What this code means

The transmission fluid temperature has exceeded the maximum safe operating temperature. Extended operation at high temperature causes fluid breakdown and component damage.

Symptoms

• Transmission temperature warning light
• Limp mode activated
• Reduced shift quality
• Torque converter lockup forced
• Burning smell from transmission area
• Transmission fluid discolored

Common causes

• Towing beyond vehicle capacity
• Transmission cooler blockage
• Cooling fan failure
• Transmission cooler line restriction
• Stop-and-go driving in extreme heat

Diagnostic steps

1. Read transmission temperature PID
2. Inspect transmission cooler and lines
3. Check cooling fan operation
4. Inspect cooler line flow rate
5. Check transmission fluid condition

Repair notes

Allow transmission to cool. Flush and replace transmission fluid if it has been overheated. Clean or replace transmission cooler. Address root cause of overheating.

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