Got a CEL.....

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Jan 21, 2015 | 11:08 AM

2horses

Thread Starter

Laughing Gas

Joined: Feb 2009

Posts: 914

Likes: 1

From: New Braunfels, Texas

Got a CEL.....

Right around Christmas. Hubby used the code reader and found this:

U059E - Invalid Data Received from NOx Sensor A

And then cleared it. CEL went away and hasn't been back since, so my question is, am I safe? Was it a fluky reading on a cold day of making short errand runs? Or did I have an actual problem even though the CEL has not come back? Truck is running fine, no issues (knock on wood), and I'm not really worried - just curious more than anything.

Y'all's input is appreciated.

Jan 21, 2015 | 12:46 PM

senix

Super Moderator

Joined: Aug 2008

Posts: 37,379

Likes: 1,862

From: Frederick, MD

It is probably just a communications error...if you ask me.

Code is probably still there in the history.

My take on it is to ignore it unless it comes back.

Jan 21, 2015 | 02:32 PM

ruschejj

Post Fiend

Joined: Jan 2009

Posts: 6,521

Likes: 11

From: Greenwood, SC

I'd ignore it too except on one condition:

If your mpg has gone down a bit, take it in. Could be running too rich.

If your mpg has gone up, show me how you did that.....

Jan 27, 2015 | 11:53 AM

2horses

Thread Starter

Laughing Gas

Joined: Feb 2009

Posts: 914

Likes: 1

From: New Braunfels, Texas

Well, I've been watching my mpg and I don't see anything alarming, it may be down a little but since I didn't pay that close of attention to it previously, I can't say for sure. I think I will just wait until my next oil change, and let them check it out then. Given that I only paid 2.14 a gallon to fill up last night, I can afford a slight drop for a little longer!

Jan 27, 2015 | 11:58 AM

vloney

Postmaster

Joined: Feb 2006

Posts: 3,201

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From: waynesville, mo.

any "u" codes are a loss of communication, like a loose or corroded connector.

Jan 27, 2015 | 12:33 PM

2horses

Thread Starter

Laughing Gas

Joined: Feb 2009

Posts: 914

Likes: 1

From: New Braunfels, Texas

So, do you think it is a permanent loss or was it just temporary?

Jan 27, 2015 | 12:37 PM

SavageNFS

Fleet Owner

Joined: Mar 2012

Posts: 20,141

Likes: 15,901

From: Wisconsin

If vloney is right (I have no reason to doubt a Ford Tech citing Ford codes), the problem will exist until the connector is reattached (if loose) or replaced.

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Jan 27, 2015 | 02:13 PM

bridge

Sick 'n Tired

Joined: May 2006

Posts: 2,969

Likes: 47

From: League City, TX

If the code didn't reappear it was probably just a transient error. I've seen them popup from time to time over the years. If it comes back you've probably got a loose connection or a failing sensor.