2004 Jeep Wrangler P0432 Code: Causes and Diagnosis Despite Passing Emissions Test

My 2004 Jeep Wrangler has recently passed emissions testing, but the P0432 diagnostic code continues to appear intermittently. After driving approximately 100 miles and resetting the system, the code reappears. NOx, CO, and HC readings during the test are all well within legal limits. I'm concerned—why is this code triggering if the catalytic converter appears to be functioning properly? Is there a specific condition or vehicle factor that could cause this issue despite passing emissions checks?