Truck starts and runs well but when sufficiently warmed up, crankcase sensor reports and shuts down the engine. I have had the truck serviced recently and changed the crankcase sensor and the oil pressure sensor - no change. What are the possible causes, any pointers?
FH12-D12D-420 Crankcase Pressure Problem
Discussion in 'Volvo Forum' started by Amushonga2000, Mar 19, 2014.
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How many miles? It could possibly be excessive blow by.
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Is there a crank case filter on the truck if they get full of oil it will turn on check engine light
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Mileage is about 500000 miles
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first of all check crancase vent tubes, if they are ok I sugest bad crankcase sensor ore bad wiring. Usually bad sensor, spring inside it goes weak and it reads more pressure.
really U can disconnect this sensor and ignore fault code, but if crankcase vent is clogged u may get valve cover blown)))Amushonga2000 Thanks this. -
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