P0171 & p0174. O2 sensor spacers or timing belt? - Club4G Forum : Mitsubishi Eclipse 4G Forums - 2006-2012 Eclipse Authority
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Old March 25th, 2013, 03:38 PM   #1 (permalink)
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P0171 & p0174. O2 sensor spacers or timing belt?

Ok so I put spacers on both bottom o2 sensors bc I was throwing a code for my catalytic converter. It's completely stock. The spacers have been working for 2 months. Until yesterday. No codes. I got my timing belt replaced about a month ago and when I got the car back it kinda ran a little rougher and vibrates more than before.
My question is would the spacers cause the car to run to lean? Or is it more likely they messed up during the timing belt replacement?

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Old March 25th, 2013, 04:14 PM   #2 (permalink)
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The day before it came on my girlfriend ran it until the gas light came on.. Could this be the problem? Car has 107,000 miles on it 2.4 2006
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Old March 25th, 2013, 04:25 PM   #3 (permalink)
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Its the spacers. My question is why run 02 spacers when car is completely stock? You really only need those if you have headers
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Old March 25th, 2013, 05:17 PM   #4 (permalink)
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Its the spacers. My question is why run 02 spacers when car is completely stock? You really only need those if you have headers
I had a p0421 and p0431 code. And people on here said to do it. It solved the code. But now I have these different codes. Would it be better for the car to take the spacers off and just deal with the original Warm Up Catalyst Efficiency Below Threshold codes? Isn't running lean really bad for the car? What route should I take for the p0421 & p0431 codes?
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Old March 25th, 2013, 05:30 PM   #5 (permalink)
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Quote:
Originally Posted by Zsnow_92 View Post
I had a p0421 and p0431 code. And people on here said to do it. It solved the code. But now I have these different codes. Would it be better for the car to take the spacers off and just deal with the original Warm Up Catalyst Efficiency Below Threshold codes? Isn't running lean really bad for the car? What route should I take for the p0421 & p0431 codes?
Id say its better to run the po421-31 and all that is is the sensors getting to much air and making the catalytic converter warm up quicker than normal. But the other codes are running lean and you don't want to do that so just take off the spacers and don't worry about the other codes bc they aren't effecting the car that much man
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Old March 25th, 2013, 07:05 PM   #6 (permalink)
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Originally Posted by derek-g View Post
Id say its better to run the po421-31 and all that is is the sensors getting to much air and making the catalytic converter warm up quicker than normal. But the other codes are running lean and you don't want to do that so just take off the spacers and don't worry about the other codes bc they aren't effecting the car that much man
Thank you!!
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Old March 26th, 2013, 07:18 AM   #7 (permalink)
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A very common problem with the Eclipse is O2 sensors dying. That's the first place I'd be looking. Also, make sure all your maintenance items are up to date. If the sparkplugs and such are severely worn it can sometimes cause weird codes to pop up (although more often you get the p030X codes for misfires.

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back, belt, car, catalytic, code, codes, converter, lean, o2 sensor, question, replacement, sensor, sensors, spacers, stock, stock., timing

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