Join Now
International Automotive Technicians Network

P1128 Diagnostic Trouble Code Discussion for September 2013

Closed Loop Fueling Not Achieved - Bank 1


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P1128
Help Request Posted
2002 Porsche Boxster Roadster 2.7L MIL Lamp on
P1128: lean condition bank 1 idle. So how is possible that we have some vacuum leak and we dont see it ? we smoke test car couple times, used propane , no change . So did any of you guys had something like this on hand ? any help would be nice? also our theory on difference in reading from filt...
September 27, 2013
2002 Porsche Boxster Roadster 2.7L MIL Lamp on
P1128: lean condition bank 1 idle. So how is possible that we have some vacuum leak and we dont see it ? we smoke test car couple times, used propane , no change . So did any of you guys had something like this on hand ? any help would be nice? also our theory on difference in reading from filt...
September 27, 2013