Find Discount Auto Parts By Vehicle
Find Discount Auto Parts By Parts Number

Norton Secured - Powered by VeriSign Bill Me Later - a PayPal Service PayPal MasterCard Visa Discover

Read What Our Customers Are Saying...

I found your company first on eBay then I bought parts directly from your site. I probably wouldn't have a running car if not for Prime Choice! I couldn't afford everything to fix the suspension from any other place but your prices are so amazing. Thank you,

Rielle Wright

I just wanted to compliment your company on great service, communication, shipping and products. The purchase I made just recently arrived lightning quick. I was surprised because I placed the order almost too late to give you a chance to get it here when I needed it. But the order made it. I also worked with a couple of your folks on an ordering problem and they were very helpful. I will definitely try to call on you again for future orders. Thanks a lot,

Marty Lawson
Harrodsburg KY.

Hi. Thank you for your refund, your professionalism and fast response. I am very satisfied. I plan on purchasing new wipers for both my vehicles and will plan on getting them from you. Also if your product is as good as they look I will inform my associates I work with - 250+ of your product. Thank you again and I look forward to dealing with you in the near future. Sincerely,

Paul Horniak

I ordered two sensors for my car. You sent me a confirmation and let me know that it had shipped. I PAID NO SHIPPING. You are the best. I am 59 and I appreciate the way you do business. To be a good customer should I tell everyone about you or just spend lots of money? Danny C. Graybeal

Half the price of anyone else. Very good quality parts and the how-to videos really helped. It took me about an hour to replace both front struts. Thanks and Regards,

Jack
Farmersville, Ohio

Thanks so much for the awesome service – WOW - I will be putting the parts on tonight – WOW Thanks so much,

James F,
Chicago, Ill

Strut Assembly and Brakes. Well you are right - half the price, good quality and excellent service. You were so inexpensive I was suspicious. Everyone told me don't do it - go local. Well they are the loser and I am so thrilled. The job went well and I saved over 500 dollars. Thanks!! I am spreading the word. A Grandmother with guts,

Sue R
Berlin, MA

Thanks for the great service! The parts arrived as promised and fit like a glove (also as promised). The instructions that were included made it relatively easy for me to do the work myself. That saved me over $300 on labor. Unfortunately my regular mechanic believes only KYB makes shocks and struts! I would recommend you to anyone and have! Thanks, again! It's been a pleasure doing business with you!

Wil G,
Bedford TX

I ordered parts yesterday and got them this morning. Installed them and just need the rear bearings now. Jesse Chard

I am glad I found you on the internet. Your parts are so cheap (only in price).Thanks for the good service, fast delivery and free shipping. When I need any parts I will order from you and also tell others about you. (Family members etc.) Thanks,

Charles Ellis

This is a great online parts store. I have ordered parts for 3 different vehicles and every parts was right on and the quality and price are second to none. The service is better than most local stores. PRIME CHOICE IS MY CHOICE for all of the parts they can supply me.

Kevin Donais

got an excellent deal on rotors and brake pads thank you!!!

Chuck Derby

Thanks!!!!!!!!

Awesome transaction: simple, swift, and exact item needed to solve my problem.

Look forward to future transactions.

L. Garrett
Satisfied Customer

Secure Checkout (24/7)
Shipping
International Shipping
Sign Up For Exclusive Deals

Oxygen Sensor | O2 Sensor

Vehicles with computerized engine control systems rely on data from several sensors to maintain optimal engine performance, emissions and other important functionality. The sensors must provide accurate information, or the vehicle can experience drivability issues, increased fuel consumption and emission failures.


One of the primary sensors in this somewhat complicated system is the Oxygen Sensor. It is often referred to the O2 Sensor or the Lambda Sensor, which is its technical name.


Although oxygen sensors were first used in 1976, the state of California introduced legislation in 1980 that toughened emission rules, and this spurred the growth in O2 sensor usage. In 1981, federal emission laws made oxygen sensors virtually mandatory on all cars and light trucks. Today’s vehicles are now subject to more stringent OBD-II regulations, and many vehicles are now equipped with multiple oxygen sensors – some with as many as four!


The sensor is typically mounted in the exhaust manifold, and it monitors how much unburned oxygen is in the exhaust as it exits the engine. Monitoring oxygen levels in the exhaust is a way of gauging the fuel mixture. It tells the computer if the fuel mixture is burning rich (less oxygen) or lean (more oxygen). The engine then adjusts automatically to run at peak performance.


A lot of factors can affect the relative richness or leanness of the fuel mixture, including air temperature, engine coolant temperature, barometric pressure, throttle position, air flow and engine load. There are other sensors to monitor these factors too, but the oxygen sensor is the primary monitor for what happens with the fuel mixture. Consequently, any problems with this sensor can cause problems for the entire fuel system.


Fuel Mixture Feedback Control Loop


Your vehicle’s on-board computer uses the oxygen sensor input to regulate the fuel mixture; this process is referred to as the fuel "feedback control loop." The computer takes its cues from the sensor and responds by modifying the fuel mixture to an ideal level. This generates a corresponding change in the sensor reading. This is referred to as "closed loop" operation because the computer is using the oxygen sensor’s input to normalize the fuel mixture. The result is a constant flip-flop, back and forth from rich to lean, which allows the catalytic converter to operate at peak efficiency while keeping the average overall fuel mixture in proper balance to minimize emissions.


If no signal is received from the sensor, as would be the case when a cold engine is first started (or the sensor fails), the computer orders a fixed (unchanging) rich fuel mix


Tweet Prime Choice Discount Auto Parts
Facebook Prime Choice Discount Auto Parts
Blog Prime Choice Discount Auto Parts
Google Prime Choice Discount Auto Parts