2001 Dodge Grand Caravan 3.3 with a #5 injector control wire shorted to ground. This is a common issue on the Caravan and Town and Country models. The wire harness right above the exhaust crossover pipe will melt together and cause multiple problems. MAP sensor codes, injector codes, TPS and IAT codes etc. This problem can also damage the computer ground circuit as well as any other sensors on the 5v reference circuit. (Injector control voltage will spike into the sensor ground circuit of the computer).

Engine Performance Diagnostics chapter 18 pages 3-10

symptoms 50

  • P0205 trouble code (Injector 5 control circuit fires improperly)
  • hard staring (long crank time)
  • start/stall
  • excessive fuel consumption
  • poor gas mileage
  • white smoke from tailpipe
  • fuel odor
  • low power
  • misfire

fix 50

  • repair melted computer harness connector near exhaust manifold crossover pipe (common problem)

test shown enh 50

  • how to test a fuel injector
  • how to test for a short to ground on a fuel injector
  • how to test for injector control

Tools used

  • scan tool
  • lab scope
  • digital multimeter
  • test light

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(Chapters 17, 18 and 19) Fuel Injector Testing

Related videos:

How to test a fuel injector circuit with basic tools:


Lexus Fuel injector failing when hot, misfire (fixed with snow):


How to test a fuel injector (open winding case study) Nissan:


Stuck Closed Fuel Injector (how to fix) GM:


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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available as an eBook or paper book.

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