MS75165

I was driving a few days ago and I noticed the a/c stopped working. I turned it off/on a few times and it would work randomly. The next morning, I had the check engine light on so I had the codes checked. 7 codes popped up!!


P0135 - Oxygen
P0141 - Oxygen
P0155 - Oxygen
P0161 - Oxygen
P0443 - Evap
P0059 - Oxygen
P0645 - A/C relay


Any relationship with these codes?? Any help is greatly appreciated!!

User 92421

start with the easy, check fuses. also how is it running?

MS75165

All fuses are good. I have not noticed any change in performance..

jwog666

clear those codes and see which ones come back, then attempt to diagnose the ones that do

2007 GT//CS

When you say the a.c. stopped working do you mean the blower motor is not blowing or the compressor is not turning on?some have been known to have a issue with blower resistor if it's the fan motor not blowing...

MS75165

Compressor stopped running, just blowing hot air. I thought the compressor was cycling on/off last week, just hadn't really needed the a/c as my car is a convertible. I'd rather drive with the top down than turn on the a/c!!! I'm thinking that could be low on Freon.
I am trying the reset. I'm waiting to see what codes come back. Hopefully none!!

algregory

Look up "A/C Pro" on the web. I used it on my Subaru and '05 GT last year. Works well. Inside "tip" you get it with a gauge that you set for the temp range of the moment of the day. Then there is a green area. You don't want to try to get it way into the green area, just be happy that it is in the green area. I called the manufacture to find that out. Too much "charge" can be a bad thing. FWIW Also, they told me the bottle has significant "Shelf Life" - keep it upright, cool place, gauge attached.

2007 GT//CS

Another tip like the post before this to much is NOT GOOD at all and be careful because I have had 2 cans of freon with the guage on them that gave false readings so be careful.ask and see if anyone you know has a set of automotive a.c. guages and double check if possible.also if you don't mind dropping $50-$60 bucks you can get your own set at your local harbor freight or auto parts store. One more thing you can do is check voltage to the a.c. clutch at the plug where it hooks up on the compressor. If freon don't help issue you can always check to see if compressor clutch is bad or the compressor it's self is bad.if you charge it up with freon and it works for a short while and stops then you more than likely have a leak and you can get the freon with a Florescent dye and a small blue or black light come in the kit.you charge it up again with freon with dye and use the light to check for leak .its best to do it in the dark so the dye shows up better with the light. Check under the hood and also turn blower motor on and check out if you get Florescent mist out the vents.if so that's worst case and hardest part to change.all under hood components are fairly easy to change and you should always use a vacume pump to remove air from system after changing any parts .then charge to proper level with freon.message back if you need further help

2007 GT//CS

Also I wouldn't think the a.c. being low would cause you to get any codes or if so only one.you may have some other issues that need investigation

SCCAGT

Correct.
Captain Obvious says, "since the code said 'A/C relay'..... start there".

Oxygen sensor codes and Evap codes have absolutely nothing to do with the operation of the A/C.