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2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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demented
User
Nov 20, 2013, 2:46 PM
Post #1 of 17
(6365 views)
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2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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I have a 2007 Pontiac Grand Prix.
102,000 Miles
***I Think*** the engine is 3.7 V6
It has the same problem as before, I replaced the battery and the car was doing all right for a few days.
Now it won't start all the time. Most of the time it just keeps cranking and won't turn over.
I have these codes (WITH check engine light on):
p0030
p0036
p0201
p0202
p0203
p0204
p0205
p0206
p0443
u0107
Please help me. This is my only transportation and even with the check engine light on and the cranking problems I still have to use it to get to work.
I really want to resolve this problem. If you guys can't help I guess i'll just bring it in but it's 102$ just to have a look at the car. I am not that well off. So if anyone knows what's wrong I would really appreciate it if you help me.
*Some other info*
When driving sometimes the headlights die and won't turn back on.
Only other visible/physical problems are just the cranking. The car has no other problems except for the starting problem and these codes that are showing when the check engine light is on.
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nickwarner
Veteran
/ Moderator
Nov 21, 2013, 3:28 AM
Post #2 of 17
(6341 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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You've either got a PCM on the fritz or you have an issue with a major connection of the wiring harness. The P0030 and P0036 codes are for your heating element in the oxygen sensor, the P201-P206 are all malfunctions of injectors. I have never seen all six injectors go bad and code at the exact same time. The P0443 is an evap solenoid code, and the U0107 indicates it has has lost communication with your drive-by-wire throttle pedal assembly. To have all of this happen at the same time tells me its going to need to be taken into a shop to be properly diagnosed. You need a high-end scan tool and a factory level wiring schematic to troubleshoot an issue like this correctly.
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Discretesignals
Ultimate Carjunky
/ Moderator
Nov 21, 2013, 12:04 PM
Post #4 of 17
(6332 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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Powertrain relay is probably taking a crap. That relay supplies power to all those items that you have codes for.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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demented
User
Nov 21, 2013, 1:35 PM
Post #5 of 17
(6319 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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Would replacing the powertrain Relay fix the problem?
It would cost 102$ for them to just scan for the problem
It would cost 340-500$ to replace the whole PCM.
The relay itself would cost 20$ and about another 20$ to replace. Would changing out the relay help at all or should I just have it fully diagnosed.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 21, 2013, 1:58 PM
Post #6 of 17
(6316 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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Quick read - sorry. If relay is on the suspect for all that try tapping on it with the plastic end of a screwdriver or something. If the identical relay is for like A/C compressor clutch just do a quick swap.
I don't like to toss bucks but $20 isn't so bad. I have found several relays work but not deliver full power thru them but might test out with just a test light and mess up your whole day over $20 bucks I say toss it,
T
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demented
User
Nov 21, 2013, 2:06 PM
Post #7 of 17
(6314 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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Thanks everyone for the quick responses. I will be going to autozone to replace the relay if they have to special order it i'll get it done then post back when it's replaced to tell you if the problem is fixed and if I have any codes left.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 21, 2013, 2:20 PM
Post #8 of 17
(6311 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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In stock @ my AZ! Tap on it first. Didn't check but as said see if it's the same as one you absolutely don't need for a swap test.
You had luck for a short while with new battery so that's solved a gremlin on me for a while. Looooooog hunt as things would just test and worked - just door locks on that one.
Test fine then do it when not there (not my own) and just touch anything it would behave so messed me up for quite a while.
Yours relay should look like this........
There are points inside the sucker if a new one does in fact fix it take it apart and look just for fun. Hope it's that easy,
T
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demented
User
Nov 21, 2013, 2:22 PM
Post #9 of 17
(6306 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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I can't find the relay module could you direct me to where it's at? The autozone employee said he wouldn't be able to find it if I brought my car in.
Also the image you posted isn't working for me.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 21, 2013, 2:27 PM
Post #10 of 17
(6302 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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Give me a minute to look for a location. My cheap (free) info lacks.......... Tom
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demented
User
Nov 21, 2013, 2:29 PM
Post #11 of 17
(6297 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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All right thanks, I have to catch the bus to work in about 1 hour so if I don't get back to you, you know why.
I really appreciate the help. I just hope I don't have to pay 500$ to have the pcm replaced...
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demented
User
Nov 21, 2013, 2:42 PM
Post #12 of 17
(6293 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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Found it heading to autozone now. Google is so helpful sometimes :). Thanks for taking the time to look though. I will give an update if it works today if i have to special order i'll give an update when the parts arrive
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 21, 2013, 2:47 PM
Post #13 of 17
(6290 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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Failed at finding a location quickly. Owner's manual may state where or position in with others. Sometimes a cover over a fuse relay box will say also. Several guys here may know off the top of their head or have better info if this alone (location) is a problem to find.
Good luck,
Tom
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 21, 2013, 2:50 PM
Post #14 of 17
(6286 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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It appears to be #40
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Nov 21, 2013, 5:42 PM
Post #15 of 17
(6278 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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Before you replace the relay you could do some troubleshooting to see if the relay is actually the problem. Since it doesn't want to start, it would make it really easy to figure out. Jumper the P train relay cavity and see if the engine starts. Jumper 30 to 87 in the relay cavity. Make sure you jump the correct terminals or you could fry the PCM.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Nov 21, 2013, 5:54 PM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 22, 2013, 2:11 PM
Post #17 of 17
(6252 views)
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Re: 2007 Pontiac Grand Prix Crank/Electrical problems? Please Help :(.
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Glad to hear you got it resolved.
Question closed now as solved.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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