vehicle road operation at >2800 1 rpm (current data status,
76
tends toward >2560 rpm) and air mass > 180 mg/unit. It is
not possible to clear fault by switching ignition terminals.
Compliance with the activation conditions and absence of
malfunction extending over several seconds are required
before fault code can be cleard.
Terminal condition: Terminal 15, engine on
Voltage condition:
Voltage in onboard electrical system > 10 V
Condition for fault memory entry
The debounce time is derived from assessment of statistical
diagnosis
Action in service
1. Check knock sensor connection to verify that it is tight.
2. Check wire connecting knock sensor 1 and enginemanagement
control module
3. Check for connection between knock sensor 1 and ground
or positive
4. Replace knock sensor
Fault effect and breakdown warning
Driver information
Warning light:
No warning message. (No closed-loop knock control
available. Power loss, as engine reverts to operation in safe
