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Comments
P0120 Throttle/Pedal Pos sensor A clef malf
P0156 025 clef malf 2/2
P0157 025 clef low volts 2 2
P0332 knock sensor 2 clef low input bank 2
P0496 Evap high purge flow fault
P2135 Throttle/pedal position sens/SW A/B voltage correlation
I HATE the idea of going to a dealer to have the issue taken care of because I am hoping it's either faulty wiring or a sensor and in owning cars for over 20 years I have yet to have a good experience with taking my car/truck to a dealer to have it repaired. Does anyone have any suggestions, guidance, or direction? Even if I could get my hands on an Avalanche electrical schematic I may have a shot at troubleshooting this issue? the biggest problem is that the engine will not accelerate higher than 20 miles per hour once the warning comes on, and it comes on sporadically so it needs to be taken care of ASAP. Help anyone? Thank you!!!
As far as the Knock Sensor and other codes may be triggered by the pedal sensor, so zoom in on the pedal sensor first.
p.s. i had a little luck with mine if the light would'nt go away after 4 or 5 starts by unhooking the positive battery terminal for 5 mins or so , this usually gives me 6 or 7 trouble free starts before i have to do it again. good luck and if anybody else has this problem and it seems temperature related like mine, please let me know how you finally fix it.
P0120, P0122, P0220, P0222, P2135.......
:mad:
Well I have had this problem for the last 8 months and I was able to get through it by just shutting down and then restarting. It would last for days and sometimes even months, but the last couple days it had gotten worse and yesturday I read this blog and didn't find any loose wires. I did find that the pressure sensor on the top of the engine, back towards the firewall was connected, but loose. I took the cover off and then the three plate screws and removed the plate. I then diconnected the sensor and wrapped the rubber seal with some teflon tape and this snugged up the connection. Immediately on start up the check engine light cleared and is running great. I hope this helps, and lasts!!
So before changing parts look at these wires from inside even if they look fine.
The mechanic (who has worked for GM for 12 years) said it was a common problem on these wireless pedal-throttle-body assembly.
I own a 2003 GMC Yukon, recently the low engine power warning and check engine light came on. Here's the kicker...I read all the post and recommendations and even printed the fixes and took them to the mechanic who thought he repaired it after checking the wires, I changed the gas cap to a locking one. The mechanic after being asked to check the wires first, said he removed and reconnected them without problem from the vehicle during test driving. The moment I pick up the vehicle the first time, I get a block away from home and loss of power occurs. Back to the mechanic it goes and I'm told its the Throttle Body that needs replacement. Guess what happen today after about a week....Low Engine Power!!! Please if anyone can recommend a mechanic that has actually repaired this problem, it would be of great service than having a mechanic tell me to "turn the vehicle off then retry to start it" I'm at my wits end here and GMC is not looking too good right now because most dealer mechanics are rip offs anyway. No recall or anything...some help they are.
In looking at other forums this is a wide spread problem with the GM fly-by-wire controls
Can you please e-mail me with more information regarding your vehicle (including current mileage) and situation? I look forward to your response.
Christina
GM Customer Service
Bringing to the "STEALERSHIP"seems like not solving the problem for our friends here, and looks like veryone has a different fix that worked (when worked, lol), so it is a factory problem that must be addressed by GM not by our own pockets, I'm REALLY ANGRY!!!!!!
Thanks.
Giulianno
I'll keep you guys posted.
Thn after couple of days while driving I had the same message, I turned off the car for couple of seconds thn turned it on everything went back ok again.
I took it to the dealer they changed the throttle body module, but later I had the same problem
With these codes : 1516, p 2108 and u0107...
And driving that huge car in the street and suddenly can't move for an unknown reason that even dealer isn't solving is a bit shame
Any suggestions?
How can I assist you?
Christina
GM Customer Service
If you are unhappy with the work that is being done at your dealer I would recommend seeking a different dealer. Please keep me posted.
Christina
GM Customer Service
So how much u dare to help me here?
One more time I appreciate your quick reply hoping that yr next reply will be useful and helpful
U2 sut 2006
Good luck folks.
Thank you for your time.
Jonesey_101
Thank you for your time.
