Question about 2006 Dodge Charger

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The car stalls intermittently displays codes P2172[PCM] and C121C [ABS] U0100[TCM] P2638 [TCM] The TCM has been replaced, the shift module has been replaced the MAPP sensor has been replaced and the car still cuts out. Chrysler cant find the problem The car has been to the dealer 9 times in the last month 54000Kms

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Computer

Posted on Oct 03, 2009

  • RAPHAEL SANTIAGO
    RAPHAEL SANTIAGO Oct 21, 2013

    THE COMPUTER IS SCREWED UP?

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Code P0700 & U0100


Those codes mean the PCM has lost communication with the Transmission Control Module. Before the TCM is replaced the only diagnostic to perform is to physical inspection of the transmission wiring harness connection for dirt, water, corrosion or damage.

Apr 12, 2016 | Cars & Trucks

1 Answer

Shift light flashing no OD Changed Trans ecm/pcm shift hold light button, coil No change. CYL missfire, 2 & 3 Diagnostics code on Trans is u0401 Invalid data received from ecm/pcm/a


Circuit Description
Modules that are connected to the shared communication circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have pre-recorded information about what messages are needed to be exchanged on the serial data circuits for each virtual network. The messages are usually supervised and some periodic messages are used by the receiver module as an availability indication of the transmitter module.

DTC U0401 TCM received invalid data from ECM
Conditions for Setting the DTC
The transmission control module (TCM) detects an invalid throttle position signal, engine speed signal and/or engine coolant temperature signal for more than 2 seconds.

Action Taken When the DTC Sets
• The TCM will store the DTC when a failure is detected on the first ignition cycle.
• The TCM will illuminate the HOLD lamp.
• The TCM can no longer determine the validity of any information it may or may not receive from the engine control module (ECM). Therefore the TCM substitutes default values for engine speed, throttle position, and other engine data signals.
• Transmission operation will be reduced, affecting shift points, torque converter clutch operation, and other driveability concerns.

Diagnostic Aids
• An intermittent malfunction may be caused by a fault in the electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions in Engine Controls 1.6L.
• Repair any electrical circuit faults that were found. Refer to Wiring Repairs in Wiring Systems.
• Faulty ECM and/or TCM

Install a scan tool.
Turn ON the ignition, with the engine OFF.
Save the DTC and Freeze Frame information into the scan tool memory.
Perform the scan tool Clear DTC Information function for the transmission control module (TCM) and the engine control module (ECM).
Operate the vehicle for 1 minute or until the MIL illuminates.
Check the TCM for DTCs.
Is the Malfunction Indicator Lamp (MIL) On?
--
YES - Go to Step 2
NO - Repair the wiring connectors for intermittent failure

Select request DTC status from the Diagnostic Trouble Codes Information menu
Request DTC by status
Is DTC U0401 displayed?
--
YES - Go to Step 3
NO - Repair the wiring connectors for intermittent failure
3
Turn OFF the ignition.
Disconnect connector A from the TCM.
Turn the ignition ON, with the engine OFF.
Measure the resistance between terminal A17 of the TCM wiring connector and terminal K14 of the ECM wiring connector.
Measure the resistance between terminal A7 of the TCM wiring connector and terminal K15 of the ECM wiring connector.
Was the resistance the specified value for both circuits?
0 ohms
YES - Go to Step 5
NO - Go to Step 4

Mar 19, 2016 | 2005 Chevrolet Aveo

1 Answer

What causes I/P lights to blink when put in gear?


2005 Chrysler 300 2.7l Throttle Body Control Warning Light ...

www.cargurus.com > Questions > Chrysler > 300

CarGurusAug 7, 2014 - 2005 Chrysler 300 2.7L throttle body Control warning light or "RED ...bolt starts flashing and the car gets stuck in limp mode or second gear.Missing: p

PCM/TCM Software Updates Will Address Shifting Problems ...

repairpal.com > Problems > Chrysler > 300
Chrysler 300 PCM/TCM Software Updates Will Address Shifting Problems. ... If you experience rough shift and/or shuddering during gear shifting, software ... Car would not go over 20 mph and check engine light along with ABS/BAP light ... Once he put the new battery in the car ran fine for a while and the problems all cam ...Missing: p

ECM with bad connection, causing engine to stall - 2005 ...

