Monitoring Process: Notes
The ECM monitors the averages of long term and short term fuel trim. If these fuel trim values reach and stay at their maximum limits (+/- P25 %) for a defined period of time, a diagnostic trouble code is set.
The ECM monitors the averages of long term and short term fuel trim. If these fuel trim values reach and stay at their maximum limits (+/- P25 %) for a defined period of time, a diagnostic trouble code is set.