Jonesey_101
Thank you for any insight...
Sincerely.
Jonesey_101
I am posting my recent ordeal with my 2007 GMC Yukon, because I too am extremly frustrated with the incidents and mainly GM, and their poor products, and customer service. Over the last month, I had three seperate incidents whereby I was driving and the check engine light would appear, and within moments, the engine reduced power message flashes, and the vehicle loses power. Luckily, each time I was able to pull over to the side of the road/interstate and out of harms way.
I took the vehicle to the same GM dealership each time. The first time, they reset codes and cleaned the throttle body. Two weeks later, the incident occurred again. Back to the dealer, and this time, a different set of codes (unsure which ones) and I rode off into the sunset. Only to return three weeks later, with the same issue. On this visit, the decision was made to replace the throttle body.
Here is my issue - my 2007 GMC has on 77,000 miles and is covered under the 5yr/100,000 powertrain warranty. The throttle body assembly is a covered component under this warranty. In 2010, the warranty was altered by Gm and they no longer cover this part, amongest several others. But this is only for 2010 models and newer! Therefore, models 2009 and older ARE covered. I had to generally go to war with the GM Area District Specialist, about this issue. He wanted to say because they made the changes to the 2010 warranty (removing the throttle body assembly as a covered part), my 2007 vehicle was no longer covered. After a week of constant debating, and the investigaton by a different District Specialist, they covered the part and advised the confusion was their error.
So, if you have a vehicle with the specified problem and it falls under warranty (within the designated mileage, less than 100k miles) FIGHT to make certain it is taken care of under your warranty. This part is $500+ to repair out of pocket, and you shouldn't have to pay it when it is covered.
Hope this helps! In addition, I have filed this complaint with the National Highway Traffic Safety Administration (www.nhtsa.gov), and your complaints can help our problems be elevated to a recall status, and protect others and even safe a life. Go to their webite or call to file the complaint! There is strength in numbers! Also, please see the attached bulletin below. This way you can read it for yourself. Good luck!
*************************************************************************
GM Service Operations
**Urgent Message**
DCS 412
DATE: September 21, 2009
TO: All US GM Dealers, Service Directors, Warranty Administrators and Parts Managers
SUBJECT: Changes to the General Motors 100,000 Mile/5 Year Powertrain Warranty for 2010 Model Year Vehicles
This message is to provide information regarding the a few changes to the GM Powertrain Warranty for 2010 model year vehicles. Previous model year vehicles are NOT affected by these changes.
For model year 2010, General Motors is announcing a slight change in the components that are covered under the 100,000 mile/5 year limited warranty on all light duty cars and trucks. The Warranty and Owner Assistance Information booklets have already been updated with these changes in all New 2010 model GM vehicles.
The following items have been eliminated from the Powertrain portion of the coverage for 2010, however, they will continue to be covered for the entire length of the Bumper to Bumper Limited Warranty for all GM vehicles. Select components may also be covered by Federal or State Emission coverage. Please refer to the Labor Time Guide and Policies and Procedures (P&P) manual for further details.
1) The entire pressurized fuel system (in-tank fuel pump, lines, fuel rail, injectors and return line.
2) The Engine/Powertrain Control Module (ECM/PCM) and module programming.
3) The Transmission Control Module (TCM), Transfer Case Control Module and module programming.
4) The Throttle Body Assembly.
5) Clutch and Pressure Plate for Manual Transmission.
6) Sealed Wheel Bearing Assemblies or Hub and Bearing Assemblies (axle shafts, seals and bearings that are part of
complete axle housings are still covered).
The following items have been added to the Powertrain portion of the coverage for 2010.
1) Engine oiling system including the hoses, lines and cooler.
2) Crankshaft Pulley.
3) Clutch Master Cylinder.
The GMVIS (GM Vehicle Inquiry System) and the new Global Warranty Management Investigate Vehicle History screen allows you to identify this new warranty by the abbreviated description under the Applicable Warranties section. The word warranty at the end of the description is abbreviated “WTY”. Previous 100,000 mile/5 Year Warranties have the entire word spelled out.
See: www.truthaboutcars.com for the full posting of this memo.