P1571 (Volkswagen, Audi, Skoda, Seat) Solenoid valve of the left electro-hydraulic engine mount - short circuit to positive
OBD2 Error Codes

P1571 (Volkswagen, Audi, Skoda, Seat) Solenoid valve of the left electro-hydraulic engine mount - short circuit to positive

P1571 – OBD-II Trouble Code Technical Description

Trouble code P1571 indicates a short to positive in the solenoid valve circuit of the left electro-hydraulic engine mount in Volkswagen, Audi, Skoda, Seat vehicles.

What does the fault code mean P1571?

Trouble code P1571 indicates a problem with the left electro-hydraulic engine mount solenoid valve in Volkswagen, Audi, Skoda and Seat vehicles. This valve controls the pressure in the hydraulic system, which keeps the engine in the correct position. When a system is shorted to positive, it means that the wiring or the valve itself is open or shorted to positive, which can cause the electrohydraulic engine mount system to malfunction or become completely inoperable. This may cause the engine to be misaligned, which may adversely affect engine performance and reliability.

Fault code P1571

Possible reasons

Possible causes of DTC P1571 include:

  • Damaged wiring: The wiring connecting the solenoid valve to the central unit or the vehicle's electrical center may be damaged, broken or corroded, causing a short to positive.
  • Damage to the solenoid valve: The solenoid valve itself may be damaged or internally shorted, causing it to malfunction and be outside the normal operating range.
  • Problems with the central unit: Malfunctions or malfunctions in the central unit that controls the electro-hydraulic suspension system or other vehicle systems can cause a short circuit to positive.
  • Short circuit in other components: Other electrical components, such as relays or fuses, may be damaged or shorted, causing the system to malfunction and causing trouble code P1571 to appear.
  • Mechanical damage: Mechanical damage such as shock or vibration can damage the wiring or the valve itself, causing a short circuit to positive.

To accurately identify the cause, it is necessary to conduct a detailed diagnosis of the electrical system and components associated with the left electro-hydraulic engine mount solenoid valve.

What are the symptoms of a fault code? P1571?

Symptoms for DTC P1571 may include the following:

  • Check Engine Light: The Check Engine light may illuminate on the instrument panel, indicating a problem with the electro-hydraulic engine mount system.
  • Uneven engine operation: If there is a short circuit to positive in the left electrohydraulic mount solenoid valve circuit, the system may not maintain the engine in the correct position, which may cause it to run unevenly or even rattle.
  • Unstable suspension operation: If the solenoid valve is shorted to positive, the left side engine mount may not function properly, resulting in unstable suspension or uneven weight distribution on the wheels.
  • Noises or knocking noises when driving: Incorrect engine position or uneven suspension operation may cause additional noise or knocking noises when driving, especially when driving over bumps or on uneven roads.
  • Failure of the stabilization control system: On some vehicles, the stability control system may be linked to the electro-hydraulic engine mount system. Therefore, activation of code P1571 may lead to failure or improper operation of the stability control system.

If you notice any of the above symptoms, it is recommended that you contact a qualified auto mechanic for further diagnosis and troubleshooting.

How to diagnose a fault code P1571?

To diagnose DTC P1571, follow these steps:

  1. Reading error codes: Using an OBD-II scanner, read the error codes from the vehicle's ECU (electronic control unit) to ensure that P1571 is indeed present and not a random error.
  2. Visual inspection: Inspect the wiring, connections and connectors associated with the left electro-hydraulic engine mount solenoid valve for damage, corrosion or breaks. Pay attention to places where the wiring may be mechanically damaged.
  3. Checking the solenoid valve: Using a multimeter, check the resistance of the solenoid valve. Typically, solenoid valves must have a certain resistance. If the resistance is too low or too high, it may indicate a problem with the valve.
  4. Checking the central unit: Check the central unit or control unit that controls the electro-hydraulic engine support system. Check it for corrosion, damage or breaks in the wiring.
  5. Signal check: Using a multimeter or oscilloscope, check for power signal at the solenoid valve. If there is no signal, this may indicate problems in the circuit or control unit.
  6. Checking other components: Check the condition of other system components such as relays, fuses and sensors that may be connected to the electro-hydraulic engine mount system.
  7. Software: Check the ECM software for updates or errors that could cause problems with the electro-hydraulic engine mount system.

If you are not confident in your diagnostic skills or do not have the necessary equipment, it is better to contact a professional auto mechanic or an authorized service center for further diagnosis and repair.

Diagnostic errors

When diagnosing DTC P1571, the following errors may occur:

  • Misinterpretation of symptoms: It can be a mistake to misinterpret the symptoms associated with the malfunction. For example, incorrectly explaining noises or vibrations due to a malfunction may lead to a misdiagnosis.
  • Incorrect component identification: An error may be misidentification or replacement of components that are not related to the problem. For example, replacing the speed sensor instead of the electrohydraulic engine mount solenoid valve.
  • Insufficient diagnosis: The error may be due to insufficient diagnosis of the components and systems associated with the problem. This may result in missing the root cause of the problem and resulting in incorrect repairs.
  • Use of inadequate equipment: Using inappropriate or inadequate diagnostic equipment may result in erroneous results or misinterpretation of data.
  • Wrong solution to the problem: An error may be the wrong choice of repair method or replacement of components, which does not eliminate the root cause of the problem.

To prevent these errors, it is necessary to carefully carry out diagnostics, following the manufacturer's recommendations, use the correct equipment and, if necessary, consult with an experienced specialist.

How serious is the fault code? P1571?

Trouble code P1571 can be serious, especially if it affects the operation of the electro-hydraulic engine mount system. This system plays an important role in maintaining the correct engine position and stabilizing the vehicle's suspension. A malfunction in this system can result in rough engine performance, road instability, poor handling, and even potentially dangerous driving situations.

Moreover, if the problem is a short to positive in the solenoid valve circuit, this may indicate a potential risk of fire or other serious damage to the vehicle's electrical system.

Therefore, it is recommended that you immediately contact a qualified technician to diagnose and repair the problem to avoid further problems and ensure the safety and reliability of your vehicle.

What repair will help eliminate the code? P1571?

Resolving trouble code P1571 may require several steps depending on the specific cause:

  1. Replacing the solenoid valve: If the problem is related to a faulty solenoid valve itself, then replacement may be necessary. The new valve must be installed according to the manufacturer's instructions.
  2. Repair or replacement of wiring: If the cause is damaged wiring or connectors, then repair or replace the damaged areas. This may include rewiring or repairing connectors.
  3. Checking and repairing the central unit: If the problem is due to a faulty central control unit, it may need to be repaired or replaced. This is a complex procedure that usually requires specialized equipment and experience.
  4. Updating the software: In some cases, the problem may be due to errors in the ECU software. In such cases, the manufacturer may release a firmware update that may resolve the issue.
  5. Checking and replacing other components: The problem may be caused not only by the solenoid valve, but also by other components in the system. Therefore, other components such as sensors, relays or fuses may need to be checked and, if necessary, replaced.

In any case, it is recommended that you contact a qualified auto mechanic or an authorized service center to diagnose and repair the problem. Improper repairs can lead to further problems and damage to the vehicle.

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