P0299 code
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Senior User
Joined: Aug 2006
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From: Roseburg, Or
P0299 code
06 6.0L keeps giving a turbo underboost code. The thing is i only get it on vehicle startup, right after truck starts. I'll clear the code and won't get another P0299 until the next time i start the truck up. If the turbo was sticking or failing wouldn't i get a code during driving periods also? Bad sensor? Any ideas? Thanks
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
From what Im seeing is P0299 is continous monitored
Code 0299
(2004 MY only) will be set if the difference between EP and EP desired meet any of
the following conditions:
Greater than 14 kPa or 2 psi with RPM below 800 for 15 seconds
Greater than 20 kPa or 2.9 psi with RPM between 820 - 1995 for 30 seconds
Greater than 80 kPa or 11.6 psi with RPM above 2000 for 90 seconds.
You can try and clean the EBP sensor and Tube see if it helps
You need a Gauge that plugs into OBDII Port at this Point
Code 0299
(2004 MY only) will be set if the difference between EP and EP desired meet any of
the following conditions:
Greater than 14 kPa or 2 psi with RPM below 800 for 15 seconds
Greater than 20 kPa or 2.9 psi with RPM between 820 - 1995 for 30 seconds
Greater than 80 kPa or 11.6 psi with RPM above 2000 for 90 seconds.
You can try and clean the EBP sensor and Tube see if it helps
You need a Gauge that plugs into OBDII Port at this Point
Junior User
Joined: Mar 2013
Posts: 54
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X2 on what Blade said.
I just went through the p0299 on my 06. My check engine light stayed on and the turbo was fairly non existent. Many times this code will show when the vanes in the turbo stick too. I cleaned the turbo, and the condition and code still returned so I checked the ebp sensor in correlation with map and Baro and the ebp numbers were not reading correctly. I believe at koeo all 3 sensors should be within .5 psi of each other. I ended up changing ebp and put new pigtail. Cleaning the tube and sensor may help as Blade said. It fixed the turbo and p0299 code. Your case may be different but this worked for me. Good luck with it.
I just went through the p0299 on my 06. My check engine light stayed on and the turbo was fairly non existent. Many times this code will show when the vanes in the turbo stick too. I cleaned the turbo, and the condition and code still returned so I checked the ebp sensor in correlation with map and Baro and the ebp numbers were not reading correctly. I believe at koeo all 3 sensors should be within .5 psi of each other. I ended up changing ebp and put new pigtail. Cleaning the tube and sensor may help as Blade said. It fixed the turbo and p0299 code. Your case may be different but this worked for me. Good luck with it.
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
I dont have time to paste a pic
I beleive yours is to the side of the coolant bottle towards Valve cover
Has a Steel tube coming off the fron t of the Driver side exhaust manafold going to EBP
I beleive yours is to the side of the coolant bottle towards Valve cover
Has a Steel tube coming off the fron t of the Driver side exhaust manafold going to EBP
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Hotshot
Joined: Apr 2010
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From: Saratoga Springs,UT
Have no idea but worth a shot
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Senior User
Joined: Aug 2006
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From: Roseburg, Or
k thanks, I'll look.
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Joined: May 2004
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Been dealing with this myself lately. I get the P0299 going up inclines or under load. Pulled off the EBP sensor and tube last week on my '05 and both were clean. Dreading pulling off my turbo this weekend, but I don't have to tools to do the VGT diagnostic that shops can do. Guess it can always use a good cleaning.
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
Been dealing with this myself lately. I get the P0299 going up inclines or under load. Pulled off the EBP sensor and tube last week on my '05 and both were clean. Dreading pulling off my turbo this weekend, but I don't have to tools to do the VGT diagnostic that shops can do. Guess it can always use a good cleaning.
Ya But whats
BARO
MAP
EBP
VGT SILINOID TROUBLESHOOT
There definitely should be a noticeable difference when the VGT actuator is plugged in or not. If you have access to a wiring pigtail, (exactly identical to that of a 7.3L injector or IPR connector), you can test this out yourself, by holding it up to 1200 RPMs in PARK or NEUTRAL and supplying your own power and ground directly to the actuator via a pigtail connector. When you do this, you should hear the turbo spool up almost immediately, and stop when you remove the power and ground supply. If it does not, the VGT actuator is bad. By doing this, you elimate the need to get your hands on a scan tool to take active command of the actuator.
