Diagnostic article Generic OBD-II
P0372: Missing crankshaft reference points
BMW P0372 identifies too few crankshaft reference events in the documented N62TU monitor.
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Documented application
2008 BMW 750Li (E66), N62TU 4.8L; BMW DME monitor chart reproduced by Operation CHARM.
The code alone does not identify a failed part or establish that a vehicle is safe to drive. Confirm the vehicle, reporting module and applicable service procedure.
In the N62TU chart, BMW fault 2B5D/P0372 is stored after at least three crankshaft reference points are not detected. The monitor runs while the engine is turning with Terminal 15 active. This provides a concrete interpretation of “too few pulses”: the controller is losing expected reference information.
Missing events narrow the investigation
A sensor may produce some output and still fail to deliver every required event. A basic observation that engine speed appears on the scan tool therefore does not settle this fault. The missing-reference criterion calls for attention to signal continuity and the relationship between the sensor and reluctor.
BMW directs checks of the plug, harness, and sensing geometry before replacing the sensor as indicated. That combination covers the electrical path and the physical generation of the reference pattern. The chart does not supply pin assignments, an air-gap dimension, or a universally correct waveform, so those details require the matching repair information.
Secondary behavior can follow the lost reference
The listed reactions include emergency strategies for variable valve lift, VANOS, and RPM sensing, with the emissions lamp requested on the second driving cycle. Such reactions can complicate a symptom-based diagnosis: altered engine behavior after the code appears may be the controller's response to missing timing information.
A meaningful verification demonstrates reliable detection of the reference points during the relevant operating state. Clearing the memory or observing a momentary RPM reading is weaker evidence. The three-event criterion is specific to this source and should not be transferred to another BMW engine or another manufacturer's P0372 implementation.
Source and applicability
BMW diagnostic chart, P0372. 2008 BMW 750Li (E66), N62TU 4.8L; BMW DME monitor chart reproduced by Operation CHARM. These values describe that documented monitor; they are not universal specifications for every vehicle displaying this code.
Article source documents
Source checks describe how the text was prepared; they do not certify a diagnosis or confirm compatibility with every vehicle using this code.
Original code reference
Dictionary definition
Timing Reference High Resolution Signal A Too Few Pulses
This definition retains its original catalog scope. The article above is limited to its explicitly documented application.
Reference scope
Generic OBD-II definition.
A manufacturer label does not establish the model, year, engine or module to which a diagnosis applies. Read the safety and diagnostic limits.
Definition source
- DTC Database: pinned community code definitions
Source checked · MIT