Medium and Heavy Trucks
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Hi my name is***** will be glad to try to help. Bare with me while I look up your code info
3226 4 Aftertreatment outlet NOX Voltage below normal or shorted low. If the sensor is new then inspoct the harness and connector pins for corrosion, shorts, chafed wiring, or damage. As long as the fault is still active it will not reset or clear.
Thanks for the info. It is possible but FMI 4 is for Voltage below normal or shorted low which means the ECM is detecting a short or low voltage from the sensor signal. If it were Data valid but above or below range then it indicates a good sensor circuit but the ECM is detecting out of range values. That is why I was suggesting taking a close look at the harness and connector pins for the sensor or try running separate wires for test purposes to the ECM. For you question I would see if you can do a parked regen but it will likely not complete with this active fault but you could try. Let me know
Hi, Did you get this resolved?
Thanks for the update. Keep me posted. Pleasure to help