customer came in when engine light came on and said it had taken more starting than usual that morning, found codes p1351 pre post heating relay, p1641 injector command power step defective, p1197 injector command circuit failure, we cleared these codes and he did 500 miles with no problems and then engine light came on again and he couldn't start next morning, trailered it in to us pluged in and it had same codes on, cleared the codes and it started up and ran fine.