When to car warms up and rpms are at lowest point the oil pressure light comes on. i had the oil changed and the level is full. it does not happen all the time. it only happens when the engine is at driving temp and then only when we are at a stop. for more than a few seconds
Cars & Trucks - Dodge - Magnum - 2005 Dodge Magnum
Answers & Comments
There are two basic causes. One, that your oil pressure is really too low at idle. You did not state the mileage, but if the vehicle is high-mileage, this is a possibility. The other is the oil pressure sender is bad, and reporting low pressure when it is actually OK. The best way to know for sure is to have a shop test the actual oil pressure using a calibrated gauge. If the vehicle is lower mileage, and you think the pressure is really OK, it may be cheaper for you to just replace the sender as a test(if you are mechanically inclined enough to do it yourself). If the warning light goes out, the old sender was bad.
If replacing the sender does not cure the problem, then you have low oil pressure. This will shorten the life of the engine, so you need to have a mechanic diagnose the problem. Possible causes are: bad oil pump, excessive bearing clearances due to high mileage, oil pump intake blockage due to sludge in the oil pan, stuck pressure relief valve. Unfortunately, none of these problems will be cheap to fix.
Hi have you used a oil flush if give it a go you will have to put new oil in as well or it may be oil pump on is way out