Hello Forum: My daughter in law has a 2013 Ford Explorer, 3.5 L. It has had quite a bit of work recently & the last thing she had done was an A/C Compressor replaced, along with the Serpentine Belt Tensioner & the Purge Valve Solenoid. The Mechanic noted that when the A/C was turned on, that it vibrated & that the stress of the Compressor about to go out, was possibly the cause. He replaced all the above-mentioned items & it is STILL an issue! When she got it back, it still had the vibration, along with a ticking sound & we found out by taking it somewhere else for a 2nd opinion, that the NEW Purge Solenoid was bad. We purchased another one & the ticking sound quit. The Vibration however has gotten worse & along with the A/C turning itself ON & OFF & vibrates the entire vehicle. They are to go on vacation in @ 3 weeks & are now going to have to Rent a Vehicle because of the issues. ANYONE KNOW WHAT POSSIBLY COULD BE AN ISSUE WE CAN TROUBLESHOOT?

 

How is the idle when AC is not selected ?
This may require a little more troubleshooting than anticipated..

When an addl load is placed on the engine such as AC, the computer is supposed to raise engine RPM in response to the addl load..
Is this happening, yes/no ?

 

Hello & thank you for responding:

No.....When the A/C is turned on manually, it does not raise the RPM's, it lowers it. The rough idle began before the A/C etc., was replaced & yet continues. NOW, the A/C turns ON by itself & then turns itself OFF. As it does this, it rough idles & has a 'noise' that sounds like you have turned your Turn Signal On & yet you have not. The Battery has been replaced @10 days ago, because of other issues it was creating, as well. There are Hard Codes that have been saved in the Memory of the Computer that were printed out for us. We are not certain if any of them would cause the issues that she is having. This Forum appears to be a way to get opinions and/or experiences that could short cut our troubleshooting. Thank you.

 

You do realize you are asking us to offer suggestions when you have valuable info that would help.

We can't get codes via internet ,but you have them and we just might be able to offer some suggestions that might be helpful.

Can you post the codes received ?

Those codes should provide some direction as to where to start checking.
There is another problem with the AC. It is low on refrigerant charge. The clicking on and off of the compressor clutch tells us either the system was not fully charged when the vehicle was returned to you OR there is a leak in the system.
You might want to have the same shop recheck their work.

 

Yes, I did realize that we had some clues within the Hard Codes; however, we did begin with the Batter replacement. That did solve one of the Scree Read-outs as noted below. With the current problem with the AC, we just didn't know where to go from here. Thank you again for being kind enough to try & help us with the next troubleshooting step(s).

The hard codes that were in the Explorer’s memory bank, were issues with the battery first & foremost that were causing the Screen to Read, “System Off to Save Battery”, etc. Additional Hard codes were: Battery Voltage - Circuit Voltage Below Threshold; Internal Control Module-Electronic Failure; Reverse Gear Switch-Signal Plausibility Failure (Back up Camera doesn't work again); Invalid Data Received from (ECM) (PCM); (TCS) Control Channel B Valve 2 - Internal Electronic Failure. There was one more Hard Code that was noted & that was an additional Powertrain Diagnostic Trouble Code>>Catalyst System Efficiency Below Threshold (Bank 1).

 

You can get all kind of random codes like yours when your battery (+) cable was overtightened or not tightened to OE torque spec at 44 in-lb.

 

Your vehicle has other problems aside from battery problems.

Is there some reason you choose not to provide the codes ?

 

I did provide the Codes ....it is in my 3rd Post.

 

Don't know where your third post is.

There is a problem with one bank that is affecting the excess pollution limit. Is your check engine lamp illuminated ?

 

You have to provide the unique code number (usually a letter + numbers), then pinpoint tests can be retrieved by code number. The code's descriptions you provided at post #5 are useless and meaningless. Because the description is too brief and not descriptive, it can point to multiple code numbers (having the same brief description) so you can't do a reverse lookup reliably and correctly. With the unique code number you can then look up the ford service manual. So when it comes to code we must go by its searchable number, and not its brief description.
The Catalyst System Efficiency Below Threshold (Bank 1) you mentioned above, because of limited character space on its display screen on a particular scanner, can be shown as Cat Eff Below Threshold B1, this abbreviation can you look it up for its associated code number correctly? You can't.