What are the Possible Causes of the DTC P0457 Hyundai?
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Damaged, missing or loosely installed fuel filler cap
⚠ Does your Hyundai have Safety Recalls? → Check here
How to Fix the DTC P0457 Hyundai?
Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
Check for a loose, missing or damage fuel filler the cap.
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0457 Hyundai code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
When is the Code Detected?
EVAP control system has a very large leak such as fuel filler cap fell off
What are Code Possible Symptoms?
Engine Light ON (or Service Engine Soon Warning Light)
A noticeable fuel odor may result from fuel vapor release
Fuel cap indicator lamp (FCIL) may be illuminated.
Code P0457 Hyundai Description
This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. If pressure does not increase, the Engine Control Module (ECM) will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid valve under the following vacuum test condition.
The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.
P0457 Hyundai Code - EVAP Emission System Leak Detected Tank Cap Loose/Off
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