P0035 Fault Code

Turbo Charger Bypass Valve Control Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0035 fault code refers to a problem with the turbocharger bypass valve control circuit. The turbocharger bypass valve is responsible for redirecting the excess pressurized air from the turbocharger back into the intake system when it is not needed. This fault code indicates that there is a high voltage reading in the control circuit of the bypass valve.

There are several possible causes for this error. It could be a faulty bypass valve, a short or open circuit in the wiring harness, or a problem with the engine control module (ECM). Electrical issues, such as corrosion or loose connections, can also contribute to this fault code.

To diagnose and fix the problem, it is recommended to follow these steps:

1. Inspect the wiring harness and connectors for any damage, corrosion, or loose connections. Repair or replace as necessary.
2. Test the turbocharger bypass valve to ensure it is functioning properly. If faulty, replace it.
3. Check the voltage and ground signals at the bypass valve connector using a multimeter. If the voltage reading is unusually high, it may indicate a problem with the ECM. In this case, further diagnostic procedures may be required to identify and repair the issue with the ECM.
4. Clear the fault code using a diagnostic scanner and test drive the vehicle to see if the code returns. If it doesn't, the issue may have been resolved. However, if the code reappears, further diagnosis may be necessary.

It is important to address this issue promptly as a malfunctioning turbocharger bypass valve can affect the performance and efficiency of the engine. If you are not familiar with automotive electrical systems, it is recommended to seek assistance from a qualified mechanic or dealership for diagnosis and repair.

What are the symptoms of the P0035 code?

The P0035 fault code typically indicates a problem with the turbo charger bypass valve control circuit being high. Some common symptoms of this fault code on cars may include:

• Check Engine Light (CEL) or Malfunction Indicator Lamp (MIL) illuminated on the dashboard.
• Reduced engine power or loss of power during acceleration.
• Poor engine performance or lack of turbocharger boost.
• Increased fuel consumption.
• Rough idle or stalling of the engine.
• Possible black smoke or unusual exhaust emissions.

It is important to note that these symptoms can vary depending on the make and model of the vehicle. If you are experiencing any of these symptoms, it is recommended to have the vehicle diagnosed and repaired by a qualified mechanic to determine the exact cause of the fault code.

What causes the P0035 code?

The P0035 fault code on cars is related to the turbocharger bypass valve control circuit. This code indicates that there is a high voltage condition in the control circuit of the turbocharger bypass valve. The possible causes for this fault code include:

1. Faulty turbocharger bypass valve
2. Short or open circuit in the wiring harness of the bypass valve control circuit
3. Poor electrical connection in the bypass valve control circuit
4. Faulty engine control module (ECM)

It is recommended to diagnose the issue further by checking the wiring, connections, and functionality of the turbocharger bypass valve. If necessary, consult a professional mechanic or authorized service center for proper diagnosis and repair.

How to fix P0035?

P0035 fault code indicates a problem with the turbocharger bypass valve control circuit. Here are some steps to diagnose and fix this issue:

1. Check the wiring: Inspect the wiring harness and connectors associated with the turbocharger bypass valve control circuit. Look for any signs of damage, such as frayed wires or loose connections. Repair or replace any faulty wiring.

2. Test the circuit: Use a multimeter to test the voltage and resistance in the turbocharger bypass valve control circuit. Compare the readings to the manufacturer's specifications. If the voltage is abnormally high, it suggests a problem with the circuit.

3. Inspect the turbocharger bypass valve: Check the condition of the bypass valve itself. Look for any signs of damage, such as corrosion or wear. Clean or replace the valve if necessary.

4. Check for vacuum leaks: Examine the vacuum lines connected to the turbocharger bypass valve. Inspect them for cracks, leaks, or loose connections. Repair or replace any faulty vacuum lines.

5. Inspect the turbocharger: A malfunctioning turbocharger could cause issues with the bypass valve control circuit. Check the condition of the turbocharger, including the impeller and shaft. Repair or replace the turbocharger if needed.

6. Reset the fault code: Once you have addressed the underlying issue, clear the fault code using an OBD-II scanner. Resetting the code will turn off the check engine light.

If the P0035 fault code persists after following these steps, it is recommended to consult a professional mechanic or dealership for further diagnosis and repair.