Subaru Problems? Ask a Mechanic for Answers ASAP
The drive cycle for the catalyst monitor will need to be done while the engine is warm. After completing the drive cycle, the engine must be turned off and then the cycle repeated. The drive cycle is provided in a graph-style format. Download the graph ((HERE)). Please remember to leave a rating using the rating system at the top of this page or accept the answer so I may be credited for this Q&A. You can ask follow-up questions any time, even after you rate or accept.