Contradiction with Matthew 19:17
This verse states that only God is good, which might seem to contradict the idea of finding life through God's precepts as stated in Psalms 119:93, as it emphasizes God's uniqueness rather than the power of His precepts.
Matthew 19:17: And he said unto him, Why callest thou me good? [there is] none good but one, [that is], God: but if thou wilt enter into life, keep the commandments.
Contradiction with Romans 7:19
This verse discusses the inability to consistently do good, which contradicts the idea in Psalms 119:93 that one will not forget God's precepts and they will sustain life.
Romans 7:19: For the good that I would I do not: but the evil which I would not, that I do.
Contradiction with Galatians 2:21
This verse says if righteousness could be gained through the law, Christ died in vain, contradicting the idea in Psalms 119:93 that life is gained through God's precepts.
Galatians 2:21: I do not frustrate the grace of God: for if righteousness [come] by the law, then Christ is dead in vain.
Contradiction with Hebrews 8:6
This verse speaks of a better covenant established on better promises, suggesting the old covenant (which includes the precepts) is inferior, which seems to conflict with Psalms 119:93.
Hebrews 8:6: But now hath he obtained a more excellent ministry, by how much also he is the mediator of a better covenant, which was established upon better promises. [covenant: or, testament]