Undocumented Code P0305 [Archive] - GrandAmGT.com Forum


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02-02-2005, 10:48 AM
I have a 99 Grand Am Gt. I was driving down a hill and went to hit the gas when the car just sputtered. I pulled over and couldn't get the car to start up again. Check the error codes and got P0305. In my dealers manual the 3.4L error codes go to P0300 and p0325, but no P0305. Anyone have an idea?
Thank you

02-02-2005, 11:50 AM
P0305 is a misfire on cylinder # 5.

02-02-2005, 01:01 PM
This is probably better than a general misfire, you know it's a specific cylinder. Try swapping wires, see if it goes away, try swapping coilpacks (they're numbered, but you can swap them, just wire it to where the "old" number used to be). Also check the plugs (argh, why is it always the odd numbered cylinders that act up, they're on the firewall side of the engine). I'm not an expert, but if was just the one cylinder, i'd guess the car should still start.

03-25-2005, 10:27 AM
Thank you