The Powertrain Control Module (PCM) can misinterpret data from the coolant temperature sensor and set a false Check Engine (MIL) light. The PCM will need a software update for this issue.
Car Problem Reports
Honda Accord PCM may misinterpret data from coolant temperature sensor
Honda Accord Problem
Exhaust & Emissions Affected: 2.4L 4 Cylinder
Visitor, 2005 Honda Accord, 61,824 mi
check engine light on, scanner reads ect fault check sensor ok reset and still having problem