Question about Chrysler 300
This is something to do with your anti lock brakes.
I found this information at a Dodge specific message board:
"that is a network code from the manufacturer. the "U" tells me it is a network code, and the "1" after it tells me it is a manufacturer specific code.
U1120-Lost wheel distance message
Set condition: the PCM doesn't receive a vehicle speed signal from the anti-lock brake module over the CAN C bus.
CAN C bus circuit open or shorted
Anti-lock brake module
Looks like you will need to take this to the dealership for diagnostics.
Posted on Aug 25, 2010
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Posted on Jan 02, 2017
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Diagnostic Trouble Code (DTC) P1120 indicates that the Throttle Position Sensor (TPS) closed throttle position is below the range of 3.4 percent (0.17 volts). Possible causes for this DTC are:
· Damaged wiring harness or connectors
· Open or shorted Reference Voltage (VREF) circuit
· Faulty TPS
· Faulty Powertrain Control Module (PCM)
The methods/steps for diagnosing this code depend on how the code was stored and retrieved.
This code can be a Key On Engine Off (KOEO), Key On Engine Running (KOER), or a Continuous Memory code. To properly diagnose the cause of the problem a scanner must be obtained that has the ability to read each of these as well as the capability of reading live engine data from the PCM.
Direct voltage readings should be taken at the TPS connector and compared to the live data at the PCM. This will eliminate the possibility of a faulty PCM. The VREF and Signal Return circuits must be verified between the TPS and the PCM. Also the Sensor Ground circuit must be verified between the TPS connector and battery ground.
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