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Home › Mazda › 2003 › 6 s, Standard › Repair and Diagnosis › External Pages › Different variant/trim › Section 1 (Engine Controls [Self-Diagnostics 2.3L]) › Diagnostic Tests › DTC P0601: Internal Control Module Memory Check Sum Error › Possible Causes

Possible Causes

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Possible causes are:

PCM internal ROM malfunction.
Reprogramming has not been completed properly.