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Posted on Aug 26, 2009
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2007 GMC Yukon codes P0121, P2544, U0101 - 2007 GMC Yukon

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  • Posted on Aug 27, 2009
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Joined: Aug 06, 2009
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P0121 Is a throttle/pedal position sensor/switch "A" circuit range/performance problem. P2544 torque management request input signal "A". U0101 lost communication with transmission control module. I hope these definitions help.

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2007 3.5l V6. Why does it show codes for no connection to the TCM u0101 and a code for driver 5 line 2 p1682 and an error light turns on?
the p1682 for pontiac is an ignition problem https://www.700r4transmissionhq.com/pontiac-g6/ as to the u0101 that can be related this code can pop up with a low voltage problem to tcm failure https://repairpal.com/obd-ii-code-u0101-lost-communication-with-tcm
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Jul 21, 2021 • Pontiac G6 Cars & Trucks
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U0101-no communication with transmission control module
Devon, are you pulling the code with a VAGCOM or a generic code reader? If a battery disconnect and reset doesn't help it is likely a bad connector, wiring problem, or a computer issue. A vagcom unit will be useful in establishing comms with the TCM.

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What is code p0049 on a gmc yukon xl 2007 mean
Code not revel ant to this vehicle!
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Aug 11, 2014 • 2007 GMC Yukon XL Denali
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What do codes B2AAA and B2A00 mean?
This is a rheostat. It wears out. You should replace the TPS.
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May 02, 2014 • 2008 GMC Yukon
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Throttle position sensor
That sensor has to be back probed & tested,
preferably with an oscilloscope & it may be just
be doing it's job & is okey & you have other
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Mar 06, 2013 • 2007 GMC Yukon XL Denali
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Trouble codes C0305 C0327 U0100 U0101 U0140
co327 is a code for your transfer case encoder motor and the U codes are communication codes. Most likely cause is the encoder motor needs replacement
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Feb 11, 2012 • 2007 GMC Yukon
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I have a 2007 GMC YUKON, my check engine light is on, and i am getting a code P0121. How can i clear up this issue?
see what the code is and have it fixed
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Mar 21, 2011 • GMC Yukon Cars & Trucks
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Check engine light is on sametimes and I check out and I have a code P0121 also I still under garanty but I dont not if i can be coverage in this matter
A code starting with P is powertrain related so most likely you can get warranty repair.I would call the dealer first and talk about options with them to determine warranty guidelines first.
Good luck!Greg
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Aug 12, 2010 • 2007 GMC Yukon
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1answer

Como puedo obtener el manual de usuario de la yukon 2007
Check here:
  1. 2007 GMC Yukon XL - Owners Manual
  2. 2007 GMC Yukon - Owners Manual

Hope helps (remember rated this).
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Aug 08, 2010 • 2007 GMC Yukon
6helpful
1answer

Where is the pedal sensor for a gmc yukon 2007 located p 0121 code
P0121 Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem
that is a drive by wire system the gas pedal has a sensor rigt above it make sure the plug is all the way in or the sensor could have a glicth in it and would have to be replaced
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Mar 24, 2010 • 2007 GMC Yukon
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