Stumped ... too much information, and not enough knowledge or experience! I got a P1133 error code on my Yukon XL, so one of the FOUR O2 sensors is bad. Two one each bank, and one b4 and after the cat. So, which side is which? And why are these $71? Anyone with experience would be appreciated.
The O2 sensors are heated which makes them more expensive. Don't complain. Some are a hundred bucks more. Check the connections to the four O2 sensors first to make certain they are not corroded. There is no way to tell which sensor is bad by the code. You need a scan tool to monitor the individual voltages to know which is bad. This falls into the category of take it to the dealer which may not be a bad idea. The O2 sensors are covered under warranty. My Vette, a 2003 Z06 just had one of the catalytic converters replaced under warranty. Warranty on emissions for 2003 year cars is 8 years from delivery or 80,000 miles. It doesn't matter if you are the original owner or not, it is still covered. Newer model cars are covered for ten years or 100,000 miles. I don't recall the year the length of warranty changed. Steve
$71 is cheap, they can run $300 on a Ferrari. So a Google search (which you should have done ) says this: P1133 Heated Oxygen Sensor (HO2S) insufficient switching bank 1 sensor 1 So that means it is the pre-cat sensor (first one off the engine) on bank 1. Bank 1 is always the side with cylinder 1. Good luck.
Not on emissions warranty stuff, that is regulated by the Feds, unless the federal rules changed... http://www.epa.gov/obd/warranties.htm
Huge- That is correct. In 2008 GM went to a 100,000 mile, 5 year warranty for the major engine, transmission, and driveline parts. Since most people get nowhere near 100,000 miles in 5 years, it is more of a marketing tool than anything else, and inferior to Chrysler's 7 year, 70,000 mile drivetrain warranty. Emissions warranty is unaffected. Taz Terry Phillips
hmm. Well, I changed that one a few months ago (thinking the same thing) and then got the code back. So I took the part back (1 yr warranty) and then the code come up again. Maybe I'll swap the pre and post and see if the code changes. Maybe I got two bad ones// also the car is a 2001 with 108K so no warr.
Rick- Way to go with 108K on your car. The change interval on the O2/lambda sensors is 90K on my car, so maybe you are due to change them all. Taz Terry Phillips
