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Q:

Keep getting p0172 code on longer trips on 1998 GMC Sonoma

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
I have changed the o2 sensor and the tps that was acting up but I still get the code on longer trips. I have clean the throttle body with spray and don't believe there is a MAF sensor on this motor. The truck runs great but the fuel economy is lower than it should be. Starting to scratch my head!
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