How you can Clean the EGR Valve for GM Code P1406
1Park the GM and permit the car ample time to cool off Auto diagnostics, up to a half hour.
2Open the hood on the automobile and find the EGR valve. You may uncover the EGR on GM models on the intake manifold. Place may perhaps vary slightly from model to model, so it's greatest to refer for your repair manual. The valve looks like a mushroom leading element having a hose and electrical connector coming off it.
3Pull the vacuum hose gently from the valve to remove it. Squeeze the sides of the electrical connector and pull the connector straight off. Location each components towards the side to make sure they do not get damaged throughout the removal process.
4Use a socket wrench to loosen and get rid of the two bolts securing the valve for the mount. Turn the wrench counterclockwise until you get rid of both bolts. It is possible to now remove the loose valve. Lift the valve straight off the mount using some force.
5Place the EGR valve in a compact bowl with about an inch of carburetor cleaner. Be certain only the bottom part of the valve is soaked. Leave the valve overnight to enable the cleaner to penetrate the carbon.
6Use a wire brush, compact pick plus a rag to clean the valve. Push open the valve and clean any carbon debris or build up. The valve really should now move freely. Allow the valve to air dry fully.
7Reinstall the valve. Align the valve on the mount so the holes on the valve match the holes on the mount. Insert the two bolts and tighten making use of the socket wrench. Plug the vacuum hose back into the valve. Reconnect the electrical connector Auto diagnostic tool, then push it into location until you hear it click secured. Close the hood of the GM automobile.
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