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08 turbo sierra codes p0121 and p1101

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Old 10-18-2016, 09:28 AM
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Default 08 turbo sierra codes p0121 and p1101

I keep getting these 2 codes since I put in a 2 bar map to read boost in hp tuners. Changed throttle body out with another and same codes. Running through MAF still and truck runs great. I believe it's an issue with the MAF, MAP, and TPS not being within range of what the virtual VE says it should be. Is there a way to tune this out other than disabling the codes? Thanks.
Old 10-19-2016, 12:48 PM
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Anybody with any experience with these codes?
Old 10-19-2016, 08:45 PM
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May be a stupid question but did you change the offset and values for the 2 bar map in the tune. If not then all the correlations between map, tps and maf will be screwy.
Old 10-19-2016, 09:14 PM
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Yes I did change the values and check to make sure that the map read the same out of the manifold as before and the same idling. I'm not sure what my other options are.
Old 10-20-2016, 08:41 AM
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when you turn the truck off and crack the throttle is the map reading ambient?
Old 10-20-2016, 07:49 PM
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I checked that before I even started the truck up.
Old 10-21-2016, 01:30 PM
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put old MAP back in it? see if the problem goes away or remains?



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