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 Post subject: TPS
PostPosted: Sat Jan 13, 2018 3:23 pm 
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Year and Trim: 1997 Bonneville sse
I have a 1997 bonneville sse..... my check engine light came on and the code was po121 for a throttle position sensor.... I buy a new 1 n put it on
..... now it's saying there's not enough voltage from the tps. CAN ANYONE help me understand what I Need to do


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 Post subject: Re: TPS
PostPosted: Sat Jan 13, 2018 8:05 pm 
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Joined: Mon May 19, 2008 1:07 pm
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Location: Centerville, IN
Year and Trim: 1993 SSE

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Can't really help, but I did buy a TPS from carquest that only lasted a month. It might be worth returning for a replacement. In my case (series 1) the engine died every time i touched the throttle.

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 Post subject: Re: TPS
PostPosted: Sat Jan 13, 2018 9:37 pm 
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Joined: Sun Aug 22, 2010 11:11 pm
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Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
use this to est it..............http://easyautodiagnostics.com/gm/3.8L/ ... n-sensor-1

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 Post subject: Re: TPS
PostPosted: Sat Jan 13, 2018 10:25 pm 
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Was it mounted properly? On some of them it's easy to get the lever of the tps sensor mounted on the wrong side of the lever on the throttle body.

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 Post subject: Re: TPS
PostPosted: Sun Jan 14, 2018 8:23 am 
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Joined: Sat Jan 13, 2018 3:18 pm
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Year and Trim: 1997 Bonneville sse
I will get my mechanic over today and have him readjust and reapply the tps and thanks so much for the testing method really will use that after....


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 Post subject: Re: TPS
PostPosted: Sun Jan 14, 2018 8:53 am 
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Joined: Sat Jan 13, 2018 3:18 pm
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Year and Trim: 1997 Bonneville sse
John Deere Boy wrote:
Can't really help, but I did buy a TPS from carquest that only lasted a month. It might be worth returning for a replacement. In my case (series 1) the engine died every time i touched the throttle.

It doesn't die until I'm trying to park and need to hit the gas a little..... I hate dealing with sensors ..... it drives the same for the most part except when it chooses to cut off...


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 Post subject: Re: TPS
PostPosted: Sun Jan 14, 2018 7:58 pm 
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Joined: Sun Aug 22, 2010 11:11 pm
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Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
if the tps resets ok, I would next test/inspect the IAC.

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 Post subject: Re: TPS
PostPosted: Mon Jan 15, 2018 12:20 am 
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Location: Isanti, MN
Year and Trim: 2000 SLE Saved from the scrapyard.
This is a case where you want to inspect the wiring, give it a wiggle while it's running and see if you have any problems. You should have a 5v reference and a ground wire, then a signal wire going to the computer.

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