Mel M Posted January 16, 2014 Posted January 16, 2014 On a 2007 ES350, getting a Check Engine light with a code of P0351. What is this code? I thought it might be an O2 sensor.
gbhrps Posted January 20, 2014 Posted January 20, 2014 P0351 is the code for "ignition coil A Primary/Secondary Circuit Malfunction". A little online searching shows you probably have a bad "coil on plug" on cylinder #1, which is the right rear (passenger side at the firewall) most cylinder. You might try changing that coil pack for a known good one to verify, if you can locate one from a wrecker/friend/etc. Good Luck!
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