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P1128 Diagnostic Trouble Code Discussion for May 2006

Closed Loop Fueling Not Achieved - Bank 1

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Trouble Ticket Help Requests for DTC P1128
Help Request Posted
2001 Audi TT Quattro 1.8L Misfire, MIL Lamp on VIN: TRUWT28N21
P1128: Long Term fuel trim mult. Bank 1system lean. ... start after it is hot. We pulled codes out of it and got P0118 coolant temp circuit and #P1128-long term fuel trim mult. bank 1 system lean.Car actually has bad hesitation on acceleration and at idle it feels like it drops 300 rpm every three seconds. Almo...
May 10, 2006
1999 Porsche Boxster 2.5L No Start, Poor Idle Quality, Stall, MIL Lamp on VIN: WP0CA298XX
P1128: oxygen sensing adaptation cyls. 1-3. ... and codes for air injection and oxygen sensing adaptation. The customer's main complaint was hard start on hot soak. Replaced an air injection valve and mass air flow sensor. Air injection problem solved, but hard starting continues and codes P1128, P1130,...
May 19, 2006