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P1128 Diagnostic Trouble Code Discussion for June 2005

Closed Loop Fueling Not Achieved - Bank 1

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Trouble Ticket Help Requests for DTC P1128
Help Request Posted
2001 Porsche 911 Turbo 3.6L MIL Lamp on VIN: WP0AB29921
P1128: O2 sensor bank1. Not real familiar with these. Cleared these codes once and they came back(go figure). All parameters look normal, but I'm not familiar with Porsches. The LTFT's are slightly below normal at -3, and -4%. Is this acceptable on this car? My brother has owned this...
June 23, 2005