Question about Chevrolet Silverado 2500HD
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Posted on Jan 02, 2017
Bulletin No.: 03-06-02-005B
Date: November 18, 2004
Engine Coolant Loss with No Visible Leaks (Reseal Injector Sleeve)
Some owners may comment on engine coolant loss with no visible leaks. Excessive white smoke or a coolant type odor coming from the exhaust pipe, along with low coolant levels, may indicate coolant in the combustion chamber.
Condition may be caused by engine coolant entering the cylinder due to a dirty or damaged seal between the fuel injector sleeve and the cylinder head.
If it's black smoke, you could have a faulty or dirty EGR valve and may not be closing 100%. Remove the EGR valve and clean it with spraying carb cleaner and reinstall after inspecting the valve can move without any binding. Goo luck and hope this helps.
Posted on Jun 25, 2009
404 is exhaust gas recirculation circuit, and 405 is exhaust gas recirculation sensor circuit low. EGR sensor or ground?
Posted on Nov 13, 2009
p0404 is egr flow range, remove and clean egr passage way, it maybe built up with carbon, p0101 remove and clean mass air flow sensor. you can buy the cleaner at any auto parts store. but be carefull of the inside of sensor, follow directions on can. this should help a lot!!
Posted on Aug 22, 2010
SOURCE: I replaced egr valve on
There has been a high percentage of No Trouble Found (NTF) 6.6 LLY ECMs being returned to the Warranty Parts Center. The No Trouble Found (NTF) ECMs are being replaced for a specific list of DTCs. Recommendation/Instructions: Please do not replace the 6.6 LLY diesel engine ECM without completing all of the proper SI diagnostics. Below is a list of DTCs that are appearing on the No Trouble Found ECM replacement repair orders: P0401 P0404 and P0299: EGR and Turbo Boost Trouble Codes For EGR codes and Turbo Boost codes that set with no customer driveability complaints, verify the vehicle has the latest TIS2000 calibration update named "diagnostic enhancements for P0401 and P0404." If the EGR and Boost codes can be duplicated and the codes are set with a driveability symptom, monitor and inspect the EGR valve for sticking.Since the valve was replaced and is operating correctly it would need the calibration update at the dealer . This would be the Next step.
PIP3346A: Diesel Engine ECM Replacement - keywords 6.6 6.6L alternator calibration charge DTC EGR generator LLY P0045 P0046 P0299 P0403 P0404 P0621 P0622 P2563 PCM SES turbo - (Jun 16, 2005). Yes it would be the same issue . I would start here next . Unless that valve is bad or the ports clogged .
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Posted on Jan 26, 2011
The intake air temperature sensor on a 6.6L diesel is part of the mass air flow sensor, located just outside the air filter housing, in the intake air snorkle going to the engine. The other one is for the turbo system and is located directly at the top of the engine in the inlet pipe for the turbo. This on is the intake temperature heater / sensor, and will set a totally different code relating to the turbo. The one you want is incorporated with the MAF sensor. Usually code P0101 sets.
Posted on Feb 06, 2011
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