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2005-2010 V6 Mustang Tech Forum

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Unread 05-01-2011   #1 (permalink)
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Default 2005 Mustang v6 Engine Wiring Diagram

I recently got a check engine light for my 2005 mustang v6 and i pulled the code and it was p0135. I changed both of the oxygen sensors and it still hasnt gone away. I thought that I could chase the wires back to see if the wire was torn anywhere. Long story short i couldnt find a wire diagram in my Chiltons book or on the internet and i was woundering if anybody has one or something.

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Unread 05-01-2011   #2 (permalink)
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There's four O2 sensors in these cars. Here's the relevant engine wiring diagram:

Ford Service Manuals - Wiring Diagrams
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Unread 05-01-2011   #3 (permalink)
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Thanks that exactly what i was looking for and i replaced the two upstream o2 sensors. I know it probably wont help but should i replace the two others?
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Unread 05-01-2011   #4 (permalink)
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Quote:
Originally Posted by Lil05Pony View Post
I recently got a check engine light for my 2005 mustang v6 and i pulled the code and it was p0135. I changed both of the oxygen sensors and it still hasnt gone away. I thought that I could chase the wires back to see if the wire was torn anywhere. Long story short i couldnt find a wire diagram in my Chiltons book or on the internet and i was woundering if anybody has one or something.

Thanks
welcome to the forums. i dont have a scanner hooked up so i tried to take a pic of the page, lets see if it works. nope, in order for it to be clear, it wont let my attach it here. if you pm me with your email, i`ll send it to you.
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Unread 05-01-2011   #5 (permalink)
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Quote:
Originally Posted by Lil05Pony View Post
Thanks that exactly what i was looking for and i replaced the two upstream o2 sensors. I know it probably wont help but should i replace the two others?
Don’t know what the heating element’s values are supposed to be, but if you’re handy with an ohmmeter measure the heating elements on all four of the O2 sensors while they’re at room temperature. If you notice one that’s significantly different than the others that may be your culprit. If those all look good start exploring the connectors and wire harnesses. Wouldn’t be the first time a wire harness/connector has caused problems in these cars.
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Unread 05-01-2011   #6 (permalink)
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They all checked out ok. I guess i will start checking all the connections. Thanks for the info
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Unread 05-02-2011   #7 (permalink)
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i`m just bumping this back up, maybe someone else will catch the issue. wording your post titles is key to getting answers alot of times. if you cant find the problem, maybe post "2005 mustang V6 problem with o2 sensor" or something to that effect.

alot of times when someone has a problem with the o2`s its from doing some other repair, crossing some wires or pinching a wire?
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