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 Urgent! Catalytic Converter, Catalytic Converter (replace or repair?)
 
mikeymandap
post Feb 26 2005, 08:19 PM
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:) Hi! I have a 1999 Mitsubsihi Montero (Shogun/Pajero) Full size. My check engine light turned on and was diagnosed to be "LOW TRESHOLD DURING WARM UP" from the catalytic converter. Should I replace or have it fixed? how much? <y mechanis said it would cost me $1800.00 PLEASE HELP I NEED ANSWERS. THANKS!
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vedran071
post Apr 25 2008, 10:17 AM
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HI

I just joint in, i had a same problem , the DTC code was warm up catalyst below threeshold , i changed front o2 sensor and it does not show me that any more.
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manybrews
post Apr 26 2008, 05:48 PM
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your mechanics answer was completely correct. the only way to repair that is to replace the catalytic converter.
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Benckj
post Apr 27 2008, 06:35 PM
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The reading may be due to a faulty O2 sensor which if has a heater in it (4 wire type) will give a faulty reading. They are not that expaensive especially if you go with an aftermarket type ($70). If you go this way you will probably have to splice in the existing plug.

It is a different senerio if the Cat has failed and needs replacement. Weather you repair or replace (inc complete removal) depends on the emission controls you have in your location. Many other owners have decided to remove the Cat completely and start running a different fuel, such as ethanol to reduce exhaust emissions. This has several performance advantages but you must know what you are doing and if it is the right choice for you.

Jim
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manybrews
post Apr 28 2008, 06:50 AM
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a failed heater in an O2 sensor has its own code... and even if it didnt, you would get a code for the O2 sensor being inactive.

im afraid that "failed cat." codes are incredibly accurate.
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