The most common reason for the oil pressure light to come on when your vehicle is idling, is low oil. Check your engine oil and make sure the oil is up to the full mark on the dipstick.
If the check engine light is flickering then there could be a loss wire.
The idling speed is automatically sensed ....and set by the Air control valve
It is zero: when it is idling.
The oil pressure gauge will fluctuate on a Chevy Tahoe when the vehicle is idling and when the vehicle is driven at highway speed. Idle is usually 30 psi oil pressure or slightly more. At highway speed, the oil pressure should be between 60 psi and 80 psi.
Oil Pressure Warning Light ActivationThe oil pressure warning light activates from a pressure sensing switch in the engine oil lubricating system. When the oil pressure goes below a preset minimal safe pressure for the engine , the light is supposed to come on.The speed of the oil pump is directly proportional to the engine speed, and if the engine turns too slowly, then the oil pump turns too slowly, and the output volume of oil will be reduced.To my recollection, the most probable causes of activation of the low oil pressure warning light on deceleration of the vehicle are:The oil level in the crancase is LOW, orThe engine idle speed is set too low, and thus the oil pump output is low.
AnswerIf the engine is idling very low - oil pump may not generate enough pressure, causing light to come on. Make sure you have adequate oil, and that idle speed is correct. If this does not correct, possibly oil pump screen dirty It could also be the oil sensor is bad or leaking. This happened in my 1996 Chevy Corsica. I thought it was the oil pump, but it turned out to be just the sensor that needed to be replaced.
the tranny light comes on, because the idle speed or timing need to be adjusted.
speed sensor
800 RPM
Decrease pressure on the accelerator pedal, or downshift, in order to reduce your speed. Warning light will be extinguished.
I had all sensors replaced in my 03 Trailblazer and the check engine light stiil comes on. Why?
In Wikipedia speed of light is defined as 'in international distance of units (SI) the meter is defined as the distance of light traveled in vac-cum in 1/299,792,458 of the second. This definition fixes the speed of light at 'exactly' 299,792,456 meters/second. This definition is the 'classic' example of what is called as 'circular logic'. When it comes to shape of kidney, you say that it is bean shaped. When it comes to shape of bean, you say, it is kidney shaped. Here you take the help of meter to define the speed of light and when it comes to length of meter, you take the help of speed of light.