For Shop Owners

P0381 VOLKSWAGEN - Glow Plug/Heater Indicator Circuit Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3 What does this mean?

Possible causes

  • Faulty Glow Plug
  • Glow Plug harness is open or shorted
  • Glow Plug circuit poor electrical connection
What does this mean?

When is the code detected?

- The glow plugs are commanded OFF and the glow plug feedback is more than 2 volts. or
- The glow plugs are commanded on and the glow plug feedback is not between 5 volts and 6.2 volts.

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • The engine may be harder to start

P0381 VOLKSWAGEN Description

The glow plug system is used to assist in providing the heat required to begin combustion during cold engine temperatures. The glow plugs are heated before and during cranking, as well as initial engine operation. The engine control module (ECM) controls the glow plug ON times by monitoring coolant temperature and glow plug voltage. The California Glow Plug system has eight individual glow plug supply circuits between the controller and the glow plugs. If the feedback voltage from the controller to the ECM is not within range, DTC P0380 will set.
OBDII Code P0381 Volkswagen - Glow Plug/Heater Indicator Circuit Malfunction -

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P0381 VOLKSWAGEN Comments

Help us improve Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0381 Volkswagen code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 2
1=Easy 2=Moderate 3=Hard

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Posted and Edit by 04-16-2017

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