Medium and Heavy Trucks
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Hi John, My name is***** will be glad to try to help. What do you have logged for fault codes?
Engine Oil Pressure Data Valid But Below Normal Operating
Range - Moderately Severe Level
Engine Oil Rifle Pressure - Data Valid But Below Normal Operating Range - Moderately Severe Level
Check the actual oil pressure with a mechanical guage to see if there is an actual problem with low or fluctuating oil pressure.
It could be oil pump, suction tube sucking air ( damaged/cracked), oil filter bypass valve or pressure regulator.