Having problems with your 2002 Buick LeSabre ?
2002 Buick LeSabre shows 3 trouble codes: p0404, p0410, AND P0300 .. Car lacks power... will operate pretty well between 1800 and 2400 RPM. Beyond 2400 RPM there is nothing, no response when accelerator is pressed..
P0300 is random engine misfiring. Could be several problems. My car had this and I replaced the plugs and plug wires. No change. Checked the three coil units. They seemed ok. I used a new on in each spot and nothing changed. Ended up being the ignition control module that sits under the coils. Relatively easy to change. Costs around $150 at the parts store. This may correct the other codes.
Repair Help & Product Troubleshooting for 2002 Buick LeSabre
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