P0455 KIA Code - EVAP Emission System Leak Detected Large Leak
Quick Answer
This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0455 KIA indicates EVAP Emission System Leak Detected Large Leak.
- Common causes
- Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P0455 KIA Description
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.
What are the Possible Causes of the DTC P0455 KIA?
- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking
How to Fix the DTC P0455 KIA?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0455 KIA code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0455 KIA Code
1. What are the common symptoms of OBDII code P0455 in a KIA?
- Common symptoms include the check engine light coming on, a strong smell of gasoline, and potential fuel economy issues.
2. What are the possible causes of OBDII code P0455 in a KIA?
- Possible causes include a loose or damaged gas cap, a faulty EVAP system purge valve, a cracked or damaged EVAP system hose, or a malfunctioning EVAP canister.
3. How serious is OBDII code P0455 in a KIA?
- While the code itself may not cause immediate drivability issues, it is important to address it promptly as it indicates a significant leak in the EVAP emission system, which can impact emissions and fuel efficiency.
4. Can a loose gas cap trigger OBDII code P0455 in a KIA?
- Yes, a loose or improperly sealed gas cap is a common cause of this code as it can allow fuel vapors to escape from the fuel tank.
5. How can I diagnose the source of a large EVAP system leak triggering OBDII code P0455 in my KIA?
- A smoke test can be performed to visually identify the leak in the EVAP system. Additionally, inspecting the gas cap, EVAP system hoses, purge valve, and canister for damage or wear can help pinpoint the issue.
6. Can I drive my KIA with OBDII code P0455 without causing further damage?
- It is generally safe to drive with this code, but addressing it promptly is recommended to prevent potential issues with emissions and fuel efficiency.
7. How can I repair OBDII code P0455 in my KIA?
- Repairing this code typically involves tightening or replacing the gas cap, inspecting and replacing damaged hoses, valves, or canisters in the EVAP system, and clearing the code with an OBDII scanner.
8. Is it possible for extreme weather conditions to trigger OBDII code P0455 in a KIA?
- Yes, extreme temperature changes can potentially affect the EVAP system components, leading to leaks and triggering this code.
9. Can a DIY enthusiast fix OBDII code P0455 in a KIA?
- Depending on the root cause, some DIY enthusiasts may be able to address this code by checking and replacing the gas cap, hoses, or valves. However, more complex issues may require professional diagnosis and repair.
10. How long does it typically take to repair OBDII code P0455 in a KIA?
- The repair time can vary based on the specific cause of the code and the availability of parts. In general, simple fixes like tightening a gas cap can be done quickly, while more complex repairs may take longer.
Discuss the causes and fixes for P0455 KIA OBDII Code
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Thank you to who ever maintains this site! You just saved me about $100.00 so I don't have to bring the car into the shop for a diagnostic!
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Did you fix your problem, if so, what was it and how did you fix it? I'm getting the same error code
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Hi i am having a similar issue and i was not using the stock gas cap. I am now, and was wondering if the check engine light will go off on its own or do i need to turn it off somehow?
I want to know if that was the issue or something more serious
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If the problems is fixed, the light will eventually turn off by itself, but it may take 3-4 days, depending on how you drive and how many times you start the engine.
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You could start by tighten the gas cap, and clear the code. You can clear the code with an OBDII scanner or by disconnecting the car battery for about 30 minutes. If the code comes back, then you may have to replace the cap.
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Thank you for your quick reply, i want to tell you that i recently replaced the fuel filter which is in the tank. However, since then i smell gas each time i refuel the car to full. i am wondering if this could be the matter?
Thanks a lot for your support. -
Definitely. You have a fuel smell and gas vapor leak code, then it's very likely that the fuel tank was not properly seal after the filter was replaced.
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Oh! thanks very much for your support, i'm going to take back to the service center. i am really glad i found this website.
Thanks a lot and best regards. -
Got a p0455 and p0451 code on 2011 kia soul have done replaced the gas cap, vent valve, and purge valve, still have both code started with one please help
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The most common problem when both codes set is the Purge Solenoid Valve. How long did it take for the code to come after you replaced the valve? other than the valve I have not seen any other component triggering both codes.
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I have this code on my 2011 kia sorento, it appeared after changing the purge valve, previously it was not a cause of check engine light. Could it be because of the faulty purge valve? I have changed the gas cap as recommended online but the engine light still there. How I can fix the problem?
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Double check the installation, either you didn't properly installed the purge valve or the valve is bad.
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Thank you for your prompt reply, I will take it to the mechanic and talk about it.
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I have a 2004 Kia Optima LX 2.7L - Displaying P0455 - Change fuel cap, replaced Purge Valve and Purge Solenoid. Cleared code. Still getting the error. Any suggestions?
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The P0455 code means that there is an EVAP system leak, since you have already replaced the most of common components, the next step is to perform smoke leak to determine exactly the leak is coming from.
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I HAVE A 2013 KIA OPTIMA IT WILL GO THEN AGAIN ITS HARD TAKE OFF THIS CODE POP UP ALONG WIT THE CHECK ENIGNE MY FUEL HOSE CAN EITHER BE DIRTY OR HAVE A LEAK SO I PUT GAS IN THE CAR ALONG WITH THE FUEL CLEANER
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I have a 2015 kia optima, did not pass emissions. The code came back as "P0455 EVAP emission system leak detected"
My check engine light has been on for a month or so now. I need to get this fixed asap -
Unfortunately there are several thing that could set the P0455 code. The code means that there is a large EVAP system leaking. The most common cause of the problem is a missing or loose fuel cap. Inspect the gas cap, make sure the gas cap is tight and has no damage, then clear the code. If the problem persist, then you need a technician to perform some test or use a smog machine to find the leak.
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