Volvo All Engines (2010 Emissions) Fault Code: SPN 3226 FMI 14 PID: PSID 90 Aftertreatment Outlet NOx

The NOx sensor measures the amount of NOx in the exhaust system. The NOx sensor is connected in the J1939-2 data link. This diagnostic trouble code (DTC) indicates a NOx monitoring failure. For example; NOx sensor short- or open circuit, NOx sensor removed, NOx sensor missing signal.

Conditions for diagnostic trouble code (DTC):
1) Incorrect value, Voltage supply

Observable symptoms
1) None

Probable cause
1) Ignition key left on for a extended time with the engine off
2) Poor ground connection
3) Voltage supply interrupted
4) Jump starting
5) Battery cable connections
6) Battery
7) Alternator
8) NOx sensor

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