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Automatic Transmission Diagnosis

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

Many transmission faults will set one or more diagnostic trouble codes (DTCs) in the PCM/ TCM. In some instances a group of diagnostic trouble codes (DTCs) may indicate a particular fault. The transmission may only operate in default or failsafe modes while certain diagnostic trouble codes (DTCs) are set.

Begin diagnosis by performing the PCM Quick Test. Refer to Refer to Engine Controls - Introduction (Except Diesel & Hybrid) . Record all diagnostic trouble codes (DTCs) and related freeze frame data. Clear the diagnostic trouble codes (DTCs) after recording the information.

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