Sep 29, 2010 · Here is how to reset your code: To reset your engine codes: Remove the negative terminal of your battery (10mm wrench). Turn your ignition key to START and hold it there for about 15 seconds. Turn your ignition key to OFF and remove it. Connect the negative terminal of your battery. Start but do not hit the throttle. Aug 30, 2017 · P0456 code (small leak evap) bought a new MOPAR fuel cap from the dealer. I drove the jeep about 60 miles hoping it would reset the code. I ended up disconnecting the battery. I noticed the 90 degree rubber connector that comes off the intake had a very small crack. I put a hose clamp on it but I would like to replace it. There are many fixes for the P0456 (small/possible leak detected in evap system). I was able to find and fix the one on my Jeep. I waited about a month befor...P0457 is a somewhat common trouble code with the Jeep Grand Cherokee. This code references a number that is given to you when you plug your Grand Cherokee into a OBDII scanner. P0457 Indicates that there is a leak in the Evaporative Emission Control (EVAP) System. It is similar to P0455 (large leak) and P0456.Vehicles affected by service bulletin 25-002-15 REV. B. 2015 (WK) Jeep Grand Cherokee 2015 (WD) Dodge Durango The bulletin further applies to vehicles built on or after November 16, 2014 (MDH 1116XX) and on or before January 17, 2015 (0117XX).. Fix for evaporative emissions codes on Jeep and Dodge. If your build date and VIN matches …Aug 24, 2020 · Get a Fog Machine here https://amzn.to/31loyu7In Canada get a Fog Machine here https://amzn.to/31n41FG Steve's Jeep Wrangler JKU is having a intermittent iss... 80 posts · Joined 2010. #1 · Aug 30, 2010. I have a 2002 Apex Edition Wrangler. The check engine light came on a few weeks ago and I have been trying to figure out where the problem is. The codes are P0455 and P0456. They told me that it could be my gas cap, so I bought a new one and got the codes cleared. about a 5 days later, it came back on.Nov 17, 2019 · In this video will be diagnosing an EVAP system leak on a Jeep Wrangler. p0442 small evap leak, P0445 indicates that there is improper purge flow, EVAP Syst... Oct 16, 2015 ... P0456 EVAP System Small Leak Jeep Commander repaired by replacing gas cap.The P0456 code in your Jeep is a diagnostic trouble code (DTC) relating to the vehicle’s Evaporative Emission Control (EVAP) system. The EVAP system is designed to prevent harmful vapors from the fuel tank from escaping into the atmosphere. When your vehicle generates the P0456 code, it indicates that there’s a small leak in this system ... May 17, 2019 · Evap systems will vary by year & model. I had p0455, p0456, & p0457 codes for the longest time until I pulled the passenger rear inner fender to mount a shock reservoir. That's where I found the Evap Canister and the Evap Leak Detection Assembly. One of the Vapor Lines had a huge crack in it. slickrock steve. Feb 3, 2011 · The P0456 code is indeed a leak detected somewhere in the EVAP system. That system catches the fuel vapors from the fuel tank and reroute them to the engine inlet to burn them off. The purge solenoid controls the flow of vapors (or in fact the PCM controls it by pulsing the purge solenoid) Frank. JEEP Grand Cherokee 4.7 Lmtd 2004:thumbsup: Aug 16, 2011 · 376 posts · Joined 2010. #8 · Aug 17, 2011. Loosen or cut the battery terminal nut or bolt (s)and gently tap on the side of the terminal with a hammer to start a twisting motion of the connector on the battery terminal. It is a common instruction to remove the negative battery terminal on MANY other service procedures. P0455 indicates a large leak in the evaporative emission control system. (EVAP). There are different leak size codes. For example, P0456 means your Patriot has a small EVAP leak. While the trouble code may state that there is a “large leak” in the EVAP system of your Jeep Patriot, the actual leak will most likely still look relatively small.Purge valve location in a 2015 Jeep Cherokee Limited. Replacing this valve fixed my P0456 error code.Jeep TSB 18-093-19 Make: Jeep Number: 18-093-19 Title: Flash: Powertrain Control Module (PCM) Updates Date: 11/6/2019 Models: ... (DTCs) have been set: P0456 - EVAP System Small Leak; P06EF - Engine