Hey everyone. I have an '09 Pontiac Vibe with the oil-burning Toyota 2az fe engine. 173500 miles. I've had the car for a few months now and it's burning a quart of oil every 1000 to 1200 miles. Just today my CEL came on for code P0420 (catalyst efficiency). I had a misfire code on cylinder 4 a couple months back, but changing the spark plugs seemed to have fixed that since I have not had any more misfire codes since. I also replaced the split/cracked ignition coil boots (can't tell any difference better or worse) I don't believe that means I don't have occasional misfires simply because I haven't had any codes. The car occasionally idles low, hunts for idle, and vibrates, but I can't tell if it's actually misfiring or not. I've tried a few different motor oils as well as Marvel Mystery oil in the gas and crankcase to mitigate the oil consumption problem to no avail. So, I have a few questions:
Are there any causes/solutions to this code other than the catalytic converter?
Could the MMO or other gasoline/oil additives have contributed to this code? (I've used several including redline, lucas, kreen, and possibly a little too much MMO)
Has anyone successfully reduced oil consumption for this engine without rebuilding it?
Can excessive oil consumption (blowby) cause this code?
Should I get rid of this car?
She always starts and runs reasonably fine. Everything else works perfectly.
Any thoughts and/or suggestions are greatly appreciated!
Are there any causes/solutions to this code other than the catalytic converter?
Could the MMO or other gasoline/oil additives have contributed to this code? (I've used several including redline, lucas, kreen, and possibly a little too much MMO)
Has anyone successfully reduced oil consumption for this engine without rebuilding it?
Can excessive oil consumption (blowby) cause this code?
Should I get rid of this car?
She always starts and runs reasonably fine. Everything else works perfectly.
Any thoughts and/or suggestions are greatly appreciated!
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