3B

UnclassifiedSpeed

What This Code Means

RPM Read Failure; Choke opens to half position

Possible Causes

  • •30 seconds in Key ON position with no RPM

Suggested Actions

  1. 1Crank engine to read RPM and clear error
  2. 2Replace Master controller/ignition
  3. 3Test rotary stepper motor individually using stepper motor controller tool and jumper lead tool

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for 3B on your specific Rehlko unit — cited to the OEM manual, not a forum guess.

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