Trouble codes U0126, B121A, B121C, U0100 .......WTF - Dodge Charger Forums
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#1 Old 11-19-2011, 11:31 AM
87vertgt
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Trouble codes U0126, B121A, B121C, U0100 .......WTF

So the

wipers, turn signals, windows, wipers, power locks dont work.

THE TRACTION CONTROL AND BSS AND PASS AIRBAG LIGHT IS ON.


I recently replaced the EGR VALVE AND PLUGS AND REMOVED THE LOWER CONTROL ARM TO PRESS OUT THE BALLJOINT.


Any info is apprecated

06 3.5/Mods:

Premium Gas
Air Freshner
Jumper Cables
Fix A Flat
ok ok....k/n Panel, Borla muf-dual tips
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#2 Old 11-19-2011, 01:59 PM
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U0126 - lost communication with steering angle sensor
Possible causes:
DTCs RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
CAN C BUS CIRCUITS OPEN OR SHORTED
STEERING ANGLE SENSOR POWER AND GROUND
STEERING ANGLE SENSOR
ANTI-LOCK BRAKES MODULE

U0100-LOST COMMUNICATION WITH ECM/PCM
Possible causes:
CAN B OR CAN C BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
FCM NOT CONFIGURED CORRECTLY
ECM/PCM
ECM/PCM POWER AND GROUND
MODULE THAT SET THIS DTC

B121A - RIGHT HEATED SEAT HI INDICATOR CONTROL CIRCUIT HIGH
Possible causes: (P84) RIGHT HEATED SEAT HIGH INDICATOR DRIVER CIRCUIT SHORTED TO BATTERY
RIGHT HEATED SEAT SWITCH
CLUSTER

B121C ???


Sounds like both U0100 and U0126 could be due to the steering column module (SCM) being incorrectly connected or defective. If the SCM isn't connected or working, you'd lose anything on the "driver's" side of the SCM, such as the steering wheel controls, horn, cruise control, turn signals, air bag, high beams, and wipers. Sounds like it matches your symptoms. Have you done any work around the steering wheel/steering column recently? If you have a telescoping steering column, try unlocking it and pushing it back in towards the dashboard (retracted position) to see if this makes a difference.

If the steering angle sensor can't be read, the traction control system won't be properly operational since it needs to know which way the wheels are turned to be able to properly modulate the brakes.

Not sure on the B121 codes.
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#3 Old 11-19-2011, 03:51 PM
87vertgt
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hey bud thanks for the response.

no I havent messed with the column. I do have a adjustable column I will tilt it and see what happens.

also that SCM part I cant find online or any forums that speak of how to replace it!!! weird...
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#4 Old 11-19-2011, 07:37 PM
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I didn't mean tilt the column. Some can also telescope in and out. In some cars, when it's fully out (towards the driver) the connector doesn't make good contact.

This thread describes how to remove the SCM (along with showing the connector I'm referring to).
http://www.lxforums.com/board/f63/pa...p-step-128961/
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#5 Old 11-20-2011, 01:51 AM
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oh ok yeah mine doesnt telescope

do you know who I can test my scm? i dont believe it's the issue as why would it prevent my windows or radio or hvac from working?
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#6 Old 11-21-2011, 10:14 AM
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update

battery is dead
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