P0133 Oxygen Sensor Circuit Slow Response Bank 1 Sensor 1
An Oxygen sensor must switch constantly between .27 and .62 volts. The engine computer waits until the engine has reached at least 145 degrees and the vehicle has driven at least 10MPH for 30 seconds before it starts looking at the switching rate. The computer looks for about 8 voltage changes per second (these are called CROSS COUNTS). If it sees less than that, it sets this code, telling you that you have a “lazy sensor.”
Oxygen sensors wear out between 80,000-100,000 miles. But they can also be damaged by coolant, silicone, and engine misfires. If you have this code, chances are your Oxygen sensor needs to be replaced.
Bank 1 denotes the #1 spark plug side of the engine. Sensor 1 refers to the sensor BEFORE the catalytic converter.
For more information on this repair or any others for your vehicle, buy an online subscription to either Alldatadiy.com or eautorepair.net. Click on this link to compare the two services: Compare Alldata and Eautorepair.
If you just need information for a single repair and want to save money,eautorepair offers a lower price 1-week subscription for only $11.99. Or, if you’ll be working on this vehicle in the future, you can buy a 1-year subscription (Alldatadiy.com for $26.99, or eautorepair.net $29.99)
© 2012 Rick Muscoplat
Alldatadiy.com
eautorepair.net
Alldata and Eautorepair are both professional grade shop manuals. You’ll find more in-depth information and more complete wiring diagrams, along with descriptions of how the systems work. And, you’ll get all that at a price you can afford. Check them out!
Click HERE to read AUTO REPAIR ARTICLES sorted by topic
Click HERE to read some cool DIAGNOSTIC TIPS
Click HERE to read ACURA articles
Click HERE to read AUDI articles
Click HERE to read BMW articles
Click HERE to read CHRYSLER articles
Click HERE to read DODGE articles
Click HERE to read FORD LINCOLN MERCURY articles
Click HERE to read GM articles
Click HERE to read HONDA articles
Click HERE to read HYUNDAI articles
Click HERE to read INFINITI articles
Click HERE to read JEEP articles
Click HERE to read KIA articles
Click HERE to read MITSUBISHI articles
Click HERE to read NISSAN articles
Click HERE to read SUBURU articles
Click HERE to read TOYOTA articles
Click HERE to read VOLKSWAGEN articles
Hey Rick, I’ve had this code going in my car for at least 6 months now. I’ve replaced the oxygen sensor 2 times and had my local mechanic change it as well and the blasted light still came back on with the code PO133. Could some thing else be causing the code and how could I find that problem?
Can’t help without year, make, model, and engine.
If you provide the year, make, model, and engine, I can see how it’s wired and also check a few pattern failure databases.