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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.
P0300 is a Random Misfire P0302 #2 Cylinder Misfire U1120 The code U1120 means, lost wheel distance message. The powertrain control module(PCM) is not
receiving a signal from the anti-lock brake module. The problem could be a short in the bus circuit,
the PCM or the anti-lock brake module. This type of problem is best diagnosed by the dealer or a
local shop with the proper diagnostic scanning equipment. Hope this helps.
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
P0137 -o2 sensor circuit low voltage [bank 1 sensor 2] sensor is located after cat converter--- possible faulty sensor/broken -damaged-disconnected sensor circuit wiring / plugged cat converter / exhaust leak by sensor --- the U1120 is an undefined enhanced manufactures specific code --wheel distance message --the PCM doesnt receive a vehicle speed message from the anti-lock brake module over the CAN C bus -possible CAN C bus circuit open or shorted / anti-lock brake module damaged or defective / PCM problem notify a dealer may be a recall or a service bulletin on the problem the code seems to pop up on the durangos also might get lucky and be covered under warranty