IndySilveradoSS Posted February 7, 2009 Report Share Posted February 7, 2009 So my truck threw a "major leak" coming from the emissions system, which I was told by the auto part guy that because it's emissions, it's covered by a 10 year warranty congress passed, something to do with the enviroment. Has anyone else heard of this? Thanks guys Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted February 7, 2009 Report Share Posted February 7, 2009 remove and re-install/tighten your gas cap, then have the code cleared, it shouldn't come back..... Quote Link to comment Share on other sites More sharing options...
IndySilveradoSS Posted February 7, 2009 Author Report Share Posted February 7, 2009 How do you clear the codes? Also, I haven't had my gas cap off in three days, but I'll def. do it, easier than anything else. Thanks Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted February 7, 2009 Report Share Posted February 7, 2009 How do you clear the codes? Also, I haven't had my gas cap off in three days, but I'll def. do it, easier than anything else. Thanks First off, did the light come on after you filled the gas tank? If you remove and retighten the gas cap, the light should go out on its own after a few days, usually around 10 drive cycles. Did the auto part store tell you which code it was? The scan tool they used should be able to clear the codes. Quote Link to comment Share on other sites More sharing options...
IndySilveradoSS Posted February 7, 2009 Author Report Share Posted February 7, 2009 no, I drove the truck to work this morning, then back to the house, and when I restarted it the light came on. I beleive it was code 0455. I filled up wednesday night. Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted February 7, 2009 Report Share Posted February 7, 2009 According to Alldata......... DTC P0455 SYSTEM DESCRIPTION The control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge solenoid valve open and the EVAP canister vent solenoid valve closed. This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge solenoid valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or the vacuum level decreases too rapidly, this DTC sets. DTC DESCRIPTOR This diagnostic procedure supports the following DTC: DTC P0455 Evaporative Emission (EVAP) System Large Leak Detected CONDITIONS FOR RUNNING THE DTC Before the powertrain control module (PCM) can report DTC P0455 failed, DTC P0496 must run and pass. DTCs P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0125, P0131, P0132, P0133, P0134, P0135, P0136, P0137, P0138, P0140, P0141, P0151, P0152, P0153, P0154, P0155, P0156, P0157, P0158, P0160, P0161, P0220, P0442, P0443, P0449, P0451, P0452, P0453, P0454, P0464, P0496, P0502, P0503, P1111, P1112, P1114, P1115, P1121, P1122, P1125, P2135 are not set. The engine is running. The ignition voltage is between 10-18 volts . The barometric pressure (BARO) is more than 75 kPa . The fuel level is between 15-85 percent . The engine coolant temperature (ECT) is between 4-65°C (39-149°F) . The intake air temperature (IAT) is between 4-75°C (39-167°F) . The start-up ECT and IAT are within 9°C (16°F) of each other. DTC P0455 runs once per cold start. CONDITIONS FOR SETTING THE DTC The EVAP system is not able to achieve or maintain vacuum during the diagnostic test. ACTION TAKEN WHEN THE DTC SETS The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails. The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records. CONDITIONS FOR CLEARING THE MIL/DTC The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail. A current DTC, Last Test Failed, clears when the diagnostic runs and passes. A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic. Clear the MIL and the DTC with a scan tool. DIAGNOSTIC AIDS To help locate intermittent leaks, use the J 41413-200 Evaporative Emission System Tester (EEST) to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with the J 41413-SPT High Intensity White Light. Introducing smoke in 15-second intervals will allow less pressure into the EVAP system. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner. A temporary blockage in the EVAP canister purge solenoid valve, purge pipe, or EVAP canister could cause an intermittent condition. Inspect and repair any restriction in the EVAP system. To improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT. Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition. For intermittent conditions, refer to Testing for Intermittent Conditions and Poor Connections. See: Diagrams\Diagnostic Aids Quote Link to comment Share on other sites More sharing options...
IndySilveradoSS Posted February 7, 2009 Author Report Share Posted February 7, 2009 is that a test I can do at home? What happens if I continue to drive it with the engine light on? Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted February 7, 2009 Report Share Posted February 7, 2009 is that a test I can do at home? What happens if I continue to drive it with the engine light on? You really should go to a dealer or qualified mechanic for that test. I dont think driving with the light on will hurt you.......... Quote Link to comment Share on other sites More sharing options...
IndySilveradoSS Posted February 7, 2009 Author Report Share Posted February 7, 2009 Thanks for all your help, I really appreciate it. Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted February 7, 2009 Report Share Posted February 7, 2009 Thanks for all your help, I really appreciate it. Quote Link to comment Share on other sites More sharing options...
2bfast Posted February 8, 2009 Report Share Posted February 8, 2009 I had the same thing one morning. Started it up and the light came on random. I checked it with our Tech II scanner and it was an evap code. I took off and tightened the cap...cleared the code and then road tested. Hasnt came back on since. System is kinda touchy. Quote Link to comment Share on other sites More sharing options...
IndySilveradoSS Posted February 8, 2009 Author Report Share Posted February 8, 2009 yeah, I'm defintely going to do the gas cap trick and have the code cleared, hopefully that'll work, I really can't afford a big repair bill now!! Quote Link to comment Share on other sites More sharing options...
IndySilveradoSS Posted February 13, 2009 Author Report Share Posted February 13, 2009 just a update, i pulled the top engine cover off, and there was a hole poked in the top of the solenoid valve, how the hell it got there i'll never know, but I just put some black rtv over the hole, and cleared the code, and works good!! Quote Link to comment Share on other sites More sharing options...
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