Turbo/Supercharger Bypass Valve Control Circuit
2001-2005 BMW 325i E46 2.5L I6
Description
The turbo bypass valve (diverter valve/blow-off valve) control circuit has a malfunction. The bypass valve recirculates pressurized air during throttle closure.
Symptoms
- Check Engine Light
- Compressor surge on deceleration
- Flutter noise from turbo
- Reduced boost response after throttle lift
- Check Engine Light after spirited driving
Common Causes
- Faulty bypass valve solenoid
- Torn bypass valve diaphragm
- Wiring issue to solenoid
- Vacuum line leak
- PCM driver failure
Diagnostic Steps
- Test bypass valve solenoid resistance
- Inspect vacuum lines to bypass valve
- Command solenoid with scan tool
- Check valve diaphragm for tears
- Inspect wiring and connector
Repair Notes
Replace bypass valve or solenoid. Inspect vacuum hoses for cracks.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P3008 on Other Vehicles
Common Questions
What does code P3008 mean on a 2001-2005 BMW 325i E46?
P3008 stands for "Turbo/Supercharger Bypass Valve Control Circuit". The turbo bypass valve (diverter valve/blow-off valve) control circuit has a malfunction. The bypass valve recirculates pressurized air during throttle closure.
What are the symptoms of P3008 on a BMW 325i E46?
Common symptoms of P3008 include: Check Engine Light, Compressor surge on deceleration, Flutter noise from turbo, Reduced boost response after throttle lift, Check Engine Light after spirited driving.
What causes P3008 on a 2001-2005 BMW 325i E46?
Common causes of P3008 include: Faulty bypass valve solenoid, Torn bypass valve diaphragm, Wiring issue to solenoid, Vacuum line leak, PCM driver failure.