Restart Performance. If DTC P0456 is present use the wiTECH Small Leak Verification test (SLVT) to determine if a leak is present in the system.Today at the shop we had a 2017 Jeep Patriot in for a check engine light with a P0456 code. We go through testing procedures to find out the culprit. It ende... December 8, 2023 by Jason. P0456 Indicates a small leak in the Jeep Grand Cherokee’s evaporative emission control (EVAP) system. While the trouble code may …Kod P0456 może mieć jeden lub więcej z poniższych przyczyn: Brak lub poluzowany korek wlewu paliwa. Zastosowano nieprawidłowy korek wlewu paliwa. Korek wlewu paliwa pozostaje otwarty lub nie zamyka się. Ciała obce zatrzymane w korku wlewu paliwa. Wycieki z pojemnika EVAP lub zbiornika paliwa. Nieszczelny wąż układu EVAP.For MORE great Auto Repair Videos, visit us at www.OnlineAutoRepairVideos.com Video on how to diagnose dtc p0456 evap system leak detected very small leak on...Today we look at how to fix the check engine light caused by code P0456, P0240, P0442, P0440 for your 97-06 jeep wrangler tj, which most of them are a small... The Jeep 4.0-liter engine uses a cast iron block and cylinder head. It comes in both an inline-6 and inline-4 cylinder version and the specifications vary, depending on the vehicle...T. twingler Discussion starter. 23 posts · Joined 2012. #6 · Jul 22, 2012. Well suddenly the "check gas cap" notice has gone away. I cleared the code (P0456) with my ODBII scanner, but the message was still there. But after about a week - it seems to have gone away. So far so good, maybe it was worth the $30 OEM cap.2 posts · Joined 2013. #2 · Mar 25, 2014. Well, I hate to admit this is my first post, but it is. I have what appears to be the exact same issue. I have a 2014 GC SRT, and about 1800 miles on it. The MIL came on, P0456 is the error, and the dealership says they see nothing wrong. Cleared, and came back on 2 days later.A quick and easy guide to replacing the ESIM Module in a 2018 Jeep Grand Cherokee. You can order the same product I used here:ESIM Module for a Jeep Grand C...Dec 15, 2017 · What's going on guys! TheValleyofAwesome here and today I brought a special video for the folks out there struggling with the P0456 small emissions leak like... Jun 27, 2022 ... How smoke machine helps find leak in the evap system.Aug 18, 2023 · The P0456 code refers to a potential leak detected in the evaporative emission system of your Jeep Patriot. This system captures and stores fuel vapor that would otherwise escape into the atmosphere, contributing to air pollution. If there’s a leak, fuel vapor escapes when it shouldn’t, increasing harmful emissions. Apr 25, 2019 · DavidAaa. 2 posts · Joined 2020. #11 · Jan 18, 2020. The P0456 code (very small EVAP leak) was caused by the EVAP purge valve on my 2015 JGC Overland, $20 part (P/N CP796). After replacing the leak sensor and o-ring like the web suggested it did not fix the issue. Smoke test also did not show any issue. Today at the shop we had a 2017 Jeep Patriot in for a check engine light with a P0456 code. We go through testing procedures to find out the culprit. It ende... MIL Code P0456 - Evap Leak. My 2016 Wrangler JK just threw up a “Evap Emission Control System Leak (Small)” code. I know this can be a range of things in the evap system but I wanted to see if anyone has had that happen before and what it ended up being/the price to fix it. Reading online it says it’s a minor issue that should be fixed ...Sep 15, 2023 · The Ins and Outs of the P0456 OBD2 Code What is the P0456 Code? The P0456 fault code points to an issue with a small leak in the EVAP system. It can be caused by several faulty components, like the charcoal canister, the EVAP hoses, and lines, or the EVAP vent valve. A small EVAP leak can be a result of a faulty or loose fuel cap. 4 posts · Joined 2017. #1 · Apr 27, 2023. 