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Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

CHECK FOR AN INTERNAL TRANSMISSION PROBLEM
1. This DTC is an informational DTC.
2. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.
3. This is usually a sign of Torque Converter Clutch failure or an internal transmission problem.
4. Check the Engine and Transmission Cooling Systems for proper operation.
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  Repair
  - Repair internal Transmission, Torque Converter, and/or Transmission and Engine Cooling systems as necessary. Refer to DIAGNOSIS AND TESTING .
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.