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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 5586
Experience:  Owner at DJ Wilson
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Have fault code SPN 4364 FMI 18? What does this mean? Is it

Customer Question

Have fault code SPN 4364 FMI 18? What does this mean? Is it serious it because the check engine light is on.....and my driver is operating the vehicle?
JA: What's the make/model/year of your truck? Engine type?
Customer: 2012 Freightliner Cascadia.
JA: Are you fixing your truck yourself? What have you tried so far?
Customer: No, nothing yet?
JA: Anything else you want the truck mechanic to know before I connect you?
Customer: No
Submitted: 1 month ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 1 month ago.

Hi my name is***** will be glad to help. Let me check on these codes.

Expert:  Daniel Wilson replied 1 month ago.

SPN 4364/FMI 18 - EPA10
Selective Catalyst Reduction NOx Conversion Low


SPN 4364/FMI 18
Description This fault code sets when the Aftertreatment Control Module (ACM)
detects that the NOx conversion is lower than a calibrated threshold
Monitored Parameter Selective Catalyst Reduction (SCR) Inlet NOx sensor, SCR outlet
NOx sensor
Typical Enabling Conditions Diesel Exhaust Fluid (DEF) dosing enabled, 1000 - 1500 rpm, 15 -
100% load, SCR inlet temperature sensor less than 650°C (1200°F),
ambient temperature greater than 0°C (32°F), coolant temperature
greater than 70°C (158°F), non-regeneration conditions present
Monitor Sequence None
Execution Frequency Continuous when enabling conditions met
Typical Duration 30 Minutes
Dash Lamps MIL
Engine Reaction Derate 25%
Verification Parked Regeneration

Expert:  Daniel Wilson replied 1 month ago.

Click on this link for the troubleshooting

Troubleshooting

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Customer: replied 1 month ago.
Does the driver need to immediately address this fault code because he is currently operating the tractor? How serious is it?
Expert:  Daniel Wilson replied 1 month ago.

If his soot level is high and the truck needs to regen he could face a derate situation.

Expert:  Daniel Wilson replied 1 month ago.

If the soot level is low not requiring regen it will buy some time to get him to a service center but keep an eye on the soot level. He wont be able to run a successful regen until the fault is fixed.

Expert:  Daniel Wilson replied 25 days ago.

Hi, Did you get this resolved?If so, Please take a moment to rate as that is how the site credits my time helping on the site or let me know if you need more help. 5 star and bonuses are always greatly appreciated.

Expert:  Daniel Wilson replied 3 days ago.

Hi, Did you get this resolved?