spn-4809-fmi-4 Mercedes Fault Code :
Read the description of spn-4809-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
Catalyst Temperature Sensor (Bank 1 Sensor 1)
Fault Description
Circuit Low Input
Fault PIN
LSCAN-MR