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Inflate the tire. If that doesn't do it, you might have something wrong with the TPS.
on top of the trasnmision
P1120 on my 2000 Tundra V8 meant that the TPS was malfunctioning. The TPS can cause a variety of problems. The TPS is located on the passenger side of the Throttle Body.
check the manual
P0120 code is for the TPS/Throttle pedal position sensor .
Inflate the tire. If that doesn't do it, you might have something wrong with the TPS.
Problem with the electronics of the transmission. Take it to a professional. Has the TPS (throttle position sensor) been replaced? If so, this will happen 100% of the time after a short amount of miles & you have to reset the transmission to the new sensor.
Check the TPS
how to replace tps on 95 chevy 6.5 turbo diesel 1500
It's only purpose is related to the TPS (Throttle Position Sensor) attached to the carbs... The TPS controls ignition advance...
The check engine light would illuminate.
Probably a senor: MAP, MAF, IAC, pr TPS