? 1:08
https://www.youtube.com/watch?v=IgLe0t5may8
Oct 23, 2011 - Uploaded by SignedOnAsJoe
Check NHTSA chrysler extended the warranty on fuel tanks. ...Any one knows how can I put a used ecm in my 2005 300 do I need to buy new ... How to view fault codes Chyrsler 300 HTWL - Duration: 1:22. by Leo P 28,908 views ... Rough Run, Stumble or Stall, Check Engine Light-How To Check Vehicle ...Missing: blink

Dec 19, 2015 | 2005 Chrysler 300 Touring

3 Answers

What do these codes U0100, U0155, U0101 and P2187 mean for my mazda?


U0100 - Lost Communication with ECM/PCM "A"
U0155 - Lost Communication with Instrument Panel Cluster (IPC) Control Module
U0101 - Lost Communication with TCM
All of them are Geniric Codes 4 Mazda, I would say who ever was working on the car last, posobly forgot or missted 1 or 2 connection
plugs along the way near the last repairs. So just trace yr last steps 2 see if ther any unpluged connectors, cos looks like they all are part of same chane in that line.
P2187 - Sys To Lean at the idle Bank 1
Hope that helpes you. Good luck.
Tony D:-)

Aug 03, 2014 | 2004 Mazda 6

1 Answer

Engine light code c121c ?


Will code c121c case your car to just stop while driving.

May 01, 2014 | 2007 Dodge Charger SRT8 Sedan

1 Answer

Toyota codes u0100 and u0101


U0100 means lost of communication with ECM/PCM
U0101 means lost of communication with TCM

Feb 24, 2014 | 2007 Toyota Camry

1 Answer

U0100 AND C121C CODES


Could be anything from the ABS Module, PCM or faulty wiring.
Best bet would be to take it to a reputible shop and have them diagnose.

Oct 21, 2013 | 2006 Dodge Charger

1 Answer

Code u0100 and u0101 2008 aveo


U0100 is lost communication with the PCM (on board computer that controls everything) the U0101 is no communication with the TCM (transmission Control Module. I have read where a lot of people have had no luck trying to fix this and the delaers charge big bucks for it. typically the problem starts shortly after being jump started or having to jump start someone else and hooking the cables up properly. it can also just happen over time which is another of the many reasons i hate new cars. one fix i saw was to remove the positive battery cable and let it sit for 15-30 minutes then ground the positive cable out for 20 seconds before reconnecting it to the battery again, this may not work and if it doesn't it will require either the TCM be replaced or the dealer to have to dig into your car and charge you big time for the work. hope that helps

little side note i have seen some of these error messages cleared up by cleaning up the ground contacts for the TCM and even one fella had some luck replacing the speed control sensor in his and the lights all went away and it ran fine after that.

Feb 21, 2013 | 2008 Chevrolet Aveo

2 Answers

PO700 PO740, check engine light on. Run a test on


PO700 is a code telling you there are codes in the TCM of some late model cars where the Transmission control module has lost connection to the PCM the vehicals main computer , And basically it happens when the TCM has a issue within itself or the transmission that sets a code and it sends a request for the PCM to illuminate the SES or CHECK engine light.
PO740 is a chrystler specific code that involves your Tourqe Converter Clutch Circuit (specifically The TCC solenoid) this code if not repaired quickly could cause major transmission problems....slipping out of gear....not shifting from first to second properly and just all around trans problems...eventually leading to no shifting at all...I highly recommend fixing it soon.

Feb 22, 2010 | 2001 Dodge Caravan

2 Answers

Won't shift into high gear


po700 is the code in the pcm,telling you there is a code in the tcm( trans control module) po605 is a internal tcm error replace and program the trans control module

Sep 01, 2009 | 2002 Chrysler Town & Country

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