trouble codes
wondering if anyone can help me with codes on my 05 duramax po 101,po299, coo55, bo229 any help please truck runs great for a while then check engine light comes on and runs like crap truck is an 05 gmc duramax with 225,000 miles one owner, max energy Afe cold air intake, mbrp 4 inch exaust - converter.
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DTC B0229
CIRCUIT DESCRIPTION The following DTCs are for the HVAC door actuators:
The HVAC control module calibrates the travel range of the HVAC door actuators when it is initially powered by the battery positive voltage circuit. During calibration, the module commands the actuators in each direction until door travel is stopped. The module stores the minimum door positions and the maximum door positions of each actuator into memory. The total travel range is calculated by subtracting the minimum door position from the maximum door position. The door actuators can be calibrated again with a scan tool. DTC DESCRIPTORS This diagnostic procedure supports the following DTCs:
The DTC sets when one of the following conditions are present:
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DTC C0055 or C003D
Circuit Description The powertrain control module (PCM) converts the signal from the vehicle speed sensor (VSS) to a 128 k pulses/mile signal. The electronic brake control module (EBCM) uses the vehicle speed signal from the PCM to calculate the rear wheel speed. DTC Descriptor This diagnostic procedure supports the following DTC: DTC C0055 Rear Wheel Speed Sensor (Both Wheels) Circuit Conditions for Running the DTC
The Conditions for Setting the DTC are no longer present and you use the scan tool Clear DTC's function. Diagnostic Aids Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Test Description The numbers below refer to the step numbers on the diagnostic table.
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DTC P0299
DTC DESCRIPTOR DTC P0299 Turbocharger Engine Underboost DIAGNOSTIC FAULT INFORMATION IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. See: Diagnostic Trouble Code Tests and Associated Procedures CIRCUIT/SYSTEM DESCRIPTION The manifold absolute pressure (MAP) sensor measures the pressure inside the intake manifold. Pressure in the intake manifold is affected by turbocharger output, engine speed, accelerator pedal input, air temperature, and barometric pressure (BARO). A diaphragm within the MAP pressure sensor is displaced by the pressure changes that occur from the varying load and operating conditions of the engine. The sensor translates this action into electrical resistance. The MAP pressure sensor wiring includes 3 circuits. The engine control module (ECM) supplies a regulated 5-volt reference circuit, a ground on a low reference circuit, and the MAP pressure sensor provides a signal voltage to the ECM , relative to pressure on the signal circuit. The ECM converts the signal voltage input to a pressure value. Under normal operation the lowest pressure that can exist in the intake manifold is equal to the BARO. This occurs when the vehicle is operated at idle or when the ignition is on while the engine is off. The highest manifold pressures occur when the turbocharger output is high. Manifold pressure can range from 58 kPa (8 psi) when pressures are low to more than 240 kPa (34 psi) when pressures are high, depending on the BARO. The MAP pressure sensor has a range of 33 kPa (4 psi) to 255 kPa (36 psi) . The ECM monitors the MAP sensor, by comparing a calculated predicted value at a predetermined engine load and speed, to the actual input. CONDITIONS FOR RUNNING THE DTC
The measured MAP pressure is 39 kPa below the expected range for 10 seconds . ACTION TAKEN WHEN THE DTC SETS
J 46091 Charge Air Cooler Tester CIRCUIT/SYSTEM VERIFICATION
CIRCUIT/SYSTEM TESTING
IMPORTANT:
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DTC P0101
DTC DESCRIPTOR DTC P0101 DTC P0101 Mass Air Flow (MAF) Sensor Performance DIAGNOSTIC FAULT INFORMATION IMPORTANT:
MAF Sensor CIRCUIT/SYSTEM DESCRIPTION The mass air flow (MAF) sensor is an air flow meter that measures the amount of air entering the engine. The engine control module (ECM) uses the MAF sensor voltage signal to provide the correct fuel delivery for a reduction in emissions. The ECM uses the MAF sensor signal to control fuel delivery until a calibrated amount of engine air flow is attained. The MAF sensor produces an output voltage based on the inlet air flow through the air induction system. This output voltage will display on the scan tool as a voltage parameter and as a grams per second (g/s) parameter. The ECM compares the actual MAF sensor voltage signal to a predicted MAF value. This comparison will determine if the signal is stuck, or is too low or too high for a given operating condition. CONDITIONS FOR RUNNING THE DTC
The ECM detects that the MAF sensor voltage signal is not within a predetermined range of the calculated MAF value for more than 15 seconds . ACTION TAKEN WHEN THE DTC SETS
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CIRCUIT/SYSTEM VERIFICATION
IMPORTANT: If you cannot duplicate the condition, operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. IMPORTANT: Verify that the engine is in good mechanical condition before continuing with this diagnostic. Verify the integrity of the air induction system by inspecting for the following conditions:
CIRCUIT/SYSTEM TESTING IMPORTANT:
IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Take off the max energy and see if that changes anything. and clean the maf sensor.
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thanks for the info going 2 take off the max energy see where that gets me ill check back in later and thanks again
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