Code 121 OBD on 3.9L

1999 1500 van shows 121 error code. Is this hard to fix or simply replacing the throttle position switch? Where is the switch located?
Reply to
Moses
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it is located on the end of the intake on a part called the throttle body

Reply to
truckdriver

Now, I am confused! The Haynes manual on Dodge vans says it's a voltage mismatch from the MAP sensor though the obd tester manual said throttle position switch.

truckdriver wrote:

Reply to
Moses

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