2004 honda odyssey. Code p1129 and code p0505

Question

I have a 2004 honda odyssey. Code p1129 and code p0505 can you tell me what these mean and the possible defective part

Answer 1

P1129 MAP sensor signal higher than expected

P0505 Malfunction in idle control system

The IAC (idle air control) may be faulty if this valve sticks open it can create a higher than expected manifold pressure causing P1129 to set before P0505 to set. If you have both P1129 and P0505 you have faulty IAC vavle.