P0381 - Glow Plug/Heater Indicator Circuit Malfunction

The ECM detected a fault in the glow plug or heater indicator circuit.

Code Overview

The ECM detected a fault in the glow plug or heater indicator circuit.

Common Causes

• Indicator circuit fault
• Wiring problem
• Cluster or module issue

Diagnostic Steps

1. Inspect indicator circuit wiring and connector condition
2. Check for related heater-system codes
3. Verify command and indicator operation

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.