spn-3224-fmi-4 Mercedes Fault Code :
Read the description of spn-3224-fmi-4 in KAMA3-5490 and the engine lights up for KAMA3 5490 Fault Codes code, there are some possible causes for it.
Fault Location
NOx Sensor
Fault Description
Circuit Low (Bank 1)
Fault PIN
LSCAN-MR