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P1621



DTC P1621

Description
This diagnostic applies to internal microprocessor integrity conditions within the powertrain control module (PCM). This diagnostic also addresses if the PCM is not programmed.

Test Description
The number below refers to the step number on the diagnostic table.
2 A DTC P0602 indicates the PCM is not programmed.

Step 1 - 5:





Step 6 - 7:




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