2.4L LE5 Performance Tech 16 valve 171 hp EcoTec with 163 lb-ft of torque

Oxygen Sensor

Old May 24, 2007 | 06:27 PM
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Oxygen Sensor

does the 2.4L have 2 oxygen sensors or is it just the one. im installing the XTC dp tommorow and want to know if im in for a surprise. thats why im asking if theres more than one. today i had to go out and get a oxygen sensor wrench. it was only like $15. help would be appreciated.
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Old May 24, 2007 | 06:31 PM
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Originally Posted by cobaltssTH
does the 2.4L have 2 oxygen sensors or is it just the one. im installing the XTC dp tommorow and want to know if im in for a surprise. thats why im asking if theres more than one. today i had to go out and get a oxygen sensor wrench. it was only like $15. help would be appreciated.
Fairly certain I remember 2.
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Old May 24, 2007 | 06:34 PM
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1 HO2S in the exhaust manifold and 1 HO2S after the catalytic converter = 2
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Old May 24, 2007 | 07:00 PM
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so if im just replacing my dp ill only run into 1?
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Old May 24, 2007 | 09:03 PM
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yep only 1 with the dp others in the manifold
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Old May 25, 2007 | 10:55 AM
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Originally Posted by cobaltssTH
does the 2.4L have 2 oxygen sensors or is it just the one. im installing the XTC dp tommorow and want to know if im in for a surprise. thats why im asking if theres more than one. today i had to go out and get a oxygen sensor wrench. it was only like $15. help would be appreciated.
well i can tell you exactly what you need. theres an O2 sensor at the collector of the header and an O2 sensor just after the downpipe. and when i changed my exhaust it was easy just dont break them or rip the wires out cuz there expensive for new ones. well all you need to get them out is a 22MM WRENCH thats it.

ryan.
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Old May 25, 2007 | 10:59 AM
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but im only replacing the downpipe. so i will only need to remove 1
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Old May 25, 2007 | 11:13 AM
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yes but you still need a 22mm wrench to losen the 02 and tighten it back up.

ryan. make sure you use the new gaskets too.
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Old May 25, 2007 | 11:15 AM
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as posted before i purchased a special 02 sensor wrench. that is specifically what its for.
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Old May 25, 2007 | 10:49 PM
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ok so i bought the 02 sensor wrench and it will still not loosen. it did nothing but round off the blt. not good at all. what should i do
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Old May 26, 2007 | 12:11 AM
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well is the stupid tool a socket or a wrench or something from the dealer. like i said find a 22mm wrench and you wont round off the damn thing. and if all the flats on the nut are rounded then i think you need a new o2 then lol.

ryan.
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Old May 26, 2007 | 11:13 AM
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i tried the 22mm wrench. it wouldnt budge it. nor did it round it off. i bought the special o2 socket and that did nothing but round it off.
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Old May 26, 2007 | 04:17 PM
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take it to the dealer then so its warrented.

ryan.
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