Rear Differential Fluid Temperature High

What this code means

The rear differential fluid temperature has exceeded the safe operating limit.

Symptoms

• Differential warning light
• Reduced traction system function
• eLSD or locking differential disabled
• Differential whine or noise

Common causes

• Aggressive driving or towing in hot conditions
• Low differential fluid level
• Incorrect differential fluid specification
• Differential cooler blocked or damaged
• Worn differential bearings generating heat

Diagnostic steps

1. Check differential fluid level and condition
2. Inspect differential cooler if equipped
3. Verify correct fluid specification
4. Listen for bearing noise
5. Check for fluid leaks

Repair notes

Allow to cool. Change fluid to correct specification. Repair cooler if blocked. Address any leaks.

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