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Diagnostic trouble codes (DTCs)

A diagnostic trouble code (DTC) is stored if the accessory electronic module (AEM) detects a fault. This control module can store up to 6 diagnostic trouble codes (DTCs), the 3 first and the 3 latest.

Should a fault disappear for any reason after being permanently stored in the control module as a diagnostic trouble code (DTC), the information remains stored in the memory.

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