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P0301 and P0497 OBD2 Codes in 2009 Honda Pilot 3.5L V6: Fix with Intake Hose Replacement?

Model: 83-1 Fault Code: P0301 Posted: 2019-01-05 11:59

My 2009 Honda Pilot EX with a 3.5L V6 SOHC 24-valve V-Tech engine is showing OBD2 diagnostic codes P0301 (Cylinder 1 Misfire) and P0497 (Evaporative Emission System Malfunction). The vehicle also reports B1-1 battery voltage malfunction and an 83-1 Engine Control Module issue. There is a significant tear in the accordion fold of the air intake hose, located just after the MAF sensor and before engine attachment. I am wondering whether replacing this damaged intake hose—which could resolve vacuum leaks—will fix both the cylinder misfire and evaporation system errors. Aside from the battery voltage problem, will addressing the vacuum leak through hose replacement clear these codes? Any guidance on how to verify or reset the codes would be appreciated.

Related fault codes
P0301P0497
Comments (3)
Anonymous 2019-01-05 12:59

First, confirm that the battery and system voltage are within normal range. Then erase the stored codes using an OBD2 scanner and monitor for any new codes after driving under various conditions. If a vacuum leak is present, it should be noticeable during idle with elevated positive fuel trim values—check the fuel trims on your scan tool or via a diagnostic device.

Anonymous 2019-01-05 18:52

Thanks for the reply. The tear in the intake hose is located after the MAF sensor and just before it connects to the engine. I don't currently have equipment to measure fuel trim values, so this is a DIY project. However, I can recheck the OBD2 codes after repairs. Will simply disconnecting the battery for a few minutes clear these diagnostic codes on my 2009 Honda Pilot?

Anonymous 2019-01-05 19:04

A standard battery disconnection—holding both positive and negative terminals together for about 15 seconds or disconnecting for several minutes—typically clears stored OBD2 fault codes. This method works reliably on most vehicles, including the 2009 Honda Pilot.