OBDII Code List

P1A04 MERCURY - Generator Shutdown Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • GSDN circuit open.
  • Faulty Transmission Control Module (TCM)
  • Faulty Powertrain Control Module (PCM)

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1a04 Mercury Description

The Transmission Control Module (TCM) continuously monitors the Generator Shutdown (GSDN) circuit and the Controlled Area Network (CAN) signal for a GSDN request from the Powertrain Control Module (PCM). This code is set when the PCM requests generator shutdown through the CAN signal or if there is a GSDN circuit fault. The generator inverter will be disabled.
OBDII Code P1a04 Mercury - Generator Shutdown Circuit -

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P1A04 MERCURY Comments

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