service engine soon codes

[eddie_dsm12]

I have a 99 gst. I recently bought a obd2 scanner to read the codes it was throwing because the service engine soon light was getting annoying. Its throwing a p0135 and p1105. I did search on these codes but it didn't help much. What exactly am I suppose to fix/replace. Thanks again for the help!

 

[Absit]

P0135 ~60 Results
P1105 ~100 Results

There you go! You're going to have to read, but the beauty of OBDII codes is they're not super exact, just because one code's showing up doesn't mean that component is even the problem, so the only solution is to..read and test, or post a ton more information, and then..read and test.

 

[luv2rallye]

P0135 is front O2 sensor heater circuit malfunction.
P1105 is fuel pressure solenoid malfunction.

 

[eddie_dsm12]

Does that mean I would have to replace both? Sorry for the noob q's.

 

[Absit]

Maybe, it certainly means you have to inspect/test both.

 

[eddie_dsm12]

Okay so here's the deal! I was tryin to get to the o2 and I can't get to it. I'm trying to get at it from the top of the engine bay but the damn alternator is in the way. Do I have to get it from the bottom of the car? Or is there an easy method? Thanks for the help. And by the way I do have the o2 socket.