how to troubleshoot a code P0302 on a 1999 Buick LeSabre


Asked by Jun 22, 2017 at 06:31 PM

Question type: Maintenance & Repair

#2cyl not burning all fuel. chgd all spk plugs, wires, coil packs, O2 sensors

3 Answers


Injector may be dirty.


Check that injectors electrical connection (s). It may not be pulsing correctly or is clogged up. May also be a sign that you should have put a new fuel filter on.


If just lightly clogged a bottle of injection cleaner may clear it up but I would not count on it. You can have it tested and cleaned or watch youtube for details on how to do this yourself and how to rebuild them as o rings go bad too plus it has a tiny screen filter.

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