7621 SPN Fault Code

Name:

Engine Cylinder 13 Low Frequency Knock Level

Description:

Indicates the level of low frequency knock for engine cylinder 13. This knock occurs at frequencies below the typical knock level reported on SPNs 1364 & 6446. The level of low frequency knock is reported using a relative scale where 0% is least level of knock, and increasing levels indicate more low frequency knock until 100% indicates the most severe level of low frequency knock allowed or measurable for the engine. If only one knock level is supported per cylinder, use SPN(s) 1364 (and 6446).

7621 spn fault code name is Engine Cylinder 13 Low Frequency Knock Level. If you don't take the time to look into 7621 spn fault when it arises, it can add up quickly. One small issue like 7621 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 7621 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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