P0600
Medium SeveritySerial Communication Link
Electrical System
P0600 — Instant Answer
Serial Communication Link
Severity: MEDIUM SEVERITY
Meaning: Communication error within the ECM or between the ECM and scan tool.
Safe to drive? Usually yes with caution, but confirm root cause before long trips.
Estimated repair cost: $0 - $500
Most common causes:
- 1. ECM internal fault (10-25% of cases)
- 2. Poor ground connection (35-45% of cases)
- 3. Damaged OBD2 port (10-25% of cases)
Symptoms
- ⚠️Check engine light
- ⚠️Scan tool communication issues
- ⚠️Multiple random codes
Related Symptoms
Common Causes
How to Diagnose P0600
- 1Check all ECM ground connections
- 2Inspect OBD2 port for damage
- 3Try different scan tool
- 4Check ECM connector
OEM Procedures for P0600
P0600 affects the Engine Control Module. Found 146 OEM service manual procedures.
12 90 120 Removing and installing/replacing control unit bracket (Cooper 4-door hatchback, Cooper 2-door hatchback, 2020-2023) - Replacement: Remount DME control unit and the integrated supply module (PDM)
12 90 120 Removing and installing/replacing control unit bracket (Cooper 4-door hatchback, Cooper 2-door hatchback, 2020-2023) - Replacement: Remount DME control unit and the integrated supply module (PDM)
12 90 120 Removing and installing/replacing control unit bracket (Cooper 4-door hatchback, Cooper 2-door hatchback, 2020-2023) - Replacement: Remount DME control unit and the integrated supply module (PDM)
12 90 120 Removing and installing/replacing control unit bracket (Cooper 4-door hatchback, Cooper 2-door hatchback, 2020-2023) - Replacement: Remount DME control unit and the integrated supply module (PDM)
12 90 120 Removing and installing/replacing control unit bracket (Cooper 4-door hatchback, Cooper 2-door hatchback, 2020-2023) - Replacement: Remount DME control unit and the integrated supply module (PDM)
12 90 120 Removing and installing/replacing control unit bracket (Cooper 4-door hatchback, Cooper 2-door hatchback, 2020-2023) - Replacement: Remount DME control unit and the integrated supply module (PDM)
12 90 120 Removing and installing/replacing control unit bracket (Cooper 4-door hatchback, Cooper 2-door hatchback, 2020-2023) - Replacement: Remount DME control unit and the integrated supply module (PDM)
12 90 120 Removing and installing/replacing control unit bracket (Cooper 4-door hatchback, Cooper 2-door hatchback, 2020-2023) - Replacement: Remount DME control unit and the integrated supply module (PDM)
Showing 8 of 146 procedures
OEM Diagnostic Flowchart
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OBD2 scanner
Read codes and freeze-frame data before you guess at the fault.
Most diagnostic jobs start with a scan tool and a verified code path.
Shop on Amazon →Battery tester
Check cranking and charging health before replacing expensive parts.
A weak battery can mimic alternator or starter problems.
Shop on Amazon →Multimeter kit
Confirm voltage, continuity, and sensor power with one simple kit.
A meter is the cheapest way to rule out a bad circuit fast.
Shop on Amazon →Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0600.
OEM Manual Evidence
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A L L Diagnostic Trouble Codes ( DTC ) — 2013 Dodge and Ram Avenger L4-2.4L Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Dodge and Ram Avenger V6-3.6L Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge...
Related Symptoms
Browse →Exact Vehicle Hubs
Browse →Open the exact vehicle hub grounded by OEM manual evidence related to P0600.
Open the exact vehicle hub grounded by OEM manual evidence related to P0600.
Open the exact vehicle hub grounded by OEM manual evidence related to P0600.
Open the exact vehicle hub grounded by OEM manual evidence related to P0600.
Related Codes
Frequently Asked Questions
- Does P0600 mean the computer is bad?
- Not necessarily — check grounds and connections first. A corroded ground is a much more common cause than a failed ECM.
- Is ECM replacement expensive?
- ECMs cost $200-$800 and may need programming. Always rule out wiring issues first.
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Author & Review
Written by AllOEMManuals Editorial Team. Reviewed by ASE-certified technicians and updated with factory-reference checks for fitment-sensitive steps.
This guide was drafted with AI assistance and reviewed for accuracy by a human editor.
Last updated: 2026-05-07