The AC-Delco brand is the original equipment (O.E.) part for your Chevrolet Silverado (GMC Sierra). P0443 -What Does It Mean? (1999-2006 V8 Chevrolet Silverado, GMC Sierra).You can find a more detailed explanation of the P0443 EVAP purge solenoid trouble code here: Difficulty filling up the gas tank with fuel.Your Silverado (Sierra) fails the emissions test.Pressure in the gas tank when you remove the gas tank cap.P0443: EVAP System Purge Control Valve Circuit Malfunction.The check engine light will be illuminated by one of the following trouble codes:.Generally you'll only see one or more of the following symptoms: When the EVAP purge solenoid fails, it'll usually not be able to open and permit the fuel vapor to enter the intake manifold (when commanded ON by the fuel injection computer).Ī bad EVAP purge solenoid usually doesn't cause any engine performance problems or drive-ability issues. When the fuel injection computer commands the EVAP purge solenoid ON, it opens and lets the fuel vapors stored in the EVAP carbon canister into the intake manifold. In this OFF state, the EVAP purge solenoid prevents fuel vapor stored in the EVAP carbon canister from entering the intake manifold. To be a bit more specific, the EVAP purge solenoid is in an OFF state most of the time. How? It does so by acting as the switch that allows the fuel vapor stored in the EVAP carbon canister into the engine. The component responsible for 'purging' the fuel vapor in the EVAP system into the engine (to be used as fuel) is the EVAP purge solenoid. This prevents the fuel vapor from being released into the air (environment). The EVAP system does this by trapping and then recirculating this fuel vapor into the engine (so that it can be used as fuel). The purpose of the EVAP system is to reduce the evaporative emissions pollution that is produced by the fuel vapors released by the gasoline stored in the fuel tank. The canister purge solenoid is an emissions control component of the evaporative emissions (EVAP) system of your V8 equipped Chevrolet Silverado (GMC Sierra). How To Test The EVAP Vent Solenoid (1999-2002 V8 Chevrolet Silverado, GMC Sierra).The following tutorial will help you test the EVAP vent solenoid: P0443 -What Does It Mean? (1999-2006 V8 Chevrolet Sierra, GMC Sierra).You can find this tutorial in Spanish here: Cómo Probar El Solenoide De Purga EVAP (1999-2003 V8 Silverado, Sierra, Suburban, Tahoe, Yukon) (at: ).ĪPPLIES TO: This tutorial applies to the following vehicles: More Chevrolet Silverado (GMC Sierra) Tutorials.TEST 3: Bench Testing The EVAP Purge Solenoid.TEST 2: Making Sure The EVAP Solenoid Is Blocking Fuel Vapor Intake.TEST 1: Making Sure That The EVAP Purge Solenoid Is Getting Power.How many drive cycles should this take? Do I have to follow the full cycle for things like the O2 heater test which only run on a cold start anyway? I also noticed that the OBD drive cycle guidelines say that it may take up to 5 cycles to get the catalyst efficiency test to run. So far I’ve done that on 2 cold starts and still nothing. The new sensor and wiring repair fixed the initial issues. It had set codes p0113 (IAT), p0113 pending, and p0135 (O2 sensor heater). My 2000 Malibu had a bad O2 sensor and a wiring issue with the IAT sensor as well. Before the battery disconnect all the tests were complete including the two that are now giving me issues, so I know they should complete.Īny tips on getting these last two to run? I gave the car all the electrical load I could on a cold start as recommended to try and get the O2 heater to run (rear defrost, A/C, headlights, radio) but no luck. (Edited) Evap and secondary air monitors incomplete.I tried the GM OBD II drive cycle and it didn’t work for these last two, they are still incomplete. By 250 miles, I was down to these last 2 (O2 heater & catalyst efficiency). I disconnected the battery about 300 miles ago, and at 200 miles I had 4 incompletes. I can’t seem to get my O2 heater & catalyst efficiency tests to run/complete. Please register or login to enable Dark Mode.Hot Rod Power Tour/ Pump Gas Drags/ Drag Week.Gen 5 Camaro Tuning, Diagnostics, Dyno results.
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