periodic pressure or vacuum tests on the EVAP system to confirm that the system is working properly. If the ECM detects a significant leak of pressure (or vacuum) that might allow gasoline vapors to enter the atmosphere, it will store a diagnostic code P0455 and turn on the checkenginelight...
I have a 2005 Chevrolet Silverado 1500 and the other day the engine light came on. The Chevy dealer said the check engine light is related to the emission control system and that I could keep driving the car. I took the truck to Auto Zone and they let me borrow their engine code reade...
The first thing to check with this code is the gas cap. If it is left open or loose, close it tight and the "Check Engine" light should reset itself after a few drive cycles. Sometimes the gas cap itself can go bad. Have a closer look at it, if there is visible damage to the ...
Check engine light came on a couple of weeks ago. At first it was just the battery code P1684 and the small evap code P0442. Now the other two codes are showing as well. What are the chances that this is only a gas cap issue? I just replaced the cap but have not driven it yet...
About a week and a half after that the light came on and the codes were the same again. We took it in, scanned code P0456, checked for leak in EVAP, could not locate leak. They told us we should check out service bulletin 18-028-3 and reset the codes again. ...
Check under the hood to make certain no vacuum lines are disconnected, check your fuel cap if it isn't sealing correctly or is missing or the wrong one this will cause that code to set, You may have a bad vent valve causing the problem. What this code means is that the computer has...