Ok guys I got the same problem with a 08 honda accord 4 cylinder I work as a mechanic in L.A. this is what I did the car was brought in with misfire problem on cylinder # 2 and 3 plus p0339 the consumer had change the crank sensor but still same problem so when the car got here I erase all codes and when for road test at soon i went around the block check engine start flashing code p0302 and p0303 back limp mode no acceleration. When back to shop start reading everything on Google. So this is what fix the problem to me check the battery I was good with everything off one's I put ignition on battery goes to 12.3v so i when end took my battery out my car that o have just bought put it on do a crank sensor re learn won't my cheap scanner and that fix my problem no more check engine no more misfire o but the way 218$ dollars on Amazon for the sccaner