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Troubleshooting P0011 and P0021 codes
I have an 08 Nissan Altima SE 2.5 w/55k miles. I'm intermittently getting P0011 and P0021 codes.
They started happening a little while ago, I just changed oil couple days ago. Running Mobil 1 synthetic. I've run synthetic ever since I bought the car new. Oil level is fine. Oil changes have been regular.
Will periodically get one code (P0011 more often) or the other on start up... and may periodically get it soon after restarting warm engine.
Engine runs smoothly, no rough idle, nothing really odd. I have a ScanGauge II - so can monitor timing, RPMS, load, etc. Timing seems fine -- in fact, timing normally remains the same before and after the code is thrown.
Any suggestions on where to start? I've looked at the factory service manual for the location of the solenoids - but no mention of how to remove them. If anyone has tips, that would be great. I've seen prices of like $190 a piece online for the solenoids.
Just trying to see what I can do to troubleshoot - before giving up to a repair shop.
Last edited by jtatz; 04-10-2012 at 12:30 PM.