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The Terminator
Terminator Talk
o2 sensor help please
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<blockquote data-quote="TVSCobra" data-source="post: 9695729" data-attributes="member: 64473"><p>The oxygen sensor indicating rich at the end of a test is trying to correct for an over-lean condition. This code is indicating that the PCM is adding fuel. There are parameters set in the PCM for adaptation, it is constantly making small adjustments to fuel trim. If it keeps adding or taking away fuel and begins to get out of range it will through the check engine light. There are many things that can cause these codes. In your case I would check for a vacuum leak, bad/dirty mass air sensor, or a fuel related issue. How does the car perform otherwise? Has there been any work done lately on the car? You could also have an exhaust leak before the pre-cat o2 sensors. Since you also have P0148, you could also have a clogged fuel filter. Give me more information on the car.</p></blockquote><p></p>
[QUOTE="TVSCobra, post: 9695729, member: 64473"] The oxygen sensor indicating rich at the end of a test is trying to correct for an over-lean condition. This code is indicating that the PCM is adding fuel. There are parameters set in the PCM for adaptation, it is constantly making small adjustments to fuel trim. If it keeps adding or taking away fuel and begins to get out of range it will through the check engine light. There are many things that can cause these codes. In your case I would check for a vacuum leak, bad/dirty mass air sensor, or a fuel related issue. How does the car perform otherwise? Has there been any work done lately on the car? You could also have an exhaust leak before the pre-cat o2 sensors. Since you also have P0148, you could also have a clogged fuel filter. Give me more information on the car. [/QUOTE]
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o2 sensor help please
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