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First Post...sorry to revive an old post, but this fix has 100% cured my Increased Emissions SES issue, so felt the need to thank the OP.
2008 E92 M3 w/~53k miles on it, had been, for 3-4 weeks consistently throwing codes P0172 & 5 for bank 1 & bank 2 rich, as well as a P0191 code related to low fuel pres. around the fuel rails/injectors (this was read using an ELM wifi OBDII and dash command app). Interestingly enough, from off idle to about 2,000 RPM, the car was making metallic "pinging" noise consistent with mild detonation. It was even more apparent when gas was applied under more of a load such as climbing a hill. With the Low Pressure Sensor swapped out for a new one (per flips post above) BOTH ISSUES are now completely gone. Thanks so much for your step-by-step, easy fix.
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