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Chuck Holt Posted on Nov 25, 2013
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P4056 Error code just came up.

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Lodhi Autos

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  • Toyota Master 992 Answers
  • Posted on Dec 26, 2013
Lodhi Autos
Toyota Master
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As far as I know there is no code number p4056 in the Toyota code book. It might be:
Error Code: P0456 Fault:
Evaporative Emission (EVAP) System - Small Leak Detected
Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Fuel Cap not fully attached.
Evaporative Emission (EVAP) System leaking/faulty.
Evaporative emission (EVAP) pressure sensor.
Possible Solutions:
Check Fuel Cap.
Check Evaporative Emission (EVAP) System.

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check all vacuum hose for cracks& evaporate canister
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