HAVE A 2002 HONDA ACCORD EX. AFTER A LOT OF ANALYSIS, THE DEALERSHIP FEEL A FAULTY ORVR VALVE IS CAUSING SPORADIC CHECK ENGINE LIGHT CODES. ALL OTHER SENSOR AND CANISTERS IN THE EVAP SYSTEM APPEAR TO BE WORKING NORMALLY. THE DEALERSHIP SPENT TWO HOURS DIAGNOSING THE PROBLEM, AND IS CHARGING ME ANOTHER 5 LABOR HOURS PLUS 5 FOR THE PART. IS THIS OUT OF LINE? THANKS FOR YOUR TIME.