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Alfa Romeo DTC

Alfa Romeo DTC P0456

Manufacture

Alfa Romeo DTC

Code

P0456

Definition

Evaporative Emission System Leak Detected (Very Small Leak)

Description

If no ESIM Switch closures were recorded and the accumulative timer has reached 70 hours of engine off time and 100 minutes of engine run time, it is determined that a small leak is present. This will take a minimum of 4 straight fail events. All other Evap system faults should be diagnosed before performing the small leak diagnostics.

Cause

  • Evap System Plumbing LeakCharcoal Canister LeakingFuel Tank Or Fuel Pump Seal LeakingEsim Mounting Seal LeakingEsim Internal Check Valves LeakingPurge Solenoid LeakingRestriction In The Canister Tube Between The Fuel Tank And Charcoal Canister

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