Car Batteries
Chevy Lumina

Why would a 2000 Chevy Lumina still have error code P0405 after you replaced the EGR valve and disconnected the battery terminals to reset the code?


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Wiki User
2009-02-11 16:22:19
2009-02-11 16:22:19

Clogged with carbon behind throttle body in upper intake plenium. Remove egr vavle and insert 12" contrustion tie wire through egr passage way to intake manafold . Best remove also throttle body and see a little volcano of carbon to remove. Use Throttle body spray cleaner to help desolve carbon. To rest pcm codes remove ecm bat fuse, turn ignition on 45 seconds then off and reinsert fuse.

Because you cannot reset the code by removing the battery cable. It must be reset with a OBD2 code reader.


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GM vehicles use side post batteries. The terminals are on the side of the battery. 98 Lumina with 3.8 it's on the drivers side under a red plastic cap for positive.

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you can buy jumper cables that are specifically made to clip onto side terminals for these batteries

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The battery is located under the hood on a 2000 Chevrolet Lumina. The battery will be on the drivers side.

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