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P1128 Diagnostic Trouble Code Discussion for October 2006

Closed Loop Fueling Not Achieved - Bank 1

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Trouble Ticket Help Requests for DTC P1128
Help Request Posted
2001 Hyundai Accent L 1.5L Surge, MIL Lamp on VIN: KMHCF35G01
P1128: Long Term Fuel Trim Multiplier System Too Lean. ... complaint of CEL on only. Customer stated that they experienced no other drivability problems. Connected my Mentor and retrieved the P1128 code. Was testing oxygen sensor with DVOM when idle suddenly rose to 3300 RPM on it's own! Oxygen sensor was actively...
October 09, 2006
2000 Audi A4 Quattro 1.8L MIL Lamp on VIN: WAUDC28D4Y
P1128: System Lean Bank 1. ... posted, but this one has me stumped. Car came in with a lack of power and a p1128 system lean code. After researching, I checked the MAF and found it out of calibration, as well as vacuum leaks at the infamous vacuum hose in front of the timing cover, unde...
October 10, 2006