Hello. My vehicle is a 2001 V70 T5 with 141,000 miles. After a recent oil change, the oil pressure warning light comes on at low rpms after the car has been driven. There are no leaks and the car burns no oil. Three years ago, I had this problem and I had a mechanic replace all the seals around the oil pump. Problem went away. Back again.

Sensor is also new. Any ideas?

Thanks in advance.

 

Does the engine knock when the message comes on? The main issue with oil pressure that I've seen is the pick up tube seal in the pan, oil pump, and the oil pressure sensor.

 

No knocking. Engine runs smooth as silk. I already replaced the seals at the pick up tube. I'll check out the pressure sensor. Thanks

 

2003 S60 T5 - 149k kms
I checked the oil - I use Castrol High Mileage - 5W-30 - it was on the bottom on crossed section, so it shouldn't be ANY problem, but, I added about a liter of the same oil. Was good for couple kms and then again - red light and a message. On and off without any pattern. What can be wrong? Oil pump? No way! It must be a sensor, I continued to drive, but it still bothers me...
And - I think this is because of extreme cold - minus 20C. Some lights on a dashboard don't work - radio lights, lights switch area on the left side ( although exterior lights are OK) Speedometer and tachometer lights are dim, message board lights are dim too.
Where is that sensor?
thanks for any input
greg1