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Home >> Lincoln >> 2018 >> MKZ Select, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2134 (Engine Controls - Powertrain Diagnostics - DTC P1261 Through DTC P2185 - (Diesel)) >> DTC P138B - Glow Plug Control Module System Voltage

DTC P138B - Glow Plug Control Module System Voltage

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DTC DESCRIPTION P138B - GLOW PLUG CONTROL MODULE SYSTEM VOLTAGE

Description:  The glow plug control module (GPCM) monitors the system supply voltage. This DTC sets when the GPCM detects an under voltage or over voltage condition.
Possible Causes: 
  • VPWR circuit open
  • VBATT circuit open
  • Damaged GPCM
Diagnostic Aids:  Glow plug function is disabled when the system voltage is below 6.5 volts and above6.5 volts.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST AF .
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