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What causes the P0455 code to appear in a Toyota Corolla?
The P0455 code is a diagnostic trouble code that indicates a large evaporative emission (EVAP) system leak. This code may appear in a Toyota Corolla due to the following reasons: a. Loose or damaged gas cap: If the gas cap is not tightened properly or has a damaged seal, it can cause a large leak in the EVAP system. b. Faulty vent or purge valve: A malfunctioning vent valve or purge valve can cause the EVAP system to fail in sealing the vapor properly. c. Cracked or damaged EVAP lines: Damaged or cracked EVAP lines or hoses can lead to leaks in the system. d. Leaking fuel tank or filler neck: Damage or corrosion in the fuel tank or filler neck can cause a large EVAP leak. e. Faulty EVAP canister: A damaged or leaking EVAP canister can cause the P0455 code to appear. To address these issues, it's essential to diagnose the root cause of the problem and make the necessary repairs or replacements.
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