I jus purchased a 2000 bonneville nice body color miles ok. Pulld off the lot an was about to gt on the highway service engine soon light came on. I went to autozone dey pulld up two codes PO742 and PO332 the knock sensor. It startd riding rough I would get up to speed around 35mph an the car would start to jack n then wen I would drop dwn speed it would do the same thing. I went back to the car dealer an they put it on the diagnostic test only code he pulld up was the 02 sensor he cleard the code an said it prolly jus came on cuz the car was sittin for a min. Afte leavin like 5mins later it came back on. I'm taking it bk to the shop Tuesday bt I jus wana get sum help so I cn have an idea an dey dnt try to charge me ou the a&* for sumthn not that major.

Don't know about the code. Add your trim level to your signature so that we can help you out.

Don

There is no problem with the O2 sensor. 0742 TCC stuck on is the code I would worry about. That'* a transmission problem. Best get that problem fixed at the dealer.

ok wats a trimline? I'm new wit al dis. an yeah I knw that code gta b right cuz wen I drive n get up to speed the car jerks like wen switchn to da nex gear. Wen I took it to da shop where I got da car frm the only code he said he saw was da O2 sensor autozone gave me da other code n I beleve them cuz I went to two spots. Is this a major prblm? should I not drive the car?

The Torque converter needs to slip, that'* it'* job. Otherwise the engine works to hard. It'* something I would insist be fixed ASAP seeing you just bought the car. If they are unwilling to fix it they can take the car back. There should be a inspection list on the window sticker. The car should not have inspection. The car is going to buck when in lock up.

Are you texting from a phone? If not please try to write clearly.

Thanks and good luck with your car.

trimline=year, make, model. you said u had an 00 boneville, but is it an se, an sle, or an SSEi. Its best to be as specific as possible. the guys on here can really finetune their advice that way. And yeah this isnt facebook, and it is your ride on the line we're talking about, so please please type clearly. I'd hate for there to be a miscommunication all because we didnt kno what you were trying to tell us. And welcome to the forum

Ok I gt a 2000 bonneville se 120k everythng stock. I went bk to where I purchased the car frm an the mechanic gne tell me the only code he pulld up was the 02 sensor. An he says that'* not coverd under my warrenty n they tryin to charge me 100+ jus for that. Nw wit the TC is that sumthing dealing with the transmission cuz if so my trans is coverd bt hw will I convince them that if they only sayn dat 02 sensor. I also notice my gages gas,oil pressure, an thermostat movin the guy at autozone said it culd b anthr sensor culd that be true. And this may b the dumest ? bt where is the batt? this is my first pontiac an I can't seem to find it anywhere.

The O2 sensor is easy to change, perhaps $40 or $50 for the part. Charging for the scan is out of hand, autozone does it for free. With your gauges moving, that'* not a sensor, to many different gauges and each has a different sensor. A round problem is more likely the problem. The torque converter is part of the transmisstion. It'* the connection point between the engine and the trans. Take him for a ride and show him what'* up. To much relaying on computers, a good machanic can fix most problems without the computer. Your battery is under the rear seat.

Thanks dan nw u say under the rear seat? wat do I do jus lift up the seat how do I get to it? And that'* what I'm goin to do Imma take it up there Friday that'* my day off n get them to ride with me cuz they already tryna brush me off it seems. Bt I culd get sumone else to put on the 02 sensor? not the TC sensor let the shop do that an have sum1 check my grounds?