What does code P1384 mean?

Q: What does code P1384 mean?

Knock Sensor 3 Circuit. P1384 on BMW vehicles indicates that the engine control module (DME) has detected an abnormal signal on the circuit for knock sensor number 3, which is responsible for detecting detonation on a specific bank or cylinder group. The computer monitors the sensor's output voltage and flags this code when the signal falls outside the expected range, either too low, too high, or intermittent, preventing reliable ignition timing adjustment.

DTC codes / BMW codes / P1384

P1384 · BMWKnock Sensor 3 Circuit

P1384 on BMW vehicles indicates that the engine control module (DME) has detected an abnormal signal on the circuit for knock sensor number 3, which is responsible for detecting detonation on a specific bank or cylinder group. The computer monitors the sensor's output voltage and flags this code when the signal falls outside the expected range, either too low, too high, or intermittent, preventing reliable ignition timing adjustment.

SystemPowertrain

Code typeBMW specific

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

Guidance is general and written for BMW vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.