Quote:
Originally Posted by nphra
Hello,
I have 1999 Porsche 911 carrera and have Error code P1123.
here is a detail from the scaner.( O2S Sensing Range 1 Cyl, 1 - 3).
Any idea?. I did replaced ALL 4 new 02 Sensor. PLEASE HELP, this is my first Porsche. Thanks.   |
Another example of “throwing money at the problem” rather than diagnosing what the DME is telling you……… There is nothing wrong with any of your 02 sensors, probably never was.
P1123 indicates an over rich condition on one cylinder bank (cylinders 1-3) that the 02 sensor and DME fuel trims cannot adjust for, usually caused by either a leaking injector or excessively high fuel pressure.