P0383 - Glow Plug Control Module to PCM Communication Circuit

The ECM detected a fault in communication between the glow plug control module and PCM.

Code Overview

The ECM detected a fault in communication between the glow plug control module and PCM.

Common Causes

• Control module fault
• Damaged communication wiring
• Connector or power issue

Diagnostic Steps

1. Inspect module connectors and power feeds
2. Check communication wiring continuity
3. Look for additional module communication codes

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.