Senior User
Joined: May 2004
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0RPM
EBP 14.9
MAP 14.6
BAR 14.6
LI RPM 688
EBP 17.1
MAP 15.3
BAR 14.6
HI RPM 2409
EBP 22.0
MAP 15.7
BAR 14.6
Don't have access to a wiring pigtail unfortunately.
My turbo seems to act normally for the most part. I got the P0299 code first while pulling on to the freeway with my 12k trailer. Then again while going up a 6deg incline, unloaded, recently on two occasions.
EDIT: Don't mean to hijack emmagator's thread, but thought this information might be useful for others with this code. Thats why I scour these P0299 threads.
EBP 14.9
MAP 14.6
BAR 14.6
LI RPM 688
EBP 17.1
MAP 15.3
BAR 14.6
HI RPM 2409
EBP 22.0
MAP 15.7
BAR 14.6
Don't have access to a wiring pigtail unfortunately.
My turbo seems to act normally for the most part. I got the P0299 code first while pulling on to the freeway with my 12k trailer. Then again while going up a 6deg incline, unloaded, recently on two occasions.
EDIT: Don't mean to hijack emmagator's thread, but thought this information might be useful for others with this code. Thats why I scour these P0299 threads.
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
0RPM
EBP 14.9
MAP 14.6
BAR 14.6
LI RPM 688
EBP 17.1
MAP 15.3
BAR 14.6
HI RPM 2409
EBP 22.0
MAP 15.7
BAR 14.6
Don't have access to a wiring pigtail unfortunately.
My turbo seems to act normally for the most part. I got the P0299 code first while pulling on to the freeway with my 12k trailer. Then again while going up a 6deg incline, unloaded, recently on two occasions.
EDIT: Don't mean to hijack emmagator's thread, but thought this information might be useful for others with this code. Thats why I scour these P0299 threads.
EBP 14.9
MAP 14.6
BAR 14.6
LI RPM 688
EBP 17.1
MAP 15.3
BAR 14.6
HI RPM 2409
EBP 22.0
MAP 15.7
BAR 14.6
Don't have access to a wiring pigtail unfortunately.
My turbo seems to act normally for the most part. I got the P0299 code first while pulling on to the freeway with my 12k trailer. Then again while going up a 6deg incline, unloaded, recently on two occasions.
EDIT: Don't mean to hijack emmagator's thread, but thought this information might be useful for others with this code. Thats why I scour these P0299 threads.
No worries all the same topic
Personaly I think its good to group togetherr then you got a few more sets of eyes on things
Never know someone may Catch something
Your High Idel EBP is about 8psi High
Can you drive it in a way to Pop the Po299 DTC???????
I mean its close but its out so my thoughts were if you can drive it in a way to Trigger the P0299 then Unplug the EBP sensor and go for a Ride see what happens
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
Dont worrey about hte Pigtail just take a Wire and Strip the insulation back and stick it in the Back the VGT Pigtail to do that test
Just be careful you will have a hot wire becareful where you stick it
Be best if you did Unhook it from the PCM though Dont feed power Back to PCM
Just be careful you will have a hot wire becareful where you stick it
Be best if you did Unhook it from the PCM though Dont feed power Back to PCM
Senior User
Joined: May 2004
Posts: 313
Likes: 0
Actually, I should retake my readings since I did clean the sensor and tube while I had it out and haven't retested it. Does it matter if the truck is at operating temps?
As far as testing out the VGT, My truck seems to boost fine up to 28PSI when I get on it. I would think the VGT would actuate just fine if fed with a hot 12V line. I was suspecting an intermittent issue causing an underboost. I'm quite comfortable around electronics so it's an easy test I'm willing to perform it it means not dealing with a turbo removal.
Not sure I've had the code pop up enough to say I can reproduce it reliably though.
Is there a pinout diagram for the VGT connector somewhere I can reference?
As far as testing out the VGT, My truck seems to boost fine up to 28PSI when I get on it. I would think the VGT would actuate just fine if fed with a hot 12V line. I was suspecting an intermittent issue causing an underboost. I'm quite comfortable around electronics so it's an easy test I'm willing to perform it it means not dealing with a turbo removal.
Not sure I've had the code pop up enough to say I can reproduce it reliably though.
Is there a pinout diagram for the VGT connector somewhere I can reference?