16705/P0321/000801

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16705/P0321/000801 - Engine Speed Sensor (G28): Implausible Signal

Possible Symptoms

  • Engine shuts off
  • Engine doesn't start
  • Speedometer inoperative
  • Glow Plug Indicator Lamp (K29) flashes

Possible Causes

  • Engine Speed Sensor (G28) loose
  • Engine Speed Sensor (G28) faulty

Possible Solutions

  • Check Engine Speed Sensor (G28)

Special Notes

  • The Engine Speed Sensor (G28) is also used as a reference sensor for the crankshaft position and correlates with the Camshaft Position Sensor Bank 1 (G40) and Camshaft Position Sensor Bank 2 (G163).
  • When found in a 2004 VW New Beetle with 1.9l TDI-PD (BEW), check for TSB number 97-05-04 (supersedes 97-04-06) calling for a flash update to the ECU and a secondary ground installation. This applies if software version is below 6328; current software version should be 7000 or higher.
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