Mack MR690S 9021 SPN Fault Code

Name:

DC/DC 4 Low Side Voltage

Description:

Indicates the measured SLI battery or low side voltage measured at the point of control inside the DC/DC Converter.

Mack MR690S 9021 spn fault code name is DC/DC 4 Low Side Voltage. If you don't take the time to look into Mack MR690S 9021 spn fault when it arises, it can add up quickly. One small issue like Mack MR690S 9021 can cause a larger component to become damaged without taking the time to investigate. If you suspect your truck is suffering from one of these issues, look into replacing those small components to save money down the road.

Note: The name and description of Mack MR690S 9021 code represents text descriptions for faults supported by another coding system and does not necessarily comply with SAE J1939. For a specific engine manufacturer's explanation for codes, please consult the engine's technical manual. See also other spn codes.

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