PO121 error code. Throttle Position Switch - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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I posted last week, but didn't get any feedback. So I will try again. I keep getting Check Engine lights after warming up and going into limp mode. Car idles and runs great, even after CE lights. Throws out check Check Gearbox lights sometimes as well. I replaced the transmission switch because of the CG, worked great for a few weeks. Then bam, CE.
I will be heading to the dealer to do a diagnostic today, from the GM dealer. There is no Saab dealer here.
Anyone see a o121 error code before and what is the fix?
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