P1673 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


OBD-II Trouble Shooting Got a code reader? Find out what your GM car's Check Engine light is trying to tell you (and then turn Check Engine light off).

 
 
 
 
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Old 09-27-2009, 01:53 PM   #1
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Default P1673

P1673

Description
ENGINE HOT LIGHT CONTROL CIRCUIT

Output Driver Modules (ODM) are used by PCM to turn on
current-driven devices needed to control various engine and transaxle
functions. Each ODM can control up to 7 outputs by supplying ground to
device PCM is commanding on. ODMs can diagnose each circuit
individually. If ODM output (ENGINE HOT light indicator driver
circuit) detects an improper voltage level, DTC will set.

Symptoms
You likely won't notice any drivability problems.

Causes

  • An improper voltage level has been detected on ENGINE HOT
    light indicator driver circuit.

Solutions
  • Check for shorts or bad connections in ENGINE HOT light
    control circuit.
  • Replace fuse.
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