2008 JK Wrangler X 4wd Auto. So, I was chasing the P0456 Evap System Small Leak code... and figured out it was the K&N standard air filter (red). I got the code, cleaned my gas cap, turned it no fewer than 5 clicks. Then Changed the Purge Solenoid.The P0456 Jeep code means that the EVAP system has detected a small leak and needs to be fixed. The web page explains the possible causes, symptoms, diagnosis, …Mar 28, 2019 ... My jeep failed inspection, it has a P0456 code - small Evap leak. It's not the gas cap, got a smoke test but didn't show any leaks.The vehicle had a P0456 evap small leak detected DTC. Replaced ESIM as that is a common repair on Identifix. EVAP monitor would not reset after ESIM replacem...Jan 10, 2020 ... P0456 EVAP SMALL LEAK '07 JEEP LIBERTY 3.7l DIAG. & FIX (JEEP, CHRYSLER, DODGE )PURGE SOLENOID, SMOG Evap purge valve test and diagnostics ...2006 Jeep Commander Sport 65th Anniversary Edition Green; 3.7L V-6-QT-I 4WD; 119,490 Miles. Save Share. Like. Sort by Oldest first Oldest first Newest first Most reactions. ... P0454, P0456, P0457, P0458, and P0459. Symptoms You likely won't notice any drivability problems.Feb 11, 2024 · Causes Of P0456 Jeep Grand Cherokee Code: Several causes are responsible for the display of code P0456. Sometimes the code appears due to a technical glitch, while in most cases, the code indicates probable leakage in the EVAP system, which needs to be addressed as soon as possible. Usually, a broken gas cap or a loose fitting is the main culprit. Quick one on a Jeep with a evap leak code. NVLD system, just purely checking for a leak. Not checking NVLD switch function, which it did work and I edited ou...P0456 code definition. Evaporative Emissions System Small Leak Detected. What the P0456 code means. P0456 is an OBD-II generic code that the engine control module (ECM) has detected a very small leak in the evaporative system during the vehicle off testing. The test has to fail twice in a row to cause the code to be activated by the ECM.To diagnose the P0456 Jeep 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. What is engine code P0456 in a Jeep? The engine code P0456 in a Jeep refers to a diagnostic trouble code that indicates a small leak in the evaporative emissions system. …What is engine code P0456 in a Jeep? The engine code P0456 in a Jeep refers to a diagnostic trouble code that indicates a small leak in the evaporative emissions system. …OBDII Codes Engine Light Definitions Diagnostic Repair | AutoCodesJeep TSB 18-088-18 Make: Jeep Number: 18-088-18 Title: Flash: Powertrain Control Module (PCM) Updates Date: 7/16 ... (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC): P0456 - EVAP System Small Leak. Customers may also describe the following condition: Excessive fan ...The DREADED CHECK your GAS CAP message on your JEEP EASY FIX code PO456, evap code, gas cap, gas smell, In this video i will show you how to fix that dreaded...Dec 15, 2017 · What's going on guys! TheValleyofAwesome here and today I brought a special video for the folks out there struggling with the P0456 small emissions leak like... for several months I get a occasion CEL which comes on and usually stays on for several days, I have a code reader and repeatedly have gotten just code P0456 and have cleared it out which last for a bit and then it just comes on again whenever. No problem with how the jeep runs this is a 2000 XJ all stock powertrain 123K.Purge valve location in a 2015 Jeep Cherokee Limited. Replacing this valve fixed my P0456 error code.Nov 2, 2011 · TSB 18-010-02 Is a PCM replacement correct an erroneous MIL illumination for SAE P0456 that sets when driven on steep grades. Click to expand... P0442 (M) Evaporative Emission Control System Leak Detected (medium leak) A 0.040 leak has been detected in the evaporative system. (A faulty gas cap may cause this code). Also see TSB 25-001-02A. Hey all! I drive a 18 JLU with the 3.6L. Got in my Jeep this morning and engine light came on. Went and got it tested and it was pulling code P0456 (Evap Emission System Leak Detected, Very small leak). I did replace the aux battery about a week or 2 ago. Any ideas on what this could be? As...Jan 10, 2020 ... P0456 EVAP SMALL LEAK '07 JEEP LIBERTY 3.7l DIAG. & FIX (JEEP, CHRYSLER, DODGE )PURGE SOLENOID, SMOG Evap purge valve test and diagnostics ...Feb 1, 2022 · The first and most common cause for the P0456 fault code is a disconnected hose or a crack in the evaporative emissions system. To trigger the P0456 code, the leak doesn’t need to be large, but just enough to alter the pressure in the system. It can be a hairline crack in the evaporation hose or a