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Acura DTC

Acura DTC P0457

Manufacture

Acura DTC

Code

P0457

Definition

Evaporative Emission (EVAP) System Leak Detected Fuel Fill Cap Loose or Missing

Description

Engine coolant temperature before EVAP purge control starts 140 ºF (60 ºC), 2 mph (2 km h), Barometric pressure, 76 kPa (22.5 in. Hg, 569 mmHg), Battery voltage 10.5 volts or more, fuel trim 0.73-1.47, system is in close loop. The execution time is continuous and the duration time is 12 seconds or more. The output from the fuel cap monitor is 0.053 or less for at least 12 seconds (when there is no NG judgment history in this drive cycle). P0455 or P0456 are judged as NG. NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.

Cause

  • Faulty fuel fill cap seal missing or damaged, fuel fill pipe damagedPoor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCMFaulty routing of the EVAP canister vent tubeFaulty EVAP canister vent shut valve

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