What does error code P0244 mean?
The diagnostic code P0244 is a generic powertrain/engine code. It generally applies to vehicles equipped with turbocharged and supercharged engines, including, but not limited to, certain models from Ford, Mercedes, and Subaru.
The Powertrain Control Module (PCM) regulates the boost pressure in a gasoline or diesel engine by controlling the output circuit to the “A” Wastegate/Supercharger Bypass Valve Control Solenoid.
The P0244 code is stored by the PCM when it detects a problem with the overall boost control operating range or boost-related performance that cannot be attributed to other circuit fault codes. This code can indicate a fault in the electrical circuit or a mechanical problem with the engine, depending on the exact nature of the issue.
It is important to note that troubleshooting steps can vary significantly depending on the vehicle manufacturer, the type of wastegate/supercharger boost pressure control system used, and the color of the control solenoid wires.
Possible symptoms of code P0244
Symptoms associated with a P0244 engine code may include:
- The Malfunction Indicator Lamp (MIL or Check Engine Light) is illuminated.
- A message may appear on the dashboard (instrument cluster) to alert the driver of the problem.
- Lack of engine power.
Potential causes of code P0244
Several factors can lead to this code being stored:
- Open circuit (break) in the control circuit (ground circuit) between the “A” Wastegate/Supercharger Bypass Valve Control Solenoid and the PCM.
- Open circuit (break) in the power supply circuit between the “A” Wastegate/Supercharger Bypass Valve Control Solenoid and the PCM.
- Short to ground in the power supply circuit of the “A” Wastegate/Supercharger Bypass Valve Control Solenoid.
- Short to power in the power supply circuit of the “A” Wastegate/Supercharger Bypass Valve Control Solenoid.
- Faulty “A” Wastegate/Supercharger Bypass Valve Control Solenoid.
- PCM (Powertrain Control Module) failure (although this is considered very unlikely).
Diagnostic and repair procedures
The first recommended step is to check the Technical Service Bulletins (TSBs) specific to your vehicle. The manufacturer may have published information regarding a known issue and a solution, which could save you time and money.
Next, locate the “A” Wastegate/Supercharger Bypass Valve Control Solenoid on your vehicle. Once located, perform a visual inspection of the associated connectors and wiring. Look for signs of rubbing, scraping, bare wires, burning, or melted plastic. Disconnect the connectors and carefully inspect the metal terminals inside. Check if they are burnt or show a greenish discoloration indicating corrosion. If terminal cleaning is necessary, use an electrical contact cleaner and a plastic-bristled brush. Let it dry and apply dielectric grease to the terminals before reconnecting.
The author emphasizes that the most common cause of this code is often related to electrical connection or vacuum problems.
If you have a scan tool (OBD-II scanner), clear the fault codes from the PCM’s memory and observe if the P0244 code returns. If it does not, the problem was likely related to a poor connection.
If the code reappears, it will be necessary to test the solenoid and its associated circuits. Generally, the wastegate/supercharger bypass valve control solenoid has two wires.
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Solenoid Test: Disconnect the solenoid connector. Using a digital multimeter (DVOM) set to ohms, connect the probes to the two terminals of the solenoid. The solenoid should not be open (infinite resistance) or shorted (zero or very low resistance). Consult the resistance specifications for your specific vehicle. If the solenoid is open or shorted, replace it.
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Power Supply Check: With the ignition ON and using the DVOM set to volts, check if approximately 12 volts is present on the solenoid’s power supply circuit (red multimeter lead on the solenoid’s power supply wire, black lead on a good vehicle ground). If no voltage is present, or if voltage is present when the ignition is OFF, there may be a wiring problem between the PCM or a relay and the solenoid, or potentially a faulty PCM.
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Ground Check: To check the solenoid’s ground, connect a test light to the positive (+) terminal of the battery (red terminal) and touch the other end of the test light to the solenoid’s ground circuit. Using the scan tool, activate the wastegate/supercharger bypass valve control solenoid. The test light should illuminate each time the scan tool activates the solenoid. If the test light does not illuminate, this indicates a problem in the ground circuit. If it does illuminate, wiggle the wiring harness going to the solenoid to see if the light flickers, which would indicate an intermittent connection.
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Mechanical and Vacuum Check (if applicable): Ensure all associated mechanical components are properly secured and operate freely. If the system uses vacuum to actuate the valve, verify that there is sufficient vacuum at the control solenoid. If not, locate the source of the blockage or leak in the vacuum circuit.
If all previous tests are conclusive and the P0244 code persists, it is likely that the wastegate/supercharger boost pressure control solenoid is faulty. Although a faulty PCM is unlikely, it cannot be completely ruled out until the solenoid has been replaced. If in doubt, it is recommended to consult a qualified automotive technician. PCMs often require specific vehicle programming or calibration to function correctly after replacement.