09 cobalt ss p0191 and p2178 codes
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09 cobalt ss p0191 and p2178 codes
I just bought this car and the check engine light just came on and I pulled these codes. I’m thinking the frp sensor has gone bad and the pcm defaults to a richer mixture to be safe. Am I right I’m thinking this or should I be looking deeper than just replacing the frp sensor?
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