Code PO121 2007 Suburban
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CF Beginner
Joined: Jul 2009
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From: NW IN
Code PO121 2007 Suburban
Check engine light is on and it runs rough (hesitation) at speeds around 30/40 mph. Is this the throttle position sensor and is it something I could change out myself? I don't have a warranty as I bought the truck used. I'm just trying to save some money by doing it myself. Any tips?
Administrator
Joined: Apr 2008
Posts: 7,573
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From: Austin, Texas
have you tried any of the suggestions for the code P0121?
yes it is something you could probably do some basic troubleshooting on...
A code P0121 may mean that one or more of the following has happened:
TPS has intermittent open or short internally
Harness is rubbing and causing an open or short in the wiring
Bad connection at the TPS
Bad PCM (less likely)
Water or corrosion in connector or sensor
http://www.obd-codes.com/p0121
yes it is something you could probably do some basic troubleshooting on...
A code P0121 may mean that one or more of the following has happened:
TPS has intermittent open or short internally
Harness is rubbing and causing an open or short in the wiring
Bad connection at the TPS
Bad PCM (less likely)
Water or corrosion in connector or sensor
http://www.obd-codes.com/p0121
CF Junior Member
Joined: Nov 2012
Posts: 69
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You can do it!
Check engine light is on and it runs rough (hesitation) at speeds around 30/40 mph. Is this the throttle position sensor and is it something I could change out myself? I don't have a warranty as I bought the truck used. I'm just trying to save some money by doing it myself. Any tips?
Should cover all you need to know.
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