DTC P1385 BMW
Knock Sensor 4 Circuit Malfunction
Knock Sensor 4 Circuit Malfunction
Description
Engine started, vehicle driven at 1520rpm for 3 seconds or to a temperature of 40 degrees Celsius, and the DME detected the Knock Sensor 1 (KS1) signal was not recognized. The engine speed is greater than 2080rpm but less than 6000rpm and the coolant temp
Cause and Solution
Knock sensor circuit is open
Knock sensor is loose (tighten to 20 NM)
Contact between the knock sensor and cylinder block is dirty, corroded or greasy
Knock sensor circuit is shorted to ground, or shorted to power
Video Guide
Diagnostic Info
- DTC Code: P1385
- Brand: BMW