Mel M Posted January 16, 2014 Share 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. Quote Link to comment Share on other sites More sharing options...
gbhrps Posted January 20, 2014 Share 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! Quote Link to comment Share on other sites More sharing options...
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