o2 sensor problem
i have a 06 sv6 and i put pacmaker headers on a while ago and about a week after i got a check power train error finaly got around to buy a obd plug and got the error codes and they were two o2 sensor low voltage codes did a bit of searching around and realised that the cat pipes that i got with the headers had the 02 plugs welded in in front of the cats so i have 2 on the headers and two more beore the cats...
this is where i need the advise... will the error be because the sensors are busted or because they are before the cat and are ment to be after it.. also they are quite dirty if i clean them will this make it go away or wll i have to get new ones or will i have to get the sensors relocated?.. i can clear the codes with my tool to check if it fixed but dose anyone have any ideas and also if i replace them will they just brake again because they r in the wrong spot
Exhaust Guru
One problem could be that they are in front of the cats instead of behind them. But I would say the main issue is contamination. New headers will contaminate the sensors as the coating burns off. Did you get aftermarket cats fitted too or were the originals moved back after the headers?
Alloytec Racing
i thought the Alloytecs had 4 o2 sensors, both before and after cats?
Life starts at 200km/h
they were used so i dont think it would be contamintion and the cats are aftermarket high flow and were also used but i cant see how the cats would do anything atm because they are after all oxygen sensors
yes there is four two on the headers and two after the just after the cats. but i have herd that alloytec utes only have twoOriginally Posted by impulsive
The Alloytec 190 has four Oxygen Sensors (one before and one after each catalytic converter).
The Alloytec 175 has only two Oxygen Sensors (one only before each catalytic converter).
Alloytec Racing
Interesting... i would assume they would have to meet the same standards, being the same motor (basically)... i wonder why this is
Life starts at 200km/h
Can anyone tell me if they are broken or just need to be relocated or just need to be cleaned??
Alloytec Racing
cant hurt to start by giving them a clean up... I'm sure if you bought these cats there shouldnt be any probs with location, if there is take them back!
Life starts at 200km/h
The Alloytec 175 complies with Euro II emission standards, whereas the Alloytec 190 complies with Euro III emission standards (with Euro II diagnostics only).
I would imagine this would have something to do with the fact that the Alloytec is GMs 'World' engine (so I believe), and would be manufactured to comply with varied emission standards in the different countries it is exported to and used in.
Mine is a 175, and it has 4 O2's... Well it was classed as the 172 KW...
The 175s were Euro 2. The 172s were Euro 3. The 190s with 340Nm of torque are Euro 2 and with 335Nm are Euro 3.
Injected CNG, LNG & LPG: The only way to go better!
My bad. I overlooked that yours was an 06 model. I only quoted for the MY05 V6s, and completely forgot to check the MY06 specs. Will do so when I get my info source back here.
Sorry for the confusion. Once again, my bad.
Exhaust Guru
Do you know if a silicone type sealant was used when fitting the headers? It contaminates O2 sensors too. A sensor safe sealant has to be used.
No I fitted them myself didnt use any sealant I didn't know I was ment to just bought new gaskets
I bought them second hand off a wreakers so I doubt they would take them back and I forgot to mention that the cat pipes were off a 2 o2 sensor car I had the second bungs welded in and I got them put at the front by mistake
Im taking my sv6 to Sureflo Exhaust on Friday to get a full system done and the bloke told me that installing high flow cats will throw out the O2 sensors after the cats.
Ill let ya know if this happens
Exhaust Guru
Fitting headers and high flow cats to the SV6 will almost always make the check powertrain light come on. Getting a tune may or may not fix it. It will be O2 sensor related.
Move them to the rear of the cats and see what happens. That is where they are supposed to be anyway, but high flow cats convert at a different rate so the readings the back sensors take will not be the same as if the stock cats were there so it probably won't make any difference.
how did u go man
all good dude, got a set of ceramic coated pacemakers, 2 high flow 100cpsi ballistic racing cats, cat back pipes high flow mufflers and twin 3" tips. No problems with the sensors at all and its been about 3 weeks now.
Sorry that's not much help to ya.
btw it sounds sick
so ur second set of sensors are behind the cats?
yeah sure are, 2 before and 2 after the cats
did the cats u bought have the sensor holes already in them??/
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