05 chrysler 300 code u1120 and u0121

I checked the first 3 and they are all Can-Bus Communication issues. Press CTRL+F and type in the code and press enter.

https://www.dtcdecode.com/Jeep

This is the last one

Jeep DTC U0212 Make: Jeep Code: U0212 Definition: Lost Communication With SCM Description: With the ignition on. Battery voltage between 10 and 16 volts. Ignition Off Draw (IOD) fuse installed. Front Control Module (FCM) is configured correctly. Bus messages not received from the Steering Control Module for approximately two to five seconds Cause:

• CAN BUS CIRCUITS OPEN OR SHORTED
• DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
• STEERING CONTROL MODULE POWER AND GROUND
• FCM NOT CONFIGURED CORRECTLY
• STEERING CONTROL MODULE
• MODULE THAT SET THIS DTC

..

Lizzie, U1120 means the PCM doesn't receive a vehicle speed signal from the Anti-lock brake Module over the CAN C bus. You may have to have a good tech. diagnose and estimate repair. Check the attached links,instruction and guides, Good luck
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U1120 Engine Diagnostic Code For 2008 Chrysler Aspen
Error Code U1110 and U1120 Chrysler Forum Chrysler Enthusiast Forums
HELP Codes U1120 U0121

U1411 Implausible Fuel Volume Signal ReceivedPossible Causes Setting Conditions
CAN 'C' Bus circuit is open or shorted to ground
Cluster module has failed
FCM has failed
PCM has failed
Key on or engine running; and the PCM determined that the Fuel Volume signal it received was implausible.
This code sets in 1 Trip(s).
This code will turn on the MIL (Malfunction Indicator Lamp) Vehicle Application: 2005 Jeep Grand Cherokee Laredo 4.7L, Vin N, Eng Cfg V8

Customer Concern: Has 11 codes. U0101, U110C, U0121, P0480, U1120, U0103, U1411, U110E, P000B, U0100, U0002. At this time there is a no crank condition.
Tests/Procedures: 1. Clear the codes and see what comes back. These are all communication codes.
2. Disconnect the modules one at a time when it is acting up and see when the communication comes back.
Potential Causes: Controller Area Network (CAN) C Module

Tech Tips: On this vehicle it turned out the Occupant Restraint Controller (ORC) which is on the Controller Area Network (CAN) B bus was actually causing the problem. It was also taking down the Controller Area Network (CAN) C bus at times. I hope this helps.

https://answers.yahoo.com/question/index?qid=20090624080003AAx0wep

Google the codes for your vehicle

Lost communication with the pcm,buss & other modules

Check all your fuses,fusible links & any ties bars in or under
the fuse & distribution boxes

Would help to have a factory wiring diagram for your testing

P0121
Throttle Position Sensor/Switch A Circuit Range/
Performance Problem. P1120 Throttle position sensor out of range
P1121. clean throttle body out good, this may fix problem. if not replace or adjust throttle position sensor. Good-Day!

U1120 means the PCM doesn't receive a vehicle speed signal from the Anti-lock brake Module over the CAN C bus. This can be caused by the ABS module, PCM or something wrong with the can bus. This might be just an erroneous code and may never set again.

My 07 dodge charger brake light,abs, esp, bas light on an check engine light on an the hand show u how fast u going don’t work I took it to auto zone an they run a check on it an the code showed up u1120 an u1121i replace the rear brake sensors an drove it around the corner but the lights are still on.

U0121 Communication error to ABS HU/CM