How To Fix Honda P0457 Evaporative Emission System Leak Detected Fuel The p0457 code stands for “evaporative emission system leak detected (fuel cap loose off)”, which means your power control module (pcm) has detected a leak in your evaporative emission control system (evap). a cracked gas cap, damaged seal, and a broken fuel filler neck are some of the possible causes of the p0457 code. A loose, damaged or missing gas cap is the most common cause of a fuel vapor leak. thankfully, it’s also the easiest to fix. tighten or replace your gas cap, reset the code and check to see if your p0457 trouble code returns. if it does, turn to one of the more complex repairs. another common issue is a cracked vacuum canister.
P0457 Code Evaporative Emission System Leak Detected Fuel P0457 definition: evaporative emission (evap) control system leak detected. issue severity: moderate – extended driving with this code may cause internal engine damage. repair urgency: get this code fixed as soon as possible. diagnosis: although there are no immediate drivability issues of the trouble code p0457, this is the largest vacuum. However, specific troubleshooting steps will vary depending on the vehicle. diagnostic trouble code (dtc) p0457 relates to a vacuum leak in the evaporative emission system used to prevent fuel vapor leaks into the atmosphere. codes p0456 and p0455 are similar codes that refer to the degree of vacuum leaks from smallest to largest. P0455 simply means the car computer has detected a large leak in the evap system. p0457 also means the system has detected a leak. the most common cause of the p0457 code is a loose, damaged, or missing fuel cap. this can allow fuel vapors to escape the fuel tank, triggering the check engine light. replace the gas cap and hit road for 45 to 60. The p0457 code is a generic powertrain code that indicates a leak in the evap system. specifically, it signifies that there is a large leak detected in the system, usually due to a loose or damaged fuel cap, or a problem with the evap system's components. the evap system is responsible for capturing fuel vapors from the fuel tank and sending.
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