Please help ses light

[yukondenali]

I have a 2002 yukon xl 1500 and have two codes showing. One is p0305 and p0200. I replaced the plugs and wires first and the codes still came up. So I replaced the #5 cylinder (p0305) coil and still a code. so now im lost but the guy at advanced auto parts said that it could be the #5 injector which is the p0200. Any help would be great thanks.

 

[chip]

Have you tried clearing the codes after you replaced said parts?

 

[LI99HOE]

From what I can see... the P0200 code is an open in the injector circuit.
If clearing the codes doesn't get rid of 'em, or they come back..... double check the wiring to the injectors from the ECU. Maybe corrosion on the plug terminals on the injectors, or a break in the wiring @ the injector plug(s).
Any of these conditions could cause the P0305 code which is a cylinder 5 misfire.

I know changing the plugs/wires/cap-n-rotor will resolve most misfire codes, but you had the P0200 code as well. If ur truck is constantly throwing this code..... check the wiring with a continuity meter. Hopefully it's not intermittent. Let us know

 

[yukondenali]

Ok I checked the wiring and they look fine but to be sure im going to bring it to a shop and see if they can check the continuity. Ill let you know what they say.