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Originally Posted by The Cleaner
Check O2 sensor voltage and clean the MAF. If it come back I'd change the MAF. Check for the usual cracks in the intake boots.
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I would start here, too. You can clear the codes and let it error again - see if you get the same code (or sometime a secondary error.)
On a toyota 4runner I had, cleaning the MAF fixed it.
Another time, when the O2 actually failed, it would error within 20 miles of clearing the code. How many miles on the X? is it about time to replace the sensors?