Fault description
The diagnosis monitors the trim controller (trim controller --> persistent deviation integrator).
The fault is detected when the I-component of the trim controller is greater than -4 %.
Possible fault cause:
- Secondary fault
- Silencer assembly leak between controller and monitoring sensor
- Oxygen sensor before catalytic converter defective
- Oxygen sensor after catalytic converter defective
- Wiring harness of oxygen sensor after catalytic converter defective
- DME defective