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Randall C
Randall C, ASE Master Tech
Category: Chevy
Satisfied Customers: 12824
Experience:  ASE Master, L1, 32 years, Diagnostic / Electrical Specialist
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Chevrolet Impala I have a 2008 impala with trouble code p0455.

Resolved Question:

I have a 2008 impala with trouble code p0455. where do i start to look.
Submitted: 6 years ago.
Category: Chevy
Expert:  Randall C replied 6 years ago.

Tracer :

Hello, My name isXXXXX will do my best to assist you with your question

Tracer :

The code refers to large leak in the evaporative system. Little complex as the system has check valve, canister, hoses, etc however, the most common area when this code comes up is either loose gas cap, or bad gas cap

Tracer :

Diagnostic Aids

  • A loose, missing, incorrect, or damaged fuel fill cap may cause this DTC to set.

  • To help locate intermittent leaks, use the J 41413-200 Evaporative Emissions System Tester (EEST) to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with the J 41413-SPT High Intensity White Light. Introducing smoke in 15-second intervals will allow less pressure into the EVAP system. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.

  • To improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT.


I have a 2008 impala with a ob2 code 455, were do i start to look.

Tracer :

I sent the info. did you receive

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