Po 299 Dtc
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From: Littleton, CO
Po 299 Dtc
Does anybody know what this code means? I retreived it with the SCT but it didn't give me any other info, I cleared it and it came back about 200 miles later. One time was pulling an empty car dolly over Wolf Creek Pass, and the other time was pulling a Toyota pickup on the dolly over Monarch Pass. Thanks
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Joined: Feb 2006
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From: waynesville, mo.
Kw is right, its turbo underboost. Chances are it either needs cleaned, replaced, or you have egr issues. Sometimes the vgt solenoid can drag that one up. Kind of surprising there is no p132b with it.
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From: Hendersonville, NC
Originally Posted by CanadaGuy
Don't forget P0299 can also mean overboost. Could be your tuner causing excessive boost.
Does the tune you are running have the "Exhaust Brake/Aggressive Tow Haul" strategy enabled? Some calibrators max out the desired EBP to match the limiting scalars at low/closed throttle to force the turbo closed, which can cause this code. If not, I would look for EGR or Turbo issues.
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Former Vendor
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From: Hendersonville, NC
Originally Posted by CanadaGuy
So I guess that means it could be a false code?
Turbo or EGR malfunction, or half-*** calibration could still be valid causes.
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From: Littleton, CO
Originally Posted by PSD 60L Fx4
SCT calibrates the desired exhaust backpressure tables and MAP desired tables to match what the duty cycle feedforwards and control loop actually produce, so assuming the turbocharger is functioning properly, this shouldn't be an issue.
Does the tune you are running have the "Exhaust Brake/Aggressive Tow Haul" strategy enabled? Some calibrators max out the desired EBP to match the limiting scalars at low/closed throttle to force the turbo closed, which can cause this code. If not, I would look for EGR or Turbo issues.
Does the tune you are running have the "Exhaust Brake/Aggressive Tow Haul" strategy enabled? Some calibrators max out the desired EBP to match the limiting scalars at low/closed throttle to force the turbo closed, which can cause this code. If not, I would look for EGR or Turbo issues.
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From: Florence,SC
there is one way to rule out the tuner. remove it. if the code comes back it is a base issue. i see that you have a 06. these later years are more sensitive to under/over boost and will throw a code due to emmission strategy.
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From: Orange County, California
I haven't seen this much on '06 trucks, but earlier trucks would set P0299 when the EBP sensor was biased. Check the KOEO PSI reading from the EBP. Should be atmospheric pressure for whatever altitude you're at.
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From: Hendersonville, NC
Originally Posted by catalinagoose
I haven't seen this much on '06 trucks, but earlier trucks would set P0299 when the EBP sensor was biased. Check the KOEO PSI reading from the EBP. Should be atmospheric pressure for whatever altitude you're at.