faulty connection between the hose and the ... Aug 26, 2023 · What Is The P0456 Jeep Code? The P0456 Jeep code is a diagnostic trouble code (DTC) that indicates a small leak in the evaporative emission control (EVAP) system. This system is responsible for capturing gasoline vapors and preventing them from being released into the atmosphere. Definition of the P0456 Jeep Code 1 post · Joined 2022. #9 · Jul 1, 2022. I had this issue with my 2015 Jeep Renegade and had to replace the filler neck because of it is loose it can leak fuel and yes it will cause an small EVAP leak code P0456. I am still having the light come on even though the filler neck has been replaced and the sensor itself.Jeep TSB 18-093-19 Make: Jeep Number: 18-093-19 Title: Flash: Powertrain Control Module (PCM) Updates Date: 11/6/2019 Models: ... (DTCs) have been set: P0456 - EVAP System Small Leak; P06EF - Engine Restart Performance. If DTC P0456 is present use the wiTECH Small Leak Verification test (SLVT) to determine if a leak is present in the system.Jeep JKU P0456 Easy Fix. Get a Fog Machine here https://amzn.to/31loyu7 In Canada get a Fog Machine here https://amzn.to/31n41FG Steve's Jeep Wrangler JKU …JEEP COMPASS RENEGADE CODE P0455 P0456 EVAP PURGE SYSTEM LEAKIf you have a Jeep Compass or Jeep Renegade and you have engine light on and code P0455 or code ...After I smoked this Jeep I found that the EVAP System Integrity Module (ESIM)/Vapor Leak Detection Pump had a crack in it causing the P0456 small leak code.H...May 18, 2018 · OBD Code P0456 - Evaporative Emission Control System Leak Detected. I am getting the the following code on my 2016 Renegade Trailhawk with 38k miles: P0456 - Powertrain: Evaporative Emission Control System Leak Detected (very small leak, check fuel cap, piping, etc). I pulled the code from my OBDLink MX scantool and Torque App. Every time the CEL will come on and it's P0456. Last time I had it in the shop, he told me the fuel filler neck was not making contact with the seal on the gas gap and he tried other gas caps with no luck. He asked if i ever had the fuel filler neck replaced, etc. I bought mine new and never had did anything to it.My lady's father backed the car right into my spare 315/75r16 and dented his trunk nicely. Ahhhh whatta dumbass. Can't see how this would cause P0456 to be thrown though!!) 94,000+ miles to date, but these aren't real miles courtesy of the gearing and lack of speed-sensor adjustment. Thanks, Keith. '04 auto Roob.Oct 23, 2013 · 5465 posts · Joined 2012. #4 · Oct 23, 2013. If you are 100% positive that it's not the cap (i bet it is) then you have a large evap leak somewhere. Lots of good info on the web, 99% point to a bad cap. P0457 Jeep EVAP System Loose Fuel Cap OBDII Engine Light Trouble Code | Engine-Codes.com. Like. The Jeep P0456 code means that the pressure has been detected in the EVAP system. The Jeep EVAP system is responsible for collecting and storing fuel vapors from the fuel system. The vapors are then purged into the engine to be burned off. If the pressure in the system is too low, it will cause the Jeep P0456 code to be triggered.Usually this P0456 Jeep code is caused by an incorrect or faulty gas cap. Filling the fuel tank with the engine running could conceivable cause this code as well or if the cap wasn’t properly tightened. Any of the following could also be the cause: A small leak in any of the EVAP hoses or fuel tank hoses A small leak in the purge valve or ...P0456 Dodge EVAP System Small Leak 📷. P0456 Ford EVAP System Leak Detected Gross Leak/No Flow 📷. P0456 GMC EVAP Control System Leak Detected Very Small Leak 📷. P0456 Honda EVAP System Large Leak Detected 📷. P0456 Hyundai EVAP Emission System Leak Detected Very Small Leak 📷.The check engine light came back on the Jeep SRT. P0456 and P0400. In this video we replace the ESIM to attempt to fix the check engine light! Thanks for wat...If your check enging light come on again for this code, WARNINGS. UPDATE P0456 VIDEO HERE: https://www.youtube.com/watch?v=vugdjkZlZkM&list=UUSIdv7pEKV2jxJvI...Feb 1, 2022 · The first and most common cause for the P0456 fault code is a disconnected hose or a crack in the evaporative emissions system. To trigger the P0456 code, the leak doesn’t need to be large, but