PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Can Old Gas Cause A Knock Sensor Code

Thread Tools
 
Search this Thread
 
Old Aug 2, 2013 | 11:14 PM
  #1  
Sinister_Z28's Avatar
Thread Starter
TECH Regular
 
Joined: Dec 2012
Posts: 414
Likes: 0
From: San Diego
Default Can Old Gas Cause A Knock Sensor Code

OK so my car has been sitting for like 2 1/2-3 months and i didnt start it or drive it cause i was waiting on parts. Now i got all the parts in and on so i went and took it around the block. The highest RPMs the car went was like 3700. So when i got home i saw i had a SES light and i got my scanner and it said both knock sensors had low voltage so could bad gas cause this?
Reply
Old Aug 2, 2013 | 11:40 PM
  #2  
Zlow28's Avatar
TECH Addict
iTrader: (11)
 
Joined: Apr 2010
Posts: 2,080
Likes: 1
Default

Its possible, but i dont think 3 month old gas would cause knock sensors to go bad. Swap in some new gas and reset the pcm to see what happens
Reply
Old Aug 3, 2013 | 01:06 AM
  #3  
salemetro's Avatar
TECH Fanatic
iTrader: (5)
 
Joined: Sep 2008
Posts: 1,120
Likes: 0
From: Salem/Keizer
Default

Bad gas will not cause a low voltage reading. Gasoline never even comes in contact with the sensors.

My guess is a corroded ground or harness pigtail.
Reply
Old Aug 3, 2013 | 08:36 PM
  #4  
Sinister_Z28's Avatar
Thread Starter
TECH Regular
 
Joined: Dec 2012
Posts: 414
Likes: 0
From: San Diego
Default

So what exactly does a low voltage knock sensor code mean. Does it mean the knock sensors dont have enough voltage to operate. Or does it mean i might have have some engine knock. I believe my plugs are to hot. Im running stock plugs from auto zone. Didnt even think about it until now and my static compression is 11.2:1. What plugs should i be running. Also i cleared the code and let it idle for like 10 minutes and i didn't get any codes. Ive been meaning to ask. Why do i sometimes get a code without the SES light coming on?
Reply
Old Aug 18, 2013 | 11:38 PM
  #5  
blackbirdls1's Avatar
TECH Enthusiast
15 Year Member
Photogenic
iTrader: (5)
 
Joined: Jan 2006
Posts: 682
Likes: 4
From: Oviedo, FL
Default

Man check those sensors, hell even replace them if you get to, I just had taken apart my manifold and replaced some sensors, but didn't think to do the knock sensors even though they are fine, and they weren't in my budget but after all the work of taking everything out its something you should do if you can.
Reply




All times are GMT -5. The time now is 04:11 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-5
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-6
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-7
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-8
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-9
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE