The EVAP system traps all the fuel vapor from the fuel tank and processes them for ignition to the engine\u2019s intake during the combustion process. <\/p>\n\n\n\n
When a small leak in your Jeep Grand Cherokee’s Evaporative Emission Control system, the P0567 code appears. To help you comprehend the code, here\u2019s a breakdown of it-<\/p>\n\n\n\n
- \n
- P = OBD-II Powertrain trouble code for the engine<\/li>\n\n\n\n
- 0 = A generic number derived from the SAE standard<\/li>\n\n\n\n
- 4 = Auxiliary emission controls malfunction detected <\/li>\n\n\n\n
- 56 = Specific fault index (In this case, it denotes evaporative emission control system malfunction)<\/li>\n<\/ul>\n\n\n\n
Causes Of P0456 Jeep Grand Cherokee Code:<\/h2>\n\n\n\n
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.<\/p>\n\n\n\n
Usually, a broken gas cap or a loose fitting is the main culprit. There are plenty of other reasons as well that, include the following:<\/p>\n\n\n\n
- \n
- Misplaced gas cap<\/li>\n\n\n\n
- Barrier or accumulation of debris in the fuel filler cap<\/li>\n\n\n\n
- Worn out O-ring of gas cap or fuel filler tube<\/li>\n\n\n\n
- Small leakage in the EVAP canister<\/li>\n\n\n\n
- Disconnected hose of EVAP<\/li>\n\n\n\n
- Malfunctioning vapor canister purge valve<\/li>\n\n\n\n
- Worn-out charcoal canister<\/li>\n\n\n\n
- Defective FTP sensor <\/a><\/li>\n\n\n\n
- Leaks in the control valve or vacuum feed line<\/li>\n\n\n\n
- Drained or dried fuel filler neck gasket<\/li>\n<\/ul>\n\n\n\n
Read Also:<\/strong> How to Troubleshoot & Fix P0128 Jeep Wrangler DTC Code?<\/a><\/p>\n\n\n\n
How To Troubleshoot & Fix P0456 Jeep Grand Cherokee Code?<\/h2>\n\n\n\n
P0456 is a low-intensity engine trouble code; the issue may not be severe and won’t likely cause your Jeep Grand Cherokee to break down in the middle of nowhere. But you must take the necessary steps as soon as it is detected. <\/p>\n\n\n\n
As you know, there are multiple reasons for the code. One might trigger another, which would ultimately cause serious harm to your car. We’re here to walk you through the troubleshooting procedure for each potential cause so that you can make a speedy diagnosis. Let’s go ahead <\/p>\n\n\n\n
#1-Look for other OBD-II codes, if any<\/h3>\n\n\n\n
To begin the troubleshooting, you need an OBD-II scanner, which you can find in your local stores or online. You need to get one to scan your Jeep Grand Cherokee to find out if other trouble codes persist along P0456. There are possibilities of getting codes P0440, P0441, or P0446 along with P0456.<\/p>\n\n\n\n
If that’s the case, there\u2019s probably a leaking charcoal canister, a more extensive or complicated leak in the EVAP system, or solenoid failure. In this case, you must repair the other codes first and get rid of them. <\/p>\n\n\n\n
Here\u2019s a tip, remember to keep a record of your data by freeze-frame data\u2014these act like breadcrumbs for the technician to better comprehend the vehicle’s condition.<\/p>\n\n\n\n
#2-Check for a Worn-out or Loosely Fitted Gas Cap<\/h3>\n\n\n\n
The next step is to look for a worn-out or loose-fitting gas cap. As we already mentioned, a loose gas cap or a worn-out cap might be the cause of the code. So, before troubleshooting other parts, you need to check the state of the gas cap. <\/p>\n\n\n\n
If you\u2019re lucky enough, you might get rid of the code by simply tightening the gas cap. However, if your EVAP system gas cap is wholly damaged or worn out, you should take steps immediately. <\/p>\n\n\n\n
Here\u2019s a catch, there is not always noticeable damage on the gas cap. So, if neither your gas cap is loosely fitted nor damaged, then you should try replacing the gas cap and see if the code is omitted. <\/p>\n\n\n\n
Fortunately, the price range of gas caps for your Jeep is low to moderate. The price for new gas caps generally varies from $23 to $80, and that of gas cap O-rings ranges from $10-$50.<\/p>\n\n\n\n
Read Also:<\/strong> How To Troubleshoot & Fix p1494 Jeep DTC Code?<\/a><\/p>\n\n\n\n
#3-Inspect for EVAP Leaks or Hose Disconnection<\/h3>\n\n\n\n
If none of the above steps work, you should look for visible leaks in any part of the EVAP system. If none are visible, your following action should be to check for disconnected EVAP system hoses. <\/p>\n\n\n\n
You should also look for any damage or cracks in the hose connected to the EVAP or engine air box. <\/p>\n\n\n\n
<\/figure>\n\n\n\n
Source: https:\/\/www.youtube.com\/watch?v=f0VPKmYrpDA<\/strong><\/a><\/p>\n\n\n\n
The easy but pricey solution to this issue is to replace the hose. Hose prices may typically range from $190-$600. But this is a wise investment because a hose can last for years!<\/p>\n\n\n\n
#4-Check for Charcoal Canister and Fuel Tank Damage<\/h3>\n\n\n\n
If replacing hoses doesn\u2019t work for you either, or you have a set of completely fine hoses, you should inspect the fuel tank and charcoal canister for any damage. <\/p>\n\n\n\n