Oil pressure gauge malfunction?
Thread Starter
Advanced
Joined: Jul 2018
Posts: 51
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Oil pressure gauge malfunction?
When I start my C5 Z06, the oil pressure gauge (both dial and digital) start at around 30 psi then immediately goes to 160 psi. The gauge also goes to max (80psi) even when I turn the key without starting the car. Since the car seems to drive okay, is this a sensor, or wiring issue? One suggestion was that it might be the oil pump. Any suggestions on how to troubleshoot?
Thanks as always.
JBN
Thanks as always.
JBN
Racer
Joined: Jun 2021
Posts: 257
Likes: 75
When I start my C5 Z06, the oil pressure gauge (both dial and digital) start at around 30 psi then immediately goes to 160 psi. The gauge also goes to max (80psi) even when I turn the key without starting the car. Since the car seems to drive okay, is this a sensor, or wiring issue? One suggestion was that it might be the oil pump. Any suggestions on how to troubleshoot?
Thanks as always.
JBN
Thanks as always.
JBN
Once you get it out, you're going to have to take your multi-meter to it and check its resistance. Out of the car it should measure around 240-250 ohms. At 40-80 psi (normal operating range) it should have been reading between 180 and 30 ohms. If it reads less than about 200 out of the car, I would tend to think it is shot. But since you are going to all the trouble to get it out, I would just replace it. They aren't very expensive, and if it isn't bad, at some point it will be since this is a very common issue. I'd just replace it.
-D
Safety Car
Joined: Sep 2000
Posts: 3,572
Likes: 420
From: Taildragers rule! USA1
Best just to remove the intake manifold.
When you replace the sensor be sure to replace the Secondary Air Injection Check Valve.
https://www.ebay.com/itm/13268680110...Bk9SR5rNyOebYg
When you replace the sensor be sure to replace the Secondary Air Injection Check Valve.
https://www.ebay.com/itm/13268680110...Bk9SR5rNyOebYg
Melting Slicks
Joined: Sep 2008
Posts: 3,138
Likes: 802
From: Espanola New Mexico
It's the sensor, if you pull the intake manifold to replace, add a small length of rubber tubing to extend the small vacuum line that connects from the intake manifold to the hvac controls.
Thread Starter
Advanced
Joined: Jul 2018
Posts: 51
Likes: 1
D,
How do you install the little filter that comes with the oil pressure sensor? I noticed that there wasn't one in there when I pulled the sensor, but the OEM sensor comes with a little filter and I wasn't able to get it down the hole.
THX
How do you install the little filter that comes with the oil pressure sensor? I noticed that there wasn't one in there when I pulled the sensor, but the OEM sensor comes with a little filter and I wasn't able to get it down the hole.
THX
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