Quantcast What Are Symptoms of a Bad Oxygen Sensor - Ford Truck Club Forum
FTC Toolbar Tech Archives Entertainment Social Sites Current Advertisers Advertise With Us Vote Donate
Go Back   Ford Truck Club Forum > GARAGE TALK > Garage Talk: Shop Class 101
  Dear Guest, you can now use your Facebook account to securely log into this site, click the icon to connect!   
Register Privacy Policy Home Forum Blog Gallery Garage

Garage Talk: Shop Class 101
This is the place to post technical articles and completed projects. Please make sure they are complete, check for typos and host all images in the FTC gallery located Here. If you need help, please ask the staff.

Be sure to also check out our complete Tech Archives.


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools Display Modes
Old August 26th, 2011, 05:07 PM
JSoko's Avatar
JSoko JSoko is offline


Join Date: Jun 2009
Location: Northwest Georgia
Posts: 12,726
Images: 576
Likes : 22
Liked 115 Times in 97 Posts
Lightbulb What Are Symptoms of a Bad Oxygen Sensor

What Are Symptoms of a Bad Oxygen Sensor?

An oxygen sensor gone bad impacts your car's engine performance. A bad oxygen sensor can negatively impact an engine's performance in a variety of ways. Because of the important role an oxygen sensor plays in the maintenance of proper air and fuel levels in a running engine, any abnormal or faulty oxygen sensor function can create several abnormal engine symptoms.

Poor Gas Mileage
Oxygen sensors play a huge role in adjusting a vehicle engine's air/fuel ratio, the combination of gas and air an engine burns to produce power. A faulty oxygen sensor may allow too much fuel to be added to the air/fuel ratio, resulting in poor gas mileage.

Increased Vehicle Emissions
Oxygen sensors monitor and adjust an engine's air/fuel mixture to ensure proper engine combustion, vehicle emissions and performance. A bad oxygen sensor can result in poor air/fuel mixtures or lean or rich fuel-injection delivery, all of which can cause improper or inefficient engine combustion and increased vehicle emissions.

Rough Engine Idle
Proper engine combustion is crucial for maximizing engine performance. A bad oxygen sensor can cause a car's engine to idle in a choppy, rough manner. This is caused by the less-than-optimum engine combustion firings that result in poor engine performance.

Engine Missing
If a bad oxygen sensor causes an engine's air/fuel mixture to become too lean or restricted, the explosions within an engine's cylinders (engine combustion) will be altered. Normally, an air/fuel mixture that is too lean (too much air, not enough fuel) will cause an engine to miss, or misfire, especially when an engine is idling.

Engine Hesitation
Engine hesitation is similar to engine missing. However, engine hesitation is experienced only during acceleration, while an engine miss can be experienced both during engine acceleration and idle. A bad oxygen sensor may misread or misinterpret an engine's air/fuel mixture or air/fuel requirements and cause too little or too much air and/or fuel to enter an engine's cylinders, especially during acceleration. This can cause an engine to hesitate, or stumble

More than likely the Check Engine Light will come on
and remember many local Auto Parts Stores will check your codes for FREE

For Those Who Fought For It...
Freedom Has A Taste The Protected Will Never Know.

Reply With QuoteReplyShare with FacebookEmail this PageLike This Post

« How To Diagnose a bad Mass Airflow Sensor | How To Clean Oil Off Your Driveway »

bad , oxygen , sensor , symptoms

Thread Tools
Display Modes

Forum Jump

(View-All Members who have read this thread : 10
87F150Jess , 95Fifty150 , GunSlingR69 , j641350 , JSoko , mucklife13 , Red91 , Redbird , Russo2 , Ted Driver

Similar Threads
Thread Thread Starter Forum Replies Last Post
How To Diagnose a bad Mass Airflow Sensor JSoko Garage Talk: Shop Class 101 0 August 26th, 2011 05:00 PM
How to Test a Manifold's Absolute Pressure Map Sensor JSoko Garage Talk: Shop Class 101 0 July 15th, 2011 09:19 AM
Jet Mass Air Sensor Bates88 Garage Talk: Engine & Drivetrain 1 July 5th, 2010 08:45 AM
Testing a Ford 5.0L throttle position sensor BADSHOE BADSHOE Productions 0 March 14th, 2010 06:07 PM
Testing a 5.0L Ford Throttle Position Sensor Video BADSHOE BADSHOE Productions 1 January 5th, 2010 04:42 PM

FordTruckClub.net is not authorized, endorsed or affiliated with the Ford Motor Company
or any of their subsidiaries. Ford® is a registered trademark of the Ford Motor Company

Powered by vBulletin® Version 3.8.6 Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.