just enough to alter the pressure in the system. It can be a hairline crack in the evaporation hose or a faulty connection between the hose and the ... Vehicles affected by service bulletin 25-002-15 REV. B. 2015 (WK) Jeep Grand Cherokee 2015 (WD) Dodge Durango The bulletin further applies to vehicles built on or after November 16, 2014 (MDH 1116XX) and on or before January 17, 2015 (0117XX).. Fix for evaporative emissions codes on Jeep and Dodge. If your build date and VIN matches …Pulled a P0456 CEL that was not fuel cap related and I couldn't reset. Took it to the dealer and they found a failed ESIM (Evaporative Systems Integrity Module). Just posting so others will know one of the causes for a P0456 other than a loose fuel cap. Apparently STAR S18250000025 is another cause. Sponsored ----geospyder (Jim) …When a Jeep Wrangler engine code P0456 is present, it means that the pressure in the evaporative emissions (EVAP) system is too low. The EVAP system is responsible for collecting and storing fuel vapors from the fuel tank and preventing them from entering the atmosphere. A Jeep Wrangler with a P0456 code will typically have a hard …When you need to locate a dealer that sells or services Jeep vehicles, there are a few ways to find one. You can search through the Jeep website, a partner website, online sources ...this could be the issue when you're getting the p0456 code. brittle plastic tubing that is cracked or broken. did a temporary fix on mine by wrapping electri...DavidAaa. 2 posts · Joined 2020. #11 · Jan 18, 2020. The P0456 code (very small EVAP leak) was caused by the EVAP purge valve on my 2015 JGC Overland, $20 part (P/N CP796). After replacing the leak sensor and o-ring like the web suggested it did not fix the issue. Smoke test also did not show any issue.This is a video I took after replacing the Purge Valve Hose on my 2018 Jeep Grand Cherokee. Ran the codes on after seeing my check engine light. Code - P0456...A failure to maintain the correct fuel tank pressure results in trouble code P0456. This means that a leak is allowing vapors to escape, either directly from the fuel tank or from related hoses and parts. What are the Symptoms of P0456? It’s unlikely that you’ll notice any changes in the normal operation of your vehicle. The first sign of a trouble code P0456 …May 18, 2018 ... I am getting the the following code on my 2016 Renegade Trailhawk with 38k miles: P0456 ... Jeep Renegade General Discussion. Posted by Jeepetto ...The vehicle had a P0456 evap small leak detected DTC. Replaced ESIM as that is a common repair on Identifix. EVAP monitor would not reset after ESIM replacem...I have a P0456 that will come on only after my 2009 2.4l Patriot after it has sat out overnight or a few days when there is heavy rain (1 or more inches of rain). High humidity or light rain does not seem to set the code. It does not come on if I am driving in the heavy rain. -visually checked the lines in the engine compartment and at the ...Le code d’anomalie de diagnostic OBD2 P0456 indique qu’une fuite a été détectée dans le système de commande des émissions par évaporation (EVAP). Le système de commande des émissions par évaporation (EVAP) permet de réduire les fuites de vapeur du système de carburant dans l’atmosphère. Par le biais de tuyaux et de tubes, un ...Oct 21, 2020 ... ... P0456 in the easiest, quickest, and cheapest way. 2 practical solutions ... 2010 Jeep Wrangler Evap Leak - How to Find, How to Fix, & How to ...
18-089-19 Jeep Technical Service Bulletin. wiTECH Small Leak Verification Test (SLVT) - P0456-EVAP SYSTEM SMALL LEAK. Cherokee 75th Anniversary Edition. Cherokee 80th Anniversary Edition. Cherokee High Altitude.. How much is 100 rupees in american money
