Keep getting 0121 and 0122 codes

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Aug 26, 2007 | 11:36 AM

99blancoSS

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From: ST Helens, OR

Keep getting 0121 and 0122 codes

THis is driving me slightly nuts. Keep f%^& getting these codes 0121 and 0122.. ?????

Aug 26, 2007 | 12:53 PM

Frost

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From: Richmond VA

They are both codes meant to tell you that your TPS is bad... You say you "keep" getting these so I assume you have replaced the TPS and verified the wiring back to the PCM?

Aug 26, 2007 | 01:11 PM

99blancoSS

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From: ST Helens, OR

yep, replaced it. wires look good

Aug 26, 2007 | 01:44 PM

Frost

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With the harness unplugged and the key on, what do you read on the + side that feeds the sensor from the PCM?

Sep 1, 2007 | 07:05 PM

99blancoSS

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From: ST Helens, OR

Ok, checked it all out with my multi meter not a digital readout and what I see is this: +4.4 at the + side of the plug then, when it's pluged in and I measure the output the max is 4.0 at WOT. You can see it climb as you move the throttle.

Sep 3, 2007 | 07:36 PM

tdogg5.3

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From: North of HotLanta,GA

I've had the same problem for 2 years with my truck. they say its be caused by my big cam and big stall. there was a post about it where someone changed a variable in ls1 edit and it fixed it. i'm bought edit last week so i will try this. do a search for thread for more info. its real annoying i know.