Code P0122 comes on only when I shift trans. into drive. Runs and shifts fine, but shifts in and out of lock-up with slightest throttle change.
Nov 26, 2012 at 2:52 AM
2001 Dodge Caravan Code P0122 Comes On Only Shift Trans Into Drive Runs Shifts
2001 DODGE CARAVAN
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P0122 – Throttle/Pedal Position Sensor/Switch A Circuit Low Input
That suggests a break in the 5.0 volt feed wire to the throttle position sensor. Check the connector for stretched or corroded terminals or a break in the 5.0 volt wire. That would be a lot more common than a defective sensor.
The additional dandy clue about the lockup torque converter can be caused by dirt in the throttle position sensor, but that code should be "voltage high". I never like to replace parts until a proper diagnosis confirms they're bad, but in this case, if you don't see a wiring problem, you may want to try a new TPS. First wiggle the wiring harness with the transmission still in park while a helper watches to see if the Check Engine light comes on. If you have a scanner you can also watch the TPS volts to see what causes the voltage to change when you wiggle wire harnesses.
That suggests a break in the 5.0 volt feed wire to the throttle position sensor. Check the connector for stretched or corroded terminals or a break in the 5.0 volt wire. That would be a lot more common than a defective sensor.
The additional dandy clue about the lockup torque converter can be caused by dirt in the throttle position sensor, but that code should be "voltage high". I never like to replace parts until a proper diagnosis confirms they're bad, but in this case, if you don't see a wiring problem, you may want to try a new TPS. First wiggle the wiring harness with the transmission still in park while a helper watches to see if the Check Engine light comes on. If you have a scanner you can also watch the TPS volts to see what causes the voltage to change when you wiggle wire harnesses.
Nov 26, 2012 at 8:11 PM
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