• Check Engine Light is on
• Reduced engine performance
• Unusual noises from the turbocharger
• Faulty turbocharger/supercharger bypass valve
• Wiring issues or short circuit in the control circuit
• Faulty Engine Control Module (ECM)
Turbocharger: A device that increases an engine's efficiency and power output by forcing extra air into the combustion chamber.
Bypass Valve: A valve that helps control pressure within the turbocharger system.
• P0034
• P0036
Turbocharger/Supercharger Bypass Valve A Control Circuit High
This code means that the car's computer detected a problem with the part that helps control the turbocharger, making it work too hard or not at all.
The P0035 code is triggered when the Engine Control Module (ECM) detects a high voltage condition in the turbocharger/supercharger bypass valve A control circuit.
The turbocharger/supercharger bypass valve is responsible for regulating the boost pressure in the engine. A 'high' circuit condition indicates that the voltage is above the expected range, which may mean the valve is stuck open, the wiring is shorted, or the control module is faulty.
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the wiring and connectors for damage or corrosion.
• Test the bypass valve for proper operation.
• Replace the faulty turbocharger/supercharger bypass valve.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Volkswagen Golf
• Regular maintenance of the turbocharger system.
• Inspect and clean electrical connections periodically.
• Avoid aggressive driving that may overwork the turbocharger.
Engine Performance
• Do not ignore the Check Engine Light; get it diagnosed promptly.
• Avoid high-speed driving until the issue is resolved.
• Consult a professional mechanic if unsure about repairs.
Check with your vehicle manufacturer; turbocharger components may be covered under powertrain warranty.
This code has been associated with turbocharged vehicles and often arises from electrical issues or valve failures.
Moderate – The vehicle may still be drivable, but performance could be compromised.
Ignoring this code can lead to further engine damage and decreased fuel efficiency.
• Engine running at operating temperature
• Turbocharger engaged and under load
The bypass valve is typically located near the turbocharger, often mounted on or near the intake manifold.
Q: Can I drive my car with a P0035 code?
A: It's possible to drive, but it's not recommended as it can lead to further damage.
Q: How does a turbocharger bypass valve work?
A: It helps regulate the amount of boost pressure in the engine by diverting excess pressure away from the turbocharger.
