Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi, glad to be of help.
Both P2563 and P2564 are turbo codes. Could be a bad wire to vane position sensor. First check Battery condition/connections and wiring to vane position sensor and repair as necessary.
P2563- Turbocharger Boost Control Position Sensor Performance
P2564- Turbocharger vane control position sensor low voltage
Once these tucks start setting turbo vane sensor out of range or turbo vane position not learned codes, it means the turbo is failing or has failed. If they still set the code after any wiring damage has been repaired, look to the actual turbo, not any sensors, being the problem. A new sensor comes with the new turbo, so don't waste money buying one. Be sure to have the problem diagnosed by a qualified shop before spending the money.
I don't recommend rebuilding the turbo yourself unless you've done them before. They are critically balanced and easily damaged, they must spin freely and continuously. You don't want pieces of turbo going into your engine. For peace of mind, get a new or rebuilt one. With a new one, a new sensor comes with it.
You'll need an appropriate scan tool such as Tech2 and multimeter. To test the sensor, Uplug the sensor, turn on the key, and check the three wires (unplugged) with a digital multimeter. One should be 5V, one is ground, and the third should not be 5V, but rather open or near open (well over 10k Ohm). If that checks good, key off, and test the position sensor looking at it as if it were a rheostat (it is). Using the wire data you just acquired at link below, (which is 5V, ground and signal), hand actuate the sensor, measuring resistance between the 5V pin and the signal pin. Are any anomalies noted? See this link:
P0700-Transmission Control System Malfunction
This code states that we have a trans problem ( all 700 codes relate to drivetrain) and you need to read on to find all the related codes. When I say read on, I mean scan further because P0700 only tells you which computer picked up the problem. In this case it is the TCM ( transmission control module).
P0847 -Transmission Fluid Pressure Sensor/Switch 'B' Circuit Low
This is for Transmission pressure switch d stuck closed. This code can be caused by any of the following 1)A short in the wiring for the pressure switch D circuit, Which would be wire "202" pin 2 in the red connector at the transmission TCM, "Mounted to the radiator" Or 2) A Defective D solenoid 3)A sticking shift valve in the valve body or a short in the wiring from the transmission control module to the transmission.
P0046- Turbocharger Vane Control Position Performance
The position of the turbocharger vanes is controlled by theengine control module (ECM). The ECM utilizes a turbocharger vane controlsolenoid valve and a turbocharger vane position sensor to control theturbocharger vanes. When the engine is not under load, the turbocharger vanesare in an open position, or no boost condition. When the engine is under load,the ECM commands the control solenoid valve to close the turbocharger vanes,thus increasing the boost. The ECM will vary the boost dependant upon the loadrequirements of the engine. The vane control solenoid valve uses 2 circuits, acontrol circuit and a low reference circuit. The ECM uses a pulse widthmodulation (PWM) on the control circuit to control the solenoid valve. The ECMprovides a ground on the low reference circuit. If the ECM detects that thecommanded position of the turbocharger vanes does not match the actualposition, DTC P0046 will set.
This diagnostic procedure supports the following DTC:
DTC P0046 Turbocharger Vane Control Position Performance
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The ECM detects that the commanded position of theturbocharger vanes does not match the actual position.
Action Taken When the DTC Sets
The control module illuminates the malfunction indicatorlamp (MIL) on the second consecutive ignition cycle that the diagnostic runsand fails.
The control module records the operating conditions at thetime the diagnostic fails. The first time the diagnostic fails, the controlmodule stores this information in the Failure Records. If the diagnosticreports a failure on the second consecutive ignition cycle, the control modulerecords the operating conditions at the time of the failure. The control modulewrites the operating conditions to the Freeze Frame and updates the FailureRecords.
Conditions for Clearing the MIL/DTC
If any service has been performed on the turbocharger or onthe turbocharger components, a turbocharger relearn must be performed. Failureto perform the turbocharger learn procedure may cause this DTC to set. Refer toTurbocharger Learn Procedure .
For an intermittent condition, refer to IntermittentConditions .
Did you mean P0446?If so, that is a code for EVAP Vent System performance. It is usually caused bya bad Vent Solenoid Valve or a bad Purge Valve Solenoid. There is a GeneralMotors TSB out on the problem in which the VSV must be replaced and the EVAPvent tube gets relocated up to the transmission tunnel.
Turbo repair video
I don't have any videos that are vehicle specific but thesewill give you some idea of what you'll be facing if you try rebuildingyourself.
Good luck with your project.