One problem related to water pump has been reported for the 2010 Honda Accord. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Honda Accord based on all problems reported for the 2010 Accord.
When driving on the freeway on my way to work the check engine light came on. After exiting I checked for error codes (as I always carry the p-code reader with me). The code stated that cylinder 3 was misfiring. I double checked all spark plugs to make sure the connections were okay. The engine light continued to come on, with a rough idle, and engine codes started to be more spontaneous as it stated random misfires/multiple cylinder misfires. I took my car to Honda and was told that I likely need to replace the ignition coil, so I did that and still experienced the same problem. I then took it to a shop where they also suspected bad ignition coils. They then did a valve adjustment and was positive that would fix the problem. After performing that job, the car continued with the same rough idle but only populated the error code stating cylinder 3 is misfiring. They took out the spark plug and ignition coil on cylinder 3 and discovered a cracked intake valve. I've spoken to at least 10 shops, 2 Honda service dealerships, and 2 personal mechanic friends that all state that a broken intake valve at 107k is very unusual and likely a result of poor design. I have read about the class action lawsuit for all v6 Honda Accords between 2008-2012. Unfortunately the 2010 v6 6 mt is one of the few models left out of that law suit. I have already had a shop start on the repairs as I have no choice but to have them done ASAP. I figure an unlikely event like this is due to poor engine design since I have thoroughly kept up with all scheduled maintenance (spark plugs, timing belt, water pump, oil change, etc. . ). I feel that Honda should be responsible for this 2000$ dollar repair.