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07 GP GT not hitting full boost check engine light on tranny shifting hard

W

Wahoo

New member
Hi, I have a 2007 grand prix gt, the the check engine light was sometimes coming on and turning off every month or so, I never looked into it because it would stay on for a week and go off back to normal for a month. Now I had my friend scan it and I guess the codes are for the MAF waste gate and I forget the other. But I just noticed the gauge doesn't let it hit full boost. Anyone run into this problem? I really hope its a cheap fix like a vacuum line or something.

Also when the check engine light was on the tranny would shift hard, even if you give very little gas it would shift hard.

I hope someone can help me fix it, thx
 
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[FONT=Tahoma, Calibri, Verdana, Geneva, sans-serif]I could really use some help, Im not knew to forums, I searched and I guess the MAF could be why the tranny shifts hard but I just don't think it could really be the MAF. Is there a vacuum line that could be causing this, because it's definitely not hitting full boost now, I'd imagine this happened to someone else too

Please help.[/FONT]
 
Sounds like a vacuum leak! Check all the lines around where they connect, spray brake cleaner around the Throttle body area and supercharger area. If you idle changes any you have a vac leak.
 
Had my check engine light scanned, here are the codes.


P0033

P0443

P0102

What do I really need to fix? I don't know if all the codes are really the problems or if it's on thing causing more than one code.
 
I checked my fuse panel and one wasn't in all the way. Also a lot of the fuses were upside down(numbers on them) so I turned them right side up and checked to see if they were still good. I don't know if I put one in the wrong spot, but now my temp sensor on my guage cluster doesn't read the engine temp. It does go up and all the way back down when I put the key in though. Little more help please :(

I also went to the local dealership because the cars powertrain warranty is still good til tomorrow, and they said they would have to charge me $100 to have it scanned inorder to see whats wrong.... I said I had it checked for free and I know the codes, but they acted like you need dealership equipment, the guy was such an asshole. I called and complained about him, and even the customer service feels that it should be double checked with dealership scan tools........what BS. I asked if my car was brand new only 2 weeks old and the check engine light came on, would they charge me $100. The customer service rep said depends on the dealership... I couldn't believe how much of a waste of time it is to call GM.

Long story short, what fuse is used for the Temp Sensor.

Thanks
 
Pull out the owners manual and see which fuse it is.

As far as the no boost and CEL's I would def. do as above and check for vac leaks. And yes, if your MAF is screwed up then it will cause all kinds of wierd issues, including ones w/ the trans.

And as for the codes some searching gave me this:

P0033- http://www.grandprixforums.net/supercharger-bypass-valve-trouble-37688.html
Basically it says to replace the solenoid for the BBV

P0443 and P0102- http://www.grandprixforums.net/p0443-p0102-37058.html
Sounds like the MAF is shot or dirty. You can try cleaning it with approved MAF cleaner, or unplug it and GENTLY drive it to see if it runs better. And do NOT try getting into boost w/ the MAF disconnected. It will also need a little throttle at first startup to keep running but should then smooth out.

The P0443 looks to be the EVAP purge valve. Probably the solenoid has stuck or gone bad.

And a powertrain warranty covers just that- the powertrain and its parts. It does not usually cover any diagnostics fees associated with finding the possible powertrain related issue. That is billed separately. You need a GM Tech II scanner to read some of the codes (ABS comes to mind), but a normal Actron scanner from Vatozone can still read most other codes.

Unfortunately GM does not/will not care about a 5 year old car that is out of factory warranty, is a dead brand and is no longer made altogether. They will treat it just like any other used car, GM make or not. I don't expect Ford to care if I called and bi*ched about my 03 Vic having an issue and the dealership not checking it for free. Its old, its used, and a dead model as well.

That's what we're here for, to be your assistance and to teach you how to fix it w/o dealing w/ the stealerships :)
 


Thanks for your response, I forgot to say the fuse that wasn't in all the way fixed my boost and tranny issues. But I'm afraid that I may have put a fuse in a wrong spot, check engine light still on, temp gauge wont work, but sweeps. I had it scanned and I guess there were like 10 codes this time..... I need to get it scanned again. It's raining out now and I don't feel like dealing with it and the weather.

Any thoughts on the temp gauge not working after I went through some fuses, what fuse controls it?
 
I may have fixed everything. One of my battery terminal connectors was broken which caused the temp gauge to not work. We'll see if my check engine light comes back on. Still need to replace the connecter, everyone's terminals are these styles?

7cdf2dbe.jpg
 
That is the correct style terminal for the 07's. If you can't find one locally (dealership) then maybe try Rock Auto. I don't know which fuse controls the temp gauge though. There should be something in the owners manual that shows which ones control that. It may be labled as ECT sensor fuse (Engine Coolant Temp).
 
Update: it was the fact the terminals were loose, that's why the gauge didn't work properly, when I checked the fuses the loose terminals moved and caused more problems... One point my car wouldn't even crank. Luckily I left the key in the run position and moved the wires and the relays started to click.

Problem solved!
 


For future reference the orientation of a fuse will not change anything. A fuse is not directional and therefore doesn't need to be oriented in a certain way. A diode is directional and does need to be thought about when you put it in the box.

Next time you post codes, please include the description. Many days I'd like to help out, but don't have time to go look up the codes for you. Helping us..helps you.
 
I know the fuse just conducts electricity to complete the circuit, I'm just weird and wanted it right side up. Strange that the one wasn't clicked in all the way tho, only one end was in allowing it to not fall out but not allowing it to complete the circuit.
 
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