P0381

Glow Plug/Heater Indicator Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

The glow plug indicator does not light up when the ignition is turned on
Difficulty starting the engine in cold weather
Floating idle speed after starting

Causes

Open or short circuit in wiring harness
Faulty glow plug relay
Problems with the indicator on the dashboard
Engine control unit malfunction
Oxidation of contacts in the circuit

How to Fix

Checking the integrity of the indicator circuit wiring harness
Testing the operation of the glow plug relay
Checking the indicator on the dashboard
Engine control unit diagnostics
Cleaning and restoring contacts in the circuit

Related codes

P0380 P0671 P0672