Having problems with your 2005 Jeep Grand Cherokee ?

U0121 code whats wrong in most cases

Posted / edited by AnonymousUser on : 15-07-2019

Answers :

Usually a P0121 is a problem with the throttle position sensor.
A mechanic would use a scanner to check the output.
You can also use a VOM and check resistance.
Repair Help & Product Troubleshooting for 2005 Jeep Grand Cherokee

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