Mercedes-Benz P1244 Error Code: How to Fix It
Medium 2-4 hours High Severity
Verified June 2026
- Error Code
- P1244
- Brand
- Mercedes-Benz
- Product Type
- automotive
- Severity
- High
- DIY Difficulty
- Medium
- Estimated Fix Time
- 2-4 hours
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Tools You'll Need
- OBD2 scanner
- Digital multimeter
- Wire strippers
- Electrical tape
- Heat shrink tubing
- Wire brush
- Electrical contact cleaner
- Dielectric grease
- Basic hand tools
How to Fix Error Code P1244
-
Ensure Vehicle Safety
Never work on electrical components with the engine running or battery connected. Allow engine to cool to prevent burns from hot components. -
Connect OBD2 Scanner
-
Locate the Engine Wiring Harness
-
Visual Inspection of Wiring
-
Check All Connections
-
Test Harness Continuity
-
Clean Corroded Connections
-
Repair or Replace Damaged Components
Use only automotive-grade wire and connectors. Improper repairs can cause fires or additional electrical problems. -
Reconnect and Test
-
Monitor for Code Return
Parts You May Need
OBD2 diagnostic scanner
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Engine wiring harness section
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Electrical connectors
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Automotive electrical wire
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OBD2 diagnostic scanner
Check Price on Amazon
Engine wiring harness section
Check Price on Amazon
Electrical connectors
Check Price on Amazon
Automotive electrical wire
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
Engine wiring harness section
Check Price on Amazon
Electrical connectors
Check Price on Amazon
Automotive electrical wire
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
Engine wiring harness section
Check Price on Amazon
Electrical connectors
Check Price on Amazon
Automotive electrical wire
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
Engine wiring harness section
Check Price on Amazon
Electrical connectors
Check Price on Amazon
Automotive electrical wire
Check Price on Amazon
OBD2 diagnostic scanner
Check Price on Amazon
Engine wiring harness section
Check Price on Amazon
Electrical connectors
Check Price on Amazon
Automotive electrical wire
Check Price on Amazon
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When to Call a Professional
Contact a qualified Mercedes-Benz technician if you find extensive harness damage requiring major replacement, if the code persists after repairs, or if you're uncomfortable working with automotive electrical systems. Professional diagnosis may be needed if multiple related codes are present or if the harness damage is in hard-to-reach areas.Frequently Asked Questions
Can I drive my Mercedes with P1244 error code?
It's not recommended to drive with P1244 as it indicates an engine harness fault that can cause unpredictable engine behavior, stalling, or complete shutdown. Have it diagnosed and repaired immediately.
How much does it cost to fix Mercedes P1244 error?
Repair costs vary from $200-800 depending on the extent of harness damage. Simple connector cleaning may cost $200-300, while major harness replacement can cost $500-800 including labor.
What causes Mercedes P1244 engine harness faults?
Common causes include rodent damage to wires, corrosion from moisture intrusion, chafing against engine components, heat damage from exhaust proximity, and normal wear from engine vibration over time.
Will P1244 cause my Mercedes to fail inspection?
Yes, P1244 is a high-severity code that will typically cause your vehicle to fail emissions testing and safety inspections until properly repaired and the code is cleared.
How do I prevent future P1244 errors in my Mercedes?
Regular maintenance includes checking for loose engine covers that might allow rodent access, ensuring proper harness routing away from heat sources, and having electrical connections inspected during routine service.