7661 SPN Fault Code

Name:

Aftertreatment 1 Outlet Percent Oxygen 2

Description:

The second measurement of the actual oxidation factor (percent oxygen) of the gas within the exhaust stream. For positive values, the parameter represents the percent oxygen in excess of the amount required for stoichiometric combustion. For negative values, the parameter is proportional to the amount of oxygen being pumped by the sensor. This value is measured by a sensor at the aftertreatment outlet in exhaust bank 1.A value of -12% (0000h) indicates rich, a value of 21% (FAFFh) indicates lean. These data points could optionally be used with switching O2 sensors to indicate those states as alternatives to broadcasting the threshold %O2 values. Diagnostic Tools could change display to use the text � Rich � or � Lean � in place of the implied %O2 values which would also be acceptable for display.

7661 spn fault code name is Aftertreatment 1 Outlet Percent Oxygen 2. If you don't take the time to look into 7661 spn fault when it arises, it can add up quickly. One small issue like 7661 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 7661 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.

7661 SPN Fault Code

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