What this code means

The transmission fluid condition sensor or monitoring algorithm has determined the ATF has deteriorated beyond serviceable limits.

Symptoms

• Check Engine Light or service reminder
• Shift quality degradation
• Transmission temperature running higher
• Dark or burnt-smelling fluid
• TCC shudder may develop
• Increased shift time

Common causes

• Extended fluid service interval exceeded
• Overheating episodes degrading fluid
• Contamination from internal wear
• Wrong fluid type previously used
• Fluid oxidation from age

Diagnostic steps

1. Check ATF color, smell, and clarity
2. Read fluid condition sensor data
3. Monitor transmission temperatures
4. Test fluid viscosity if possible
5. Review fluid service history

Repair notes

Perform transmission fluid and filter service immediately. If fluid is severely burnt, multiple fluid exchanges may be needed. Use only manufacturer-specified ATF.

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