Pressure Control Solenoid D Data Incompatible

Where it lives

For P27AA, the description names the solenoid as the part involved.

Check these first

• Solenoid D commanded and actual pressure do not agree
• A sticking solenoid D valve body bore
• Debris holding the solenoid D spool
• A failed pressure control solenoid D coil
• A transmission control module with an outdated solenoid D strategy

What to do next

1. Read pressure control solenoid D commanded and actual values
2. Check transmission fluid level and condition
3. Test the solenoid D circuit for opens and shorts
4. Command solenoid D and watch line pressure response
5. Replace pressure control solenoid D if the data stays incompatible
6. Clear the code, road test, and retest

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