You are here:

Chrysler Repair/O2 senser, Bank 1

Advertisement

Expert: - 9/20/2011


Question
I have replaced my bank 1 o2 sensor 2 times now. Each time the check engine light has been reset it comes back on with-in 24 hours and reads bank 1 sensor. This is driving me crazy. Please can you give me some suggestions on what the problem may be and how to fix it? I am trying to pass my states emissions.

Answer
Hi Dianna,
It is likely that the connection of one of the four wires to the sensor is flakey. Let me know the year/model/engine size and I can tell you how to check the connection between each wire and the engine controller main plug. It takes a continuity tester or a volt-ohm meter to check that. If you have paid someone for the job they should have done this in the first place, so they should do this troubleshoot and repair of the wire for free. If there are two sensors for the bank, the other issue would be is the upstream or the downstream sensor that the code is pointing at as you may have not replaced the correct sensor. What was the code number?
Roland

Chrysler Repair

All Answers

Answers by Expert:

Ask Experts

Volunteer

Roland Finston

Expertise

I specialize in Chrysler/Dodge/Plymouth cars, minivans, and SUV's for the model years 1982-2008 based upon my 50-year DIY experience, factory shop manuals and wiring diagrams. I offer fast repair advice to help you minimize repair costs by helping you diagnose and do it yourself. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty.

I take questions one at a time between 8am and 10pm CT and attempt to answer within 20 minutes. "Maxed Out" means I am answering another question of otherwise busy, so try again later.

There are answers on file to more than sixteen thousand Chrysler questions at your finger tips: put a few key words in the "find" box (above) or click on "view past answers" for a chronological list of my q and a's. Don't use "Add to this answer" if you still have a question...ask it. As to trucks and jeeps I only have manuals for the '04-'06 model years.

Experience

Five decades as a 'do-it-yourselfer' on domestic and imported cars

Organizations
Yahoo Autos Group called The Chrysler Lebaron Club (co-moderator)

Education/Credentials
Degrees in Physics/bruised knuckles.

Awards and Honors
"Top expert of 2010" and "2011" at Allexperts. Among top 50 experts for years 2006-2009 at Allexperts.

Quickest "average response time" at Allexperts (currently no. 1).

©2012 About.com, a part of The New York Times Company. All rights reserved.