EVAP System Leak Detected (Very Small Leak)
2007-2007 Mitsubishi Eclipse 2.4L I4
The 2007 Mitsubishi Eclipse is equipped with a 2.4L inline-4 engine. Below you'll find detailed p0456 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
A very small leak has been detected in the EVAP system. These are the hardest EVAP leaks to find.
Symptoms
- Check Engine Light
- Very slight fuel smell possible
Common Causes
- Gas cap seal worn
- Micro-crack in EVAP hose
- O-ring deterioration
- Charcoal canister hairline crack
- Fuel tank seal degradation
Diagnostic Steps
- Check and replace gas cap first
- Smoke test EVAP system at low pressure
- Inspect all hose connections
- Check canister and all seals
- May need to pressurize fuel tank
Repair Notes
Replace gas cap first. If code returns, smoke test is essential. Very small leaks can be time-consuming to locate.
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
P0456 on Other Vehicles
Mitsubishi 3000GT
1996-1996 3.0L V6 Twin Turbo
Mitsubishi 3000GT
1997-1997 3.0L V6 Twin Turbo
Mitsubishi 3000GT
1998-1998 3.0L V6 Twin Turbo
Mitsubishi 3000GT
1999-1999 3.0L V6 Twin Turbo
Mitsubishi Colt JP
2002-2002 1.3L I4 4A90
Mitsubishi Colt JP
2002-2002 1.5L I4 4A91
Mitsubishi Colt JP
2003-2003 1.3L I4 4A90
Mitsubishi Colt JP
2003-2003 1.5L I4 4A91
Common Questions
What does code P0456 mean on a 2007-2007 Mitsubishi Eclipse?
P0456 stands for "EVAP System Leak Detected (Very Small Leak)". A very small leak has been detected in the EVAP system. These are the hardest EVAP leaks to find.
What are the symptoms of P0456 on a Mitsubishi Eclipse?
Common symptoms of P0456 include: Check Engine Light, Very slight fuel smell possible.
What causes P0456 on a 2007-2007 Mitsubishi Eclipse?
Common causes of P0456 include: Gas cap seal worn, Micro-crack in EVAP hose, O-ring deterioration, Charcoal canister hairline crack, Fuel tank seal degradation.
Last updated: March 2026