Turbocharger/Supercharger Bypass Valve A Temperature Too High

Common symptoms

What you'll notice

• Check and clean the turbocharger/supercharger bypass valve to remove any dirt or debris that may be causing it to overheat.
• Inspect and replace any damaged or faulty wiring or connectors associated with the turbocharger/supercharger bypass valve.
• Verify and reprogram the engine control module (ECM) to ensure it is properly controlling the turbocharger/supercharger bypass valve.
• Inspect and repair any leaks in the intake system, as air leaks can cause the turbocharger/supercharger bypass valve temperature to rise.
• If all other solutions fail, consider replacing the turbocharger/supercharger bypass valve itself with a new one.

Common causes

Most likely first

1. Obstructed or dirty air filter
2. Faulty turbocharger/supercharger bypass valve
3. Restriction in the intake or exhaust system
4. Engine running excessively lean
5. Faulty engine temperature sensor

How to diagnose & fix

Work through it in order

1. Loss of power or reduced engine performance
2. Engine overheating
3. Engine misfires or stumbles
4. Whistling or squealing noise coming from the turbocharger
5. Increased exhaust smoke or unusual smell