Engine Bay Sensors
Thread Starter
Heel & Toe
Joined: Feb 2019
Posts: 16
Likes: 0
From: Ohio
Engine Bay Sensors
I was just replacing the oil pressure switch in my 99’ Vette. I noticed behind the intake manifold on the passenger side there was a wire that wasn’t plugged in. I have no idea what it is or does, but I had no problems driving the car beforehand. It’s almost in the center of the intake manifold, but slightly to the left and you can’t see it unless you’re really looking for it. Does anyone have any clue what it is?
Thread Starter
Heel & Toe
Joined: Feb 2019
Posts: 16
Likes: 0
From: Ohio
I’m out of town, but I will take a picture tonight or tomorrow when I get home.
The pig tail was blue if I remember correctly. I don’t remember the wire color. I’ll know when I get home and post the picture of it
The pig tail was blue if I remember correctly. I don’t remember the wire color. I’ll know when I get home and post the picture of it
Thread Starter
Heel & Toe
Joined: Feb 2019
Posts: 16
Likes: 0
From: Ohio
Just got back home. The engine bay is wet a little only cause it’s sprinkling right now. The pictures aren’t great as well cause it’s dark, but I might be able to get better ones in the light
Acct Suspended APR 2026 by request
Joined: Dec 2010
Posts: 10,367
Likes: 1,272
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
map sensor... are you positive it's not plugged in?
Last edited by StingrayRebel; Feb 20, 2019 at 10:37 PM.
Thread Starter
Heel & Toe
Joined: Feb 2019
Posts: 16
Likes: 0
From: Ohio
I’m absolutely positive it wasn’t plugged in 2 days ago when I was changing the oil pressure switch. I’ve owned it for over a year and had absolutely no issues with how the engine was running. Plugged it in and my check engine light came on. There’s a chance I unplugged it while moving some things out of the way for the oil pressure switch, but I’m thinking that’s unlikely
Acct Suspended APR 2026 by request
Joined: Dec 2010
Posts: 10,367
Likes: 1,272
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
well if the intake came off to replace the opsu then you would have to unplug the map sensor since it's seated in the intake... leave it plugged in and clear all the codes, if they come back then maybe something needs to be addressed
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Thread Starter
Heel & Toe
Joined: Feb 2019
Posts: 16
Likes: 0
From: Ohio
I definitely did not take the intake off. I worked around it. Seemed like too much of a hassle for something so small. Anyways, yeah I’ll try clearing the codes and seeing what happens. It will be a while though cause it’s still too crappy outside for me to want to drive it and next week I’m installing a cam. If the problem persists I’ll definitely seek your advice. Thank you!