Engine Speed Monitoring DDE 4.0

Two sensors have the task of monitoring the engine speed:

• Crankshaft position/rpm sensor
  
• Camshaft Hall-effect sensor
  

Errors in the signals provided by these sensors are recorded in one of these fault codes:

• 0335 "Crankshaft position/rpm sensor"
  Possible types of faults:
  - Engine overspeed
  - Signal dynamically implausible
  
• 1E25 "rpm sensor monitoring"
  Possible types of faults:
  - Camshaft signal frequency too high
  - Failure of rpm sensor signal, crankshaft
  - Crankshaft position/rpm sensor signal dynamically implausible
  - Failure of camshaft sensor signal