G'Day Richard,
1-2-2-3
The heated lambda probe regulator inner adjuster reaches the minimum or the maximum value of correction.
1-2-2-4
1. The heated lambda probe transmits to the control unit a tension 1.009V or <0.0928V.
2. The heated lambda probe malfunction persists for more than 2.5 sec.
I have always read these as:
1223, ECU complaining that it has tried altering the mixture within the limits allowed by its designers but it has been unable to get acceptable output from the O2 (Lamda) sensor.
This would indicate either a mixture problem (air leak or fuel pressure or injectors stuck or blocked) or a problem with the O2 sensor. But most likely an air leak.
1224, The O2 sensor output is behaving in such a way as to suggest failure.
1223 can turn into 1224 if left too long. That is a mixture problem can kill an O2 sensor.
1-2-2-3
The heated lambda probe regulator inner adjuster reaches the minimum or the maximum value of correction.
1-2-2-4
1. The heated lambda probe transmits to the control unit a tension 1.009V or <0.0928V.
2. The heated lambda probe malfunction persists for more than 2.5 sec.
I have always read these as:
1223, ECU complaining that it has tried altering the mixture within the limits allowed by its designers but it has been unable to get acceptable output from the O2 (Lamda) sensor.
This would indicate either a mixture problem (air leak or fuel pressure or injectors stuck or blocked) or a problem with the O2 sensor. But most likely an air leak.
1224, The O2 sensor output is behaving in such a way as to suggest failure.
1223 can turn into 1224 if left too long. That is a mixture problem can kill an O2 sensor.
