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AutoMD Member

AutoMD ... 3/30/2014

2010 Honda Accord EX 6 Cyl 3.5L

Preventive Maintenance

What could be causing my 2010 Honda Accord to drop 50% of the miles per gallon?

My 2010 Honda Accord has dropped by approximately 50% in the miles per gallon it once had. I have been advised by two different sources the following solutions;
1. oxygen sensors need to be replaced
2. Fuel Injection Flush should be done
Does anyone have any other suggestions or agree /disagree with the possible solutions listed above?

1 Answer


Jimm 3/30/2014

First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

This step is a must - to minimize the cost.

Before replacing any parts and incurring any costs - the OBD (on-board diagnositc) system should be scanned - for free to retrieve any stored fault codes. Any local auto parts store can scan the stored codes - even if not displayed.

Then, post a reply with any codes for further assistance. As the next step - clean the mass air flow sensor with mass air flow sensor spray cleaner aerosol. Check these items; air filter, fuel filter, tire air pressure - check and rule out the basics before spending anything for replacement parts.


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