02-09-2011, 03:57 PM
Join Date: Feb 2006
Location: Boise, ID
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FIXED - Codes P0300, P0304, P0171
CEL came on in Wife's 1999 Sienna, running slightly rough. My basic OBDII reader showed P0300 and P0304, so I swapped coils from 4 and 6 (probably should have had 1 and 4 misfiring if it were the coil). CEL came back on after a day, this time with P0300, P0304 and now P0171.
I had the injectors cleaned 3 1/2 years ago, one was bad so I replaced it. Should I assume that another injector has gone, or where should I start? This vehicle is driven in town every day, 10 miles or less, ODO reads 101K miles.
1983 FJ60, 1994 FZJ80, 1999 Sienna
(Oh, & a Ford pickup of some sort)
Last edited by dgspencer; 03-26-2011 at 02:03 PM.
Reason: editing title to FIXED to close the thread