Question about 2005 Volvo S40

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Oil pressure light on at idle for Volvo S40 MY2005 B5244S4 Engine

Just had fresh oil/filter in after oil leak between the crankshaft casings was repaired. Engine had to be to be removed for this.Had no issues going in to dealer other than leak.The "check oil light"(alladdin lamp)now comes on at idle. Little later the MIL.When you rev it >idle its fine. Oil used is Mobil 1 5W/50. New Oil pressure switch installed and ECM update(due to potential low revs casuing light to come on) for MY2005 chassis number did not fix it. Cleaned Pressure switch connectors with contact cleaner, cleaned ETM,replaced oil,resets didnt solve this. Only thing left is check the one way valve at the oil filter area and filter if clogged. Any advise appreciated...other wise the engine probably has to come down again for inspection. Pls help!

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Since you are going to check the one way valve and cleaning the filter too, I would recommend to check the intake air filter and clean it throughly. After that use carb cleaner to free up the nozzles of the injector valve . If the engine sound better after using carb cleaner, add some into the fuel from the fuel filter or pump, whichever one has easy access, and gun your engine in short bursts, after which it should run better.........sodeep

Posted on Aug 01, 2009


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2006 volvo s40 50,000 mi. noticed a noise under hood that sounded like a belt slipping. sounded more like it was coming from the back of the motor. With the car running,I took the oil dip stick out and the...

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1 Answer

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