Codes P0306 and P2279 - Honda Pilot

JBs Pilot · 01-29-2013, 08:26 AM

I have an 05 with roughly 150k miles on it. I started getting codes P0306 and P2279. Changing all of the spark plugs and replacing the coil pack on cylinder #6 seems to have taken care of code P0306. I also recently cleaned the throttle body, removed and cleaned the ERG valve, and cleaned the upper intake manifold. I used carb cleaner on all of the hoses looking for a vacuum leak but didn't find anything. Any suggestions for what might be causing code P2279?

I have also been experiencing rough starts, mostly when the truck has been sitting overnight and it is cold out, and the VTM has been coming on. The VTM light usually turns off after the truck has warmed up or at the second start up of the day.

Any help or ideas would be great, Thanks!

GuineusMaximus · 01-29-2013, 08:36 AM

Sounds like you have a function issue with your PCV Valve since you have stated you found no issues with any of your hoses.

JBs Pilot · 02-01-2013, 12:18 AM

Ok I will try replacing my PCV valve. What fails with the PCV valve that make the computer throw a code for a vacuum leak?

GuineusMaximus · 02-01-2013, 08:12 AM

If you hear the ball moving in it then it should be ok, check for vacuum leaks at these parts:

PCV valve

PCV hose

Purge (PCS) line

Throttle body

Intake manifold

Brake booster hose

94eg! · 02-01-2013, 10:46 AM

Did you check the VTM system code you are getting? If not use the paper-clip trick to find out what's going on----> VTM light on 2003 Pilot

jarvo2 · 02-01-2013, 10:52 AM

If you need more info on the codes that are being thrown, check out my Auto Enginuity tester. Its a very useful tool for diagnosing issues!

FS: Auto Enginuity OBD2 Scan Tool w/ Laptop

94eg! · 02-01-2013, 05:08 PM

$220?!?!?! You can get free apps for your smart phone (called Torque) to do the same thing. All you need to do is buy a blue-tooth adapter for your OBD2 port from Amazon for $25.

Of course a paperclip + internet is free.

JBs Pilot · 03-20-2013, 07:01 PM

Ok I have tried the PCV valve and hose, checked the throttle body, brake booster hose, and the intake manifold. I still can't seem to find this vacuum leak. What sensor would be throwing code- P2279? I am guessing it is faulty??

Lvoffroader · 03-21-2013, 10:09 AM

May be time to look deeper, the vacuum leak could be anywhere on the vacuum side of the engine. A Cracked intake manifold, head, or gaskets for them. Expand your search area.

sdfsfs · 05-14-2013, 11:23 PM

code table: Diagnostic Trouble Code Table

01-29-2013, 08:26 AM	#1 (permalink)
JBs Pilot Registered User Join Date: Jan 2013 Location: Ankeny Iowa Posts: 7 Feedback Score: 0 reviews	Codes P0306 and P2279 I have an 05 with roughly 150k miles on it. I started getting codes P0306 and P2279. Changing all of the spark plugs and replacing the coil pack on cylinder #6 seems to have taken care of code P0306. I also recently cleaned the throttle body, removed and cleaned the ERG valve, and cleaned the upper intake manifold. I used carb cleaner on all of the hoses looking for a vacuum leak but didn't find anything. Any suggestions for what might be causing code P2279? I have also been experiencing rough starts, mostly when the truck has been sitting overnight and it is cold out, and the VTM has been coming on. The VTM light usually turns off after the truck has warmed up or at the second start up of the day. Any help or ideas would be great, Thanks!

02-01-2013, 12:18 AM	#3 (permalink)
JBs Pilot Registered User Join Date: Jan 2013 Location: Ankeny Iowa Posts: 7 Feedback Score: 0 reviews	Ok I will try replacing my PCV valve. What fails with the PCV valve that make the computer throw a code for a vacuum leak? Last edited by JBs Pilot; 02-02-2013 at 07:07 PM.

02-01-2013, 10:46 AM	#5 (permalink)
94eg! Registered User Join Date: Sep 2010 Location: Las Vegas, NV Posts: 906 Feedback Score: 0 reviews	Did you check the VTM system code you are getting? If not use the paper-clip trick to find out what's going on----> VTM light on 2003 Pilot __________________ HE>I

02-01-2013, 05:08 PM	#7 (permalink)
94eg! Registered User Join Date: Sep 2010 Location: Las Vegas, NV Posts: 906 Feedback Score: 0 reviews	$220?!?!?! You can get free apps for your smart phone (called Torque) to do the same thing. All you need to do is buy a blue-tooth adapter for your OBD2 port from Amazon for $25. Of course a paperclip + internet is free. __________________ HE>I

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01-29-2013, 08:36 AM	#2 (permalink)
GuineusMaximus Registered User Join Date: Jan 2013 Location: Upstate NY Posts: 7 Feedback Score: 0 reviews	Sounds like you have a function issue with your PCV Valve since you have stated you found no issues with any of your hoses.

02-01-2013, 08:12 AM	#4 (permalink)
GuineusMaximus Registered User Join Date: Jan 2013 Location: Upstate NY Posts: 7 Feedback Score: 0 reviews	If you hear the ball moving in it then it should be ok, check for vacuum leaks at these parts: PCV valve PCV hose Purge (PCS) line Throttle body Intake manifold Brake booster hose

02-01-2013, 10:52 AM	#6 (permalink)
jarvo2 Registered User Join Date: Apr 2009 Location: Warrenville, IL Posts: 9 Feedback Score: 0 reviews	If you need more info on the codes that are being thrown, check out my Auto Enginuity tester. Its a very useful tool for diagnosing issues! FS: Auto Enginuity OBD2 Scan Tool w/ Laptop

03-20-2013, 07:01 PM	#8 (permalink)
JBs Pilot Registered User Join Date: Jan 2013 Location: Ankeny Iowa Posts: 7 Feedback Score: 0 reviews	Ok I have tried the PCV valve and hose, checked the throttle body, brake booster hose, and the intake manifold. I still can't seem to find this vacuum leak. What sensor would be throwing code- P2279? I am guessing it is faulty??

03-21-2013, 10:09 AM	#9 (permalink)
Lvoffroader Registered User Join Date: Feb 2013 Location: Las Vegas Posts: 10 Feedback Score: 0 reviews	May be time to look deeper, the vacuum leak could be anywhere on the vacuum side of the engine. A Cracked intake manifold, head, or gaskets for them. Expand your search area.

05-14-2013, 11:23 PM	#10 (permalink)
sdfsfs Registered User Join Date: Jan 2012 Location: london UK Posts: 10 Feedback Score: 0 reviews	code table: Diagnostic Trouble Code Table

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