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SportTrac Discussion
Engine & Drivetrain
Aloha: Check Engine Codes O2...
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<blockquote data-quote="DAM Sport Trac" data-source="post: 1051234" data-attributes="member: 76293"><p>My response is based on the assertion that aforementioned mechanic has verified the 12v reference (koeo) at each O2 heater circuit wire and that the wires are good and not melted to the exhaust. </p><p>Having that many codes at once all dealing with the same system (emissions controls) is screaming electrical/ecu issue. First place I would look is the multi wire harness connector near the throttle body for damage. Heat and age can cause the wire insulation to deteriorate and allow for a short to ground which can also result in damaging circuits in the computer. Also check the ecu/pcm connections for water or poor connection. </p><p>The code to address first is the P0135. </p><p></p><p>My gut/experience is telling me that the ecu/pcm is the issue but always verify poor harness connection and wiring damage first.</p></blockquote><p></p>
[QUOTE="DAM Sport Trac, post: 1051234, member: 76293"] My response is based on the assertion that aforementioned mechanic has verified the 12v reference (koeo) at each O2 heater circuit wire and that the wires are good and not melted to the exhaust. Having that many codes at once all dealing with the same system (emissions controls) is screaming electrical/ecu issue. First place I would look is the multi wire harness connector near the throttle body for damage. Heat and age can cause the wire insulation to deteriorate and allow for a short to ground which can also result in damaging circuits in the computer. Also check the ecu/pcm connections for water or poor connection. The code to address first is the P0135. My gut/experience is telling me that the ecu/pcm is the issue but always verify poor harness connection and wiring damage first. [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
Aloha: Check Engine Codes O2...
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