Medium and Heavy Trucks
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Hi. Thanks for asking your question! I will try and help you out.
Can you get me the engine serial number please? It may start with MXS, NXS, or SDP.
55 is the result
Thanks for the informaiton Drew.
Code 55 indicates no codes. However on the NXS there are a few codes that do not have a flash code number. The only one that can turn the yellow check engine light on and cause low power is a "Low Intake Valve Actuation System Oil Pressure Fault". I see this a lot.
This code can be caused by several things.
A leak an an intake valve actuator.
A leak at the IVA control valve
A faulty IVA pressure sensor
A faulty IVA relief valve.
Please reply back if you need more help or have more questions. I am happy to assist.