Monitoring Process (VIN 6)
The ECU monitors the averages of long term and short term fuel trim. If these fuel trim values reach and stay at their maximum limits (+/-25%) for a defined period of time, a diagnostic trouble code is set.
The ECU monitors the averages of long term and short term fuel trim. If these fuel trim values reach and stay at their maximum limits (+/-25%) for a defined period of time, a diagnostic trouble code is set.