P1564 (Volkswagen, Audi, Skoda, Seat) Throttle control module - low voltage when performing basic tuning

P1564 - OBD-II Trouble Code Technical Description

Trouble code P1564 indicates low voltage when performing basic throttle control unit tuning in Volkswagen, Audi, Skoda, Seat vehicles.

What does the fault code mean P1564?

Trouble code P1564 indicates a low voltage condition that is detected during the Electronic Throttle Control (ETC) basic learn process. The throttle valve controls the amount of air entering the engine in response to commands from the engine control module. Basic learn occurs at the beginning of system operation and allows the throttle position to be set to zero. When the ECM detects that the voltage received from the throttle position sensor is below normal levels during the basic learn process, it sets the trouble code P1564.

Possible reasons

Trouble code P1564 can be caused by a variety of reasons, including the following:

• Throttle Position Sensor (TPS) malfunction: The throttle position sensor monitors the throttle position and sends information about it to the engine control module. If the sensor is faulty or not working properly, it can cause a P1564 code.
• Problems with wiring or connectors: Loose connections, breaks or shorts in the wiring, connections or connectors associated with the throttle position sensor or engine control module can cause low voltage and therefore the P1564 code.
• Engine Control Module (ECM) malfunction: If the engine control module is not functioning correctly or has a faulty electronic component, it may misinterpret signals from the throttle position sensor and generate a P1564 code.
• Throttle problems: Defects or breakdowns in the throttle mechanism may cause the throttle to be mispositioned or the voltage to be reduced, resulting in an error.
• Power problems: Low voltage in the vehicle's electrical system, caused by a bad battery or alternator, for example, can also cause P1564.
• Software errors: Errors or inconsistencies in the engine control module software can lead to incorrect interpretation of signals and the generation of erroneous fault codes.

To accurately determine the cause of error P1564, it is recommended to conduct a detailed diagnosis of the engine management system using specialized equipment.

What are the symptoms of a fault code? P1564?

Symptoms for DTC P1564 can vary depending on the specific problem and its impact on engine and control system performance, some of the possible symptoms include:

• Uneven engine operation: The engine may shake or jerk when idling or driving.
• Loss of power: The engine may experience loss of power when accelerating or driving under load due to improper throttle operation.
• Accelerator pedal response delay: Increased response time to the accelerator pedal or lack of response when pressing the accelerator pedal may be signs of a throttle problem.
• Unstable idle: The engine may idle erratically, fluctuating or exhibiting unusual vibrations.
• Difficulty starting the engine: The engine may be difficult to start or may need to be restarted due to incorrect throttle position.
• Increased fuel consumption: Improper throttle operation can result in increased fuel consumption due to ineffective air and fuel mixing.
• Error messages appear on the instrument panel: If a problem is detected, the vehicle's control system may display an error message on the instrument panel or activate the Check Engine Light.

These symptoms can occur to varying degrees and may depend on the specific problem with the throttle control system.

How to diagnose a fault code P1564?

The following steps are recommended to diagnose DTC P1564:

1. Reading the error code: Use a scan tool to read the P1564 fault code from the Engine Control Module memory.
2. Checking the Throttle Position Sensor (TPS): Check the operation of the throttle position sensor for signals corresponding to changes in the position of the gas pedal. Also check the wiring and connectors connecting the sensor to the engine control module.
3. Checking the throttle valve: Check the mechanical condition of the throttle valve for binding or blockage that could cause improper operation.
4. Checking power and grounding: Check the supply voltage and ground connections at the throttle position sensor as well as at the engine control module.
5. Checking the Engine Control Module (ECM): Check the engine control module for errors or malfunctions that could cause the throttle valve to not operate properly.
6. Checking sensor signals on an oscilloscope: Use an oscilloscope to analyze the signals coming from the throttle position sensor to ensure they are correct and stable.
7. Checking connections and wiring: Inspect and test all electrical connections and wiring associated with the throttle position sensor and engine control module for corrosion, oxidation, or damage.
8. Checking other control system components: Check other engine management system components, such as relays, fuses, and valves, for problems that may affect throttle valve operation.

Once the cause of the malfunction has been identified, the necessary repairs or replacement of parts must be carried out. If necessary, retest the system to ensure the problem is completely resolved. If you do not have experience in diagnosing and repairing vehicles, it is recommended that you contact a qualified auto mechanic or auto repair shop.

Diagnostic errors

When diagnosing DTC P1564, the following errors may occur:

• Incorrect error code reading: Incorrect reading of the error code or its incorrect interpretation may lead to the incorrect determination of the cause of the malfunction.
• Skipping key checks: The error may occur due to missing important diagnostic steps, such as checking the wiring, throttle position sensor, or engine control module.
• Misinterpretation of symptoms: Some symptoms may be misinterpreted or ignored, which can lead to misdiagnosis and inappropriate solutions.
• Malfunctions of diagnostic equipment: Using faulty or inadequate diagnostic equipment may result in incorrect data or incomplete diagnostic results.
• Insufficient experience and knowledge: Insufficient experience or knowledge in diagnosing automotive systems may lead to incorrect conclusions or erroneous repairs.
• Ignoring manufacturer's recommendations: Failure to follow or incorrectly follow the manufacturer's diagnostic and repair recommendations may result in missing important steps or incorrectly solving the problem.

To minimize diagnostic errors, it is important to have good training, experience and use high-quality diagnostic equipment. It is also important to follow the manufacturer's recommendations and diagnostic techniques for your specific problem.

How serious is the fault code? P1564?

Trouble code P1564 should be taken seriously, especially because it relates to throttle valve operation (or throttle control). The throttle valve plays a key role in controlling the airflow in the engine, which affects its operation and performance. Low voltage during a basic tune-up of this component can cause a number of problems, including rough running, loss of power, and rough idle. If the problem is not resolved, it can progress and lead to more serious consequences, such as a broken throttle body, additional damage to the engine management system, or even driving safety problems.

So, although the P1564 code is not critical in the sense that it does not cause the engine to stop immediately, it still requires careful attention and timely resolution to avoid further problems and keep the vehicle running safely and efficiently.

What repair will help eliminate the code? P1564?

Resolving trouble code P1564 will require several possible actions depending on the cause of the problem, some general steps that may help resolve this code are:

1. Replacing the Throttle Position Sensor (TPS): If the throttle position sensor is faulty or its output is not normal, it should be replaced with a new, working sensor.
2. Checking and servicing wiring and connectors: Check the condition of the wiring and connectors associated with the throttle position sensor and engine control module. Make sure connections are clean, intact and secure, and repair or replace them if necessary.
3. Checking and servicing the throttle valve: Check the mechanical condition of the throttle valve for sticking, blocking or other defects. If necessary, clean or replace it.
4. Checking and updating software: Check the engine control module software for updates or patches that may be available from the manufacturer. If you find problems with the software, update it to the latest version.
5. Checking other system components: Check other engine management system components, such as relays, fuses, wires and connections, for possible problems that may affect throttle valve operation.
6. Additional tests and diagnostics: If necessary, perform additional tests and diagnostics to identify hidden or additional problems that may be causing P1564.

After performing the appropriate repairs or replacing components, it is recommended that you retest the system to ensure that the problem has been resolved and that error code P1564 no longer appears. If you do not have experience or skill in automotive repair, it is recommended that you contact a qualified auto mechanic or service center.