Diagnose and fix P3400, P3497 Honda codes
Honda has issued a service bulletin #11-033 to address excessive oil consumption and P3400, P3497 Honda trouble codes on the vehicles listed below.
2008–10 Accord V6 A/T – ALL
2011 Accord 2-Door V6 A/T –From VIN 1HGC…..BA000001 thru 1HGC…..BA005807
2011 Accord 4-Door V6 A/T –From VIN 1HGC…..BA000001 thru 1HGC…..BA016920 ALL VINs beginning with 5KB
2010 Accord Crosstour – ALL
2011 Accord Crosstour 2WD – From VIN 5J6TF1H5.BL000001 thru 5J6TF1H5.BL001637
2011 Accord Crosstour 4WD – From VIN 5J6TF2H5.BL000001 thru 5J6TF2H5.BL003256
2008–10 Odyssey EX-L, Touring – ALL
2011 Odyssey – From VIN 5FNRL5H..BB000001 thru 5FNRL5H..BB061689
2009–10 Pilot – ALL
2011 Pilot 2WD – From VIN 5FNYF3H..BB000001 thru 5FNYF3H..BB045679
2011 Pilot 4WD – From VIN 5FNYF4H..BB000001 thru 5FNYF4H..BB080529
On these vehicles you may notice the excessive oil consumption and a check engine light that comes on during light acceleration, accompanied by either of the following trouble codes:
P3400 VPS Stuck Off Bank 1
P3497 VPS Stuck Off Bank 2
How Honda Variable Cylinder Management works
The problem is caused by the variable cylinder management system switching on and off during light throttle conditions, at cruising speeds, or when driving on flat roads. The constant switching causes excessive oil consumption and the trouble codes appear when oil pressure drops to the point where it can no longer operate the VCM system.
If you own one of these vehicles and experience the symptoms mentioned above, the fix is a software update. Do that first before you replace any parts.
©, 2016 Rick MuscoplatPosted on by Rick Muscoplat