Turbo/Supercharger Wastegate Actuator Stuck Open
2011-2011 Mitsubishi Lancer 2.0L I4
The 2011 Mitsubishi Lancer is equipped with a 2.0L inline-4 engine. Below you'll find detailed p3004 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The wastegate actuator is stuck in the open position, preventing the turbo from building proper boost pressure.
Symptoms
- Check Engine Light
- No boost pressure
- Significant loss of power
- Engine feels naturally aspirated
- Poor acceleration at all speeds
Common Causes
- Wastegate actuator rod seized
- Actuator diaphragm ruptured
- Wastegate valve carbon buildup
- Vacuum line disconnected
- Actuator linkage broken
Diagnostic Steps
- Check wastegate actuator vacuum line
- Manually operate wastegate actuator rod
- Inspect actuator diaphragm for leaks
- Check for carbon deposits on wastegate valve
- Verify boost pressure with gauge
Repair Notes
Replace wastegate actuator. Clean carbon from wastegate valve and housing. Check turbo shaft play.
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
P3004 on Other Vehicles
Mitsubishi Colt JP
2005-2005 1.3L I4 4A90
Mitsubishi Colt JP
2005-2005 1.5L I4 4A91
Mitsubishi Colt JP
2006-2006 1.3L I4 4A90
Mitsubishi Colt JP
2006-2006 1.5L I4 4A91
Mitsubishi Colt JP
2007-2007 1.3L I4 4A90
Mitsubishi Colt JP
2007-2007 1.5L I4 4A91
Mitsubishi Colt JP
2008-2008 1.3L I4 4A90
Mitsubishi Colt JP
2008-2008 1.5L I4 4A91
Common Questions
What does code P3004 mean on a 2011-2011 Mitsubishi Lancer?
P3004 stands for "Turbo/Supercharger Wastegate Actuator Stuck Open". The wastegate actuator is stuck in the open position, preventing the turbo from building proper boost pressure.
What are the symptoms of P3004 on a Mitsubishi Lancer?
Common symptoms of P3004 include: Check Engine Light, No boost pressure, Significant loss of power, Engine feels naturally aspirated, Poor acceleration at all speeds.
What causes P3004 on a 2011-2011 Mitsubishi Lancer?
Common causes of P3004 include: Wastegate actuator rod seized, Actuator diaphragm ruptured, Wastegate valve carbon buildup, Vacuum line disconnected, Actuator linkage broken.
Last updated: March 2026