My lady's father backed the car right into my spare 315/75r16 and dented his trunk nicely. Ahhhh whatta dumbass. Can't see how this would cause P0456 to be thrown though!!) 94,000+ miles to date, but these aren't real miles courtesy of the gearing and lack of speed-sensor adjustment. Thanks, Keith. '04 auto Roob.Feb 12, 2022 ... Share your videos with friends, family, and the world.I have a P0456 that will come on only after my 2009 2.4l Patriot after it has sat out overnight or a few days when there is heavy rain (1 or more inches of rain). High humidity or light rain does not seem to set the code. It does not come on if I am driving in the heavy rain. -visually checked the lines in the engine compartment and at the ...Nov 17, 2019 ... In this video will be diagnosing an EVAP system leak on a Jeep Wrangler. p0442 small evap leak, P0445 indicates that there is improper purge ...kerno Discussion starter. 151 posts · Joined 2011. #1 · Sep 29, 2011. P0455 Large evap system leak - found it! also P0454, P0456. Several people have posted that they were unable to find the cause of the code. According to the factory diagnosis manual, the code gets set when the system determines that there is a leak greater than .080 …This video is sort of my 2 cents on how I solved my Jeep, Rocky's, P0456 check engine light code. *To be very clear, this is NOT a DIY video or a how-to. Follow anything in this video at …There are many fixes for the P0456 (small/possible leak detected in evap system). I was able to find and fix the one on my Jeep. I waited about a month befor...Jeep JKU P0456 Easy Fix. Get a Fog Machine here https://amzn.to/31loyu7 In Canada get a Fog Machine here https://amzn.to/31n41FG Steve's Jeep Wrangler JKU …MIL Code P0456 - Evap Leak. My 2016 Wrangler JK just threw up a “Evap Emission Control System Leak (Small)” code. I know this can be a range of things in the evap system but I wanted to see if anyone has had that happen before and what it ended up being/the price to fix it. Reading online it says it’s a minor issue that should be fixed ...Today we look at how to fix the check engine light caused by code P0456, P0240, P0442, P0440 for your 97-06 jeep wrangler tj, which most of them are a small...188 posts · Joined 2008. #1 · Aug 16, 2011. My '02 WJ has a CEL, P0456. I replaced the gas cap. Assuming that the new gas cap fixed the evap leak, how long before the CEL clears on its own? I do not have an OBDII scan gauge so I cannot manually delete the CEL. I tried to disconnect the battery but the connectors are on so tight I dont want to ...Jan 4, 2023 ... Today at the shop we had a 2017 Jeep Patriot in for a check engine light with a P0456 code. We go through testing procedures to find out the ...See full list on offroadingpro.com Nov 2, 2011 · TSB 18-010-02 Is a PCM replacement correct an erroneous MIL illumination for SAE P0456 that sets when driven on steep grades. Click to expand... P0442 (M) Evaporative Emission Control System Leak Detected (medium leak) A 0.040 leak has been detected in the evaporative system. (A faulty gas cap may cause this code). Also see TSB 25-001-02A. P0456-EVAP PURGE SYSTEM SMALL LEAK. Theory of Operation The theory behind the Natural Vacuum Leak Detection (NVLD ... TEA ported/milled heads, 20 in. SRT Reps. Also 05 5.7 Magnum modded the same as Jeep and, Recently Sold, 06 300CSRT8, Comp. Cam, 85 mm TB, HP tuned engine/trans, Foose custom wheels. …P0456 Dodge EVAP System Small Leak 📷. P0456 Ford EVAP System Leak Detected Gross Leak/No Flow 📷. P0456 GMC EVAP Control System Leak Detected Very Small Leak 📷. P0456 Honda EVAP System Large Leak Detected 📷. P0456 Hyundai EVAP Emission System Leak Detected Very Small Leak 📷. Nov 26, 2018 · A user shares how they diagnosed and fixed the code P0456, which indicates a leak in the EVAP purge valve, by replacing the return line of the purge valve with a fuel hose from Pep Boys. Other users comment on their experiences, solutions, and questions related to this code. Mar 2, 2022 · 1 post · Joined 2022. #9 · Jul 1, 2022. I had this issue with my 2015 Jeep Renegade and had to replace the filler neck because of it is loose it can leak fuel and yes it will cause an small EVAP leak code P0456. I am still having the light come on even though the filler neck has been replaced and the sensor itself. =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈== How to Fix P0456 =====Engine Code P0456 Saving Repair P...80 posts · Joined 2010. #1 · Aug 30, 2010. I have a 2002 Apex Edition Wrangler. The check engine light came on a few weeks ago and I have been trying to figure out where the problem is. The codes are P0455 and P0456. They told me that it could be my gas cap, so I bought a new one and got the codes cleared. about a 5 days later, it came back on..