2921 SPN Fault Code

Name:

XBR Acceleration Limit

Description:

The brake system may temporarily or generally limit the maximum brake performance available for external systems. A temporary limit may be nessary due to high brake temperature; a general limit may be defined by the vehicle manufacturer, e.g. a value of -2.5 m/s² due to liability reasons. The actual limit is communicated to the external systems that request braking. The limit is only effective in the XBR Priorities 01b to 11b. It is specified as an absolute acceleration in reference to the road.

2921 spn fault code name is XBR Acceleration Limit. If you don't take the time to look into 2921 spn fault when it arises, it can add up quickly. One small issue like 2921 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 2921 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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