Sable Discuss the Mercury Sable here...

Locating which 02 sensor to change P0430 (see pic)

Old 03-25-2011, 01:34 PM
Junior Member
Thread Starter
Join Date: Nov 2009
Location: Seattle
Posts: 17
Default Locating which 02 sensor to change P0430 (see pic)

Hey all. 97 Mercury Sable. I've had this code for some time and have replaced plugs, wires, fule filter. All the cheap stuff so far. Moving on to the 02 sensor. There are 4. i would like to not change the wrong one. It's B2. Any ideas on the location? I know it's after the cats but not sure which one. Heres a pic of the code reader. Thanks.

Last edited by johnnyo; 03-25-2011 at 02:12 PM.
Old 03-25-2011, 10:33 PM
Join Date: Aug 2010
Posts: 91

I have so many times have told people to stop throwing parts at a problem in attempt to fix a trouble code. A code just means that the computer has found a sensor that is reading out of the normal operating range. It does not mean the sensor is bad. The 430 code means that the sensors in the right bank are not seeing much of a difference between the the inlet & outlet of the CAT. There could be many reasons why.

You would be money ahead by paying th $50-$60 to have it diagnosed. I no longer do auto repair, but many times I have fixed a computer problem by fixing a bad ground,or bad contact in the wiring harness plug connections.

You could have a bad sensor(s), but maybe not. There is no way that I or anybody else can tell on line.

I understand you want to save money (who doesn't), but unless you have the knowledge or proper equipment to do it, it is usually more profitable to pay someone. Many are penny wise, but pound foolish.

But this isn't the answer you want, & the O2 sensor is the in the right bank. I don't know which one it is, but if it doesn't work in one position, you can switch to the other. If neither position works, then you can probably rule the O2 sensor out as the problem.
Old 03-26-2011, 01:09 PM
Junior Member
Thread Starter
Join Date: Nov 2009
Location: Seattle
Posts: 17

Yeah the only parts I've thrown at it thus far have needed to be changed anyway. Plugs, Wires, Fuel Filter, 108000 mil. It was time. I'm having a friend test the TPS and other sensors to see if we can narrow it down. Another forums told me the cats are going. The $800 is what I'm trying to avoid. Thanks for the advice!
Related Topics
Thread Starter
Last Post
user 87
General Tech Help
12-28-2014 12:10 AM
11-16-2010 04:43 PM
09-28-2010 09:38 AM
03-17-2010 08:55 AM
Grand Marquis
06-29-2008 10:25 PM

Thread Tools
Search this Thread
Quick Reply: Locating which 02 sensor to change P0430 (see pic)

Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.