Volvo All Engines (2010 Emissions) Fault Code: SPN 4339 FMI 1 PID: PSID 90 Aftertreatment SCR Feedback Control Status

Fault Condition:
Adaption too low

Possible Causes:
1) Nox sensor
2) Aftertreatment Diesel Exhaust Fluid (DEF) dosing failure
3) DEF Quality

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