DTC P0243, P0245, or P0246
Diagnostic InstructionsDTC Descriptor
DTC P0243

Turbocharger Wastegate Solenoid Valve Control Circuit

DTC P0245

Turbocharger Wastegate Solenoid Valve Control Circuit Low Voltage

DTC P0246

Turbocharger Wastegate Solenoid Valve Control Circuit High Voltage

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Ignition

P0033, P0034, P0243, P0245, P0443, P06DA, P06DB*

P0243

—

—

Control

P0245

P0243

P0246

P0243

*Opens the fuse that supplies voltage to the component.

Circuit/System Description

For an overview of the component/system, refer to:Compressor Air Intake Turbocharger System Description

Circuit

Description

Ignition

Supplied from a fuse.

Control

The output circuit is switched to ground to activate the component.

Component

Description

K20 Engine Control Module

The control module contains a microprocessor used to process input data to control outputs.

The control module controls a series of actuators to ensure optimal vehicle performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the propulsion system actuators accordingly.

Q42 Turbocharger Wastegate Solenoid Valve

In the unpowered state, the output port of the valve is connected to the ventilation port (atmospheric pressure). The more voltage applied, the more the valve shifts over from the ventilation port to the pressure supply port so that the pressure at the output port becomes stronger.

A wastegate is a valve that diverts exhaust gases away from the turbine wheel of a turbocharger directly into the exhaust system. The primary function of the wastegate is to regulate the maximum boost pressure and to protect the engine and the turbocharger. The wastegate valve is actuated by a pressure actuator, which is controlled by a solenoid valve.

Conditions for Running the DTC
  • Ignition=OnorEngine=Running
  • System Voltage=Greater than 11 V

Frequency the DTC runs=Continuously—After the running conditions are met

Conditions for Setting the DTC

Control Circuit=Commanded state does not match the actual state—For greater than 2 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor category=Type A DTC—Additional actions taken:

Warning Message=Reduced Engine Power

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category=Type A DTC

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information ReferenceDTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Circuit/System Verification
  1. Ignition » On / Vehicle » In Service Mode
  2. Perform the scan tool control function:Turbocharger Wastegate Solenoid Valve»Increase&Decrease

    Verify the scan tool parameter:

    • Turbocharger Wastegate Solenoid Valve Control Circuit Low Voltage Test Status=OKorNot Run
    • Turbocharger Wastegate Solenoid Valve Control Circuit Open Test Status=OKorNot Run
    • Turbocharger Wastegate Solenoid Valve Control Circuit High Voltage Test Status=OKorNot Run
    • If not the specified state

      Refer to: Circuit/System Testing

    • If the specified state
  3. Perform the scan tool control function:Turbocharger Wastegate Solenoid Valve»Increase&Decrease

    Verify a click can be heard or felt at the following component(s) when the scan tool control function was commanded:Q42 Turbocharger Wastegate Solenoid Valve

    • If a click cannot be heard or felt

      Refer to: Circuit/System Testing

    • If a click can be heard or felt
  4. 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 data.

    Verify the DTC does not set.

    • If the DTC sets

      Refer to: Circuit/System Testing

    • If the DTC does not set
  5. All OK.
Circuit/System Testing
  1. Ignition/Vehicle & All vehicle systems » Off
  2. Disconnect the electrical connector:Q42 Turbocharger Wastegate Solenoid Valve
  3. Ignition » On / Vehicle » In Service Mode
  4. Verify a test lamp turns On between the test points:Ignition circuit terminal 1&Ground
    • If the test lamp does not turn On and the circuit fuse is OK
    1. Ignition/Vehicle » Off & Remove » Test lamp
    2. Test for less than 2 Ω between the test points:Ignition circuit terminal 1&Output terminal@Fuse
      • If 2 Ω or greater » Repair the open/high resistance in the circuit.
      • If less than 2 Ω » Verify the fuse is OK and there is voltage at the fuse.
    • If the test lamp does not turn On and the circuit fuse is open
    1. Ignition/Vehicle » Off
    2. Replace the component:Fuse
    3. Ignition » On / Vehicle » In Service Mode
    4. Verify the fuse does not open.
      • If the fuse opens and there are components connected to the circuit » Disconnect a component and repeat procedure starting at step 4.1
      • If the fuse opens with all components disconnected from the circuit » Repair the short to ground on the circuit.
      • If the fuse does not open after disconnecting a component from the circuit » Replace the component disconnected last.
    • If the test lamp turns On
  5. Verify a test lamp does not turn On between the test points:Control circuit terminal 2&Ignition circuit terminal 1
    • If the test lamp turns On
    1. Ignition/Vehicle » Off & Remove » Test lamp
    2. Test for infinite resistance between the test points:Control circuit terminal 2@Component harness&Ground
      • If less than infinite resistance » Repair the short to ground on the circuit.
      • If infinite resistance » Replace the component:K20 Engine Control Module
    • If the test lamp does not turn On
  6. Perform the scan tool control function:Turbocharger Wastegate Solenoid Valve»Increase

    Verify a test lamp turns On between the test points:Control circuit terminal 2&Ignition circuit terminal 1

    • If the test lamp does not turn On
    1. Ignition/Vehicle » Off & Remove » Test lamp
    2. Disconnect the electrical connector:X3@K20 Engine Control Module
    3. Ignition » On / Vehicle » In Service Mode
    4. Test for less than 1 V between the test points:Control circuit terminal 2@Component harness&Ground
      • If 1 V or greater » Repair the short to voltage on the circuit.
      • If less than 1 V
    5. Ignition/Vehicle & All vehicle systems » Off
    6. Test for less than 2 Ω between the test points:Control circuit terminal 2@Component harness&The other end of the circuit
      • If 2 Ω or greater » Repair the open/high resistance in the circuit.
      • If less than 2 Ω » Replace the component:K20 Engine Control Module
    • If the test lamp turns On
  7. Test or replace the component:Q42 Turbocharger Wastegate Solenoid Valve
Component TestingStatic Test
  1. Ignition/Vehicle » Off
  2. Disconnect the electrical connector:Q42 Turbocharger Wastegate Solenoid Valve
  3. Test for 20 to 27 Ω between the test points:Control terminal 2&Ignition terminal 1
    • If not between 20 and 27 Ω

      Replace the component:Q42 Turbocharger Wastegate Solenoid Valve

    • If between 20 and 27 Ω
  4. Test for infinite resistance between the test points:Each terminal of the component&The component's housing
    • If less than infinite resistance

      Replace the component:Q42 Turbocharger Wastegate Solenoid Valve

    • If infinite resistance
  5. All OK.
Dynamic Test
  1. Ignition/Vehicle » Off
  2. Disconnect the electrical connector:Q42 Turbocharger Wastegate Solenoid Valve
  3. Connect a 10 A fused jumper wire between the test points:Ignition terminal 2&12 V

    4. Caution: Complete the testing as quickly as possible in order to prevent overheating and damaging the component.

  4. Momentarily connect a jumper wire between the test points:Control terminal 1&Ground

    5. Verify the component turns On and Off when connecting and disconnecting the jumper wire:Q42 Turbocharger Wastegate Solenoid Valve

    • If the component does not turn On and Off

      Replace the component:Q42 Turbocharger Wastegate Solenoid Valve

    • If the component turns On and Off
  5. All OK.
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair:Diagnostic Repair Verification