And what typically causes this? The biggest problem when this code appears is that the Check Engine light comes on and stays on. Lower the tank halfway to access the fuel tank pressure sensor. Smell gas and now a second issue came up. What are the symptoms of the P0454 code? I really would hate to bring it somewhere and pay someone to fix it. So now I'll just wait and see what happens. If your spark plugs look good, problems with your ignition system can also preventing a spark.
P0454 Description The Evaporative Emission System control system pressure sensor detects pressure in the purge line. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage. Yes sir you can repair this yourself. The code it's reading is P0454 which to my understanding is pertaining to the fuel tank pressure sensor. This means that the issue could be caused due to a number of different problems. Possible symptoms: - Fuel Tank Pressure Sensor harness is open or shorted - Fuel Tank Pressure Sensor circuit poor electrical connection - Faulty Fuel Tank Pressure Sensor The code 0305 means cylinder 5 misfire detected.
The vehicle conducts an engine off natural vacuum test to detect vapor leaks. I had the same code and code 449 and my vent vent valve selonoid was bad. When the engine is operating, the fuel vapor is purged from the carbon element by intake air flow and consumed in the normal combustion process. Well today I replaced the gas cap and cleared the codes. Visually I don't see anything but not really sure what I'm looking for. In the mean time I will inspect the hoses for any damage.
This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. That allowed outside air to enter the tank as you used up the gas inside the tank. Additional comments for consideration regarding the P0454 code Even though you might not notice any difference in the performance of the vehicle, you never want to let a code go unattended for long. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the light turned off. In some cases, especially with older vehicles that have a lot of miles on them, there could be false alarms when a code appears. How does a mechanic diagnose the P0454 code? Spark plugs typically need to be replaced every season or 25 hours of use. The control system pressure sensor is not used to control the engine system.
The mechanic wants to make sure it is a real problem before they try to repair the vehicle. It is used only for on board diagnosis. I have a 2008 Silverado with a 5. Not sure if that makes any difference? Was able to take a look underneath today at work and from what I could see, feel and smell there is gas leaking on top of the fuel tank where the fuel pump goes in. So follow and inspect the hoses that run out from the gas tank? The 455 is a large leak in the evap. Well the gas cap replacement was not the fix.
If there is no damage to the canister, check the lines that run under the van from the fuel tank and canister to the purge valve under the hood. I purchased the new vent valve selonoid for an auto parts store that sells ac delco parts. The information supplied by the fuel tank pressure sensor to the Engine Control Module is used in order to detect vacuum decay or an excessive vacuum during the diagnostic routine. Posted on Dec 01, 2009 p0455-- emission control system a large leak the most common cause is a bad seal on fuel cap, remove and replace cap, if light stats on. Vacuum is consider negative pressure. Well tightening the gas cap doesn't help.
What the P0454 code means If this code is present in your vehicle, it means that the evaporation control system is not working correctly. This morning the trouble occured again. Install the fuel tank pressure sensor shield, Part 20893611. Possible symptoms: - Faulty spark plug 5 - Clogged or faulty fuel injector 5 - Faulty ignition coil 5 - Fuel injector 5 harness is open or shorted - Fuel injector 5 circuit poor electrical connection - Ignition coil 5 harness is open or shorted - Ignition coil 5 circuit poor electrical connection - Insufficient cylinder 5 compression - Incorrect fuel pressure - Intake air leak Read more: Read more: Aug 27, 2013 Here is the definition of the code. If the code appears again replace the gas cap or inspect the system for cuts or holes in the tube or hose. If none found it could just be the vent solenoid stuck in the venting position. Gave everything a check over drove home everything ran good.
Recently I began smelling gas in the garage and then near the vehicle. I found the info on this website but not sure where. So I put me original gas cap back on which is good because it has the leash to keep from loosing it. When the P0454 code appears, it is common for other trouble codes related to the evaporative emissions control system to show up as well. So, check gas cap, check vacuum lines from fuel tank and trace the lines making sure there is no break. The closest thing that makes any sense is a P1486 which would indicate a pinched hose in the same monitor system as the other 3 codes. Take the time to bring the vehicle to a mechanic who can inspect it and who can determine the problem.
Often, dealing with a vacuum leak, or making sure that the fuel cap is on properly is all the mechanic needs to do. The solution is here : Chevrolet Silverado P0454 Possible Solution : Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. If all else Fails do a General Search on the Internet for Recalls on your Truck, I can't right off hand remember the Correct site But, Try Edmunds. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. Installing the shield prevents further false trouble codes.