O2 sensor ground on 2003 D2 / 4.6
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Rock Crawling
Joined: Apr 2017
Posts: 326
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From: Macon, GA.
O2 sensor ground on 2003 D2 / 4.6
I looked by search for the thread where someone stated that the upstream O2 sensors sometimes lose ground back to the ECM. IIRC, the red and black wire.
While I am putting my engine back in and since I previously had two (upstream) O2 sensors that were not showing any reading on my live data stream, I wanted to add some small pigtails to the harness for testing after I get the truck running.
Can anyone verify the wire color is right?
While I am putting my engine back in and since I previously had two (upstream) O2 sensors that were not showing any reading on my live data stream, I wanted to add some small pigtails to the harness for testing after I get the truck running.
Can anyone verify the wire color is right?
Last edited by Davis31052; Dec 27, 2017 at 08:54 PM.
are the rest of the pin outs and more info than you need. Go NUTZ! 
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