Skip the auto shop - Our mechanics make house calls

Q: Does my vehicle have an oil pressure sender or oil pressure sensor or both and where is it located?

asked by on

When truck gets to operating temp the oil pressure drops to 0-10 but jumps back to 40-60 while driving. There is no knocking or ticking and the oil level is good. My research points to the oil pressure sending unit or sensor. I would like to do the work myself but I do not have a pressure guage to check the pressure manually. I figured that I might replace one or both of the parts previously mentioned and if I can't track the problem then I will have to take it to a mechanic.

My car has 175000 miles.
My car has an automatic transmission.

Your motor (454/7.4L Big Block Chevy) should have an oil pressure sending unit that is typically mounted just above the oil filter housing. This is a relatively small unit (about the diameter or a quarter or slightly bigger) with threads going into the engine block and a line coming out of the other side of the unit. Your oil pressure fluctuation sounds like this may be a case of a failing sending unit. If you are not able to replace this on your own, feel free to schedule an appointment with one of our expert mechanics here at YourMechanic to come to your location to replace your oil pressure sending unit.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  • Home
  • Questions
  • Does my vehicle have an oil pressure sender or oil pressure sensor or both and where is it located?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Cylinder Head inspection

I would recommend pulling the cylinder heads off to inspect considering 2 of the push rods broke. This may have caused material from the broken rods to be scattered throughout the valve train or potentially other places in the motor....

Q: gera oil quntity

Hello, here is information you requested and a little bit more Thank You Manual Transmission - 1.8L /1.9qt Manual Transmission Manual Transmission Fluid (GM Part No. 89021806, in Canada 89021807). Engine Engine code Year Which Use How much 1.4 F14D4...

Q: Transmission engine comparability

Hey there. As long as the engine you have currently bolted to the 700R4 is NOT a 4 cyl or V6, it should bolt up to the TH400. TH350s, TH400s (except those in a Jeep), and 700R4s (except as noted...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.