P0380 Toyota Glow Plug/Heater Circuit A Malfunction

P0380 Toyota Glow Plug/Heater Circuit A Malfunction

Possible causes
– Faulty Glow Plug
– Glow Plug harness is open or shorted
– Glow Plug circuit poor electrical connection
What about the obd code?
– 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.
Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
– The engine may be harder to start
P0380 Toyota 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 Toyota will set.

Toyota Vehicle:Toyota Prius,Toyota Celica,Toyota Supra,Toyota Carina,Toyota Camry,Toyota MR2,Toyota Aygo,Toyota 4Runner,Toyota Avalon,Toyota Camry,Toyota Corolla,Toyota FJ Cruiser,Toyota Highlander,Toyota Land Cruiser,Toyota Matrix,Toyota Prius,Toyota RAV4,Toyota Sequoia,Toyota Sienna,Toyota Solara,Toyota Tacoma,Toyota Tundra,Toyota Yaris,

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