Engine Codes
#1
Engine Codes
I tried to open the explanation of engine codes, but could not get it to open. Can anyone explain these codes to me?
PO 299 (might have been 289) - Turbo Underboost
PO 401 - EGR insufficient flow detected
PO 478 - Exhaust pressure control valve high
PO 488 - EGR throttle position control range/performance
PO 299 (might have been 289) - Turbo Underboost
PO 401 - EGR insufficient flow detected
PO 478 - Exhaust pressure control valve high
PO 488 - EGR throttle position control range/performance
#2
I tried to open the explanation of engine codes, but could not get it to open. Can anyone explain these codes to me?
PO 299 (might have been 289) - Turbo Underboost
PO 401 - EGR insufficient flow detected
PO 478 - Exhaust pressure control valve high
PO 488 - EGR throttle position control range/performance
PO 299 (might have been 289) - Turbo Underboost
PO 401 - EGR insufficient flow detected
PO 478 - Exhaust pressure control valve high
PO 488 - EGR throttle position control range/performance
so the truck runs Bad??????????? with all that Pretty shure it does run Rough
P0299 Turbocharger/Supercharger "A" Underboost Condition D* D
P0401 C* Exhaust Gas Recirculation Flow Insufficient Detected EGR Valve Position does not match desired, limits based on
engine speed / load.
EGR Valve stuck or sticking - EGR Valve Position Sensor Bias - EP
Sensor bias.engine speed / load.
EGR Valve stuck or sticking - EGR Valve Position Sensor Bias - EP
P0478 C* Exhaust Pressure Control Valve High Input EP is higher than EP desired by 260 kpa (37.7 PSI) for
greater than 30 seconds.
Faulty EP sensor, VGT control valve slow to respond, Stuck VGT
valve, faulty PCM.greater than 30 seconds.
Faulty EP sensor, VGT control valve slow to respond, Stuck VGT
P0488 Exhaust Gas Recirculation Throttle Control Circuit "A" Range/Performance D+ d d D*
Any recent work?????
What scanner did you pull these DTC with????????????
Do you have a EGR Deleate?????
#3
No recent work, it does not feel very rough when I drive it. Getting about 12.5 mpg right now (city), and just bought it a month ago. Getting the valve cover gaskets replaced and the guy at the shop read off the codes for me. Not sure what system he used, but I have not had any engone lights come on either. To my knowledge there is not an EGR delete on it.
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