Hi all,

Newbie here (to this site anyway). Hoping that someone can tell me if this code is a potential problem.

Truck is 05 Duramax with a Banks (Economy / Towing) tuner, exhaust, intake and speed brake. System runs off of the Palm PDA. I have had Mike Loverich at Inglewood Transmission put a stage 3 kit in the transmission and have added an auxiliary radiator (V2 with fan) from Texas Chris in Houston. Set up to tow about 15,000 lbs worth of toy hauler. Everything to run great and after all of the mods The truck looks like it is going to be very reliable.

However, during a recent trip to Utah, I had a little episode where the truck ran rough for a short time (20 to 30 seconds) and at very low revs, belched a bunch of black smoke. I turned the engine off and reset the system (key off / on - throttle pedal 5 times etc.) and she started and ran like nothing had ever happened. I've got about 800 miles worth of towing the rig after the incident with no repeat or trouble whatsoever. I noticed the engine light shortly after the incident and checked the code with the PDA. The code came up "P2563 Turbocharger Vane Control Position Sensor Performance".

Given the current performance, I've got half a mind to clear the code and move on. But a nagging feeling (and not a whole lot of experience) keeps me from doing it. So any ideas or advice from all you Gurus out there?

 

DTC P2563

DTC DESCRIPTOR

DTC P2563
Turbocharger Boost Control Position Sensor Performance

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

TYPICAL SCAN TOOL DATA



TC Vane Position Sensor



CIRCUIT/SYSTEM DESCRIPTION
The position of the turbocharger vanes is controlled by the engine control module (ECM). The ECM utilizes a turbocharger vane control solenoid valve and a turbocharger vane position sensor to control the turbocharger vanes. The ECM will vary the boost dependant upon the load requirements of the engine. Movement of the sensor from the closed position to the open position provides the ECM with a signal voltage through the position sensor signal circuit.

The vane position sensor uses the following 3 circuits:

• A 5-volt reference circuit
• A low reference circuit
• A signal circuit

The ECM provides the sensor with 5 volts on the 5-volt reference circuit and a ground on the low reference circuit.

CONDITIONS FOR RUNNING THE DTC

• DTC P0045, P2564, or P2565 are not set.
• The engine has been running for more than 30 seconds .
• DTC P2563 run continuously when the above conditions are met.

CONDITIONS FOR RUNNING THE DTC
The ECM detects that the difference between turbocharger vane position actual and desired is more than 15 percent for more than 5 seconds

ACTION TAKEN WHEN THE DTC SETS

• The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
• The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC

• The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
• A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
• Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS

• Verify that any electrical aftermarket devices are properly connected and grounded. Refer to Checking Aftermarket Accessories. See: Diagrams\Diagnostic Aids
• If the condition is intermittent, refer to Testing for Intermittent Conditions and Poor Connections and Inducing Intermittent Fault Conditions. See: Diagrams\Diagnostic Aids
• If any service has been performed on the turbocharger or on the turbocharger components, a turbocharger relearn must be performed. Failure to perform the turbocharger learn procedure may cause this DTC to set. Refer to Turbocharger Learn Procedure.

CIRCUIT/SYSTEM VERIFICATION

1. If DTC P0698, P0699, P2564, P2565 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further information. See: Diagnostic Trouble Code Descriptions
2. With the engine running, command the TC vane position sensor with a scan tool in 5 percent increments, from 0-100 percent . Observe that the TC Vane Position Sensor parameter and the Desired TC Vane Position parameter remain near the commanded TC vane position. 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.

CIRCUIT/SYSTEM TESTING

IMPORTANT: The DMM and test leads must be calibrated to 0 ohms in order to prevent misdiagnosis. Use the DMM to perform this test. Refer to the DMM User Manual for calibration procedure.

1. With the ignition OFF, disconnect the TC vane position sensor and the ECM. Measure for a resistance of less than 10 ohms between the TC vane position sensor signal, a 5-volt reference and low reference circuits, and the ECM.

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  • If the resistance is over 10 ohms , repair the high resistance or poor connection in the faulty circuit.
  • If the resistance is less than 10 ohms , test the TC sensor.

1. With the ignition OFF, remove the turbocharger vane position sensor. Connect the vane position connector and turn ON the ignition. With a scan tool, observe the TC Vane Position parameter while slowly depressing the button on the end of sensor. Verify a smooth decreasing percent value from 100-0 percent .

•  
  • If the parameter does not decrease smoothly, replace the turbocharger vane position sensor.

1. Inspect the turbocharger for debris, damage, or stuck.

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  • If all circuits, the turbocharger, and the TC vane position sensor test OK, replace the ECM.

REPAIR INSTRUCTIONS

IMPORTANT:

• Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• Always perform the Turbocharger Learn Procedure , then review the DTC information with a scan tool.
• Turbocharger Vane Position Sensor Replacement
• Turbocharger Removal
• Control Module References for ECM replacement, setup, and programming

REPAIR VERIFICATION

1. With the engine at idle, observe the TC vane position sensor and the desired TC vane position in the TC data list. Slowly increase the engine speed from idle to 2,500 RPM , and slowly return the engine speed back to idle.
2. The TC vane position parameter should remain near or equal to the desired TC vane position parameter.

 

do you get a squeak noise comming from the turbo when you start it up?

 

Thanks 2500 HeavyDuty - That is a lot of info to digest - no turbocharger squeeks upon start up. Starts, runs and sounds smooth and normal