Method to retrieve CEL Codes?? - Page 2 - Defender Source
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  #21  
Old June 6th, 2013, 06:58 AM
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Phillip
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i still am a newbie, be careful to not break the sensor off in the y-pipe. The PS side (45) is a little easier to access than the DS (44). My RR is parked for a while with a snapped off O2 sensor.
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  #22  
Old June 6th, 2013, 07:01 AM
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Quote:
Originally Posted by o2batsea View Post
Are they like Classics in that it's so much of a PITA to get to the display as to make it virtually useless?
I cut a small window in my Classics to view the 14CUX display...but I've never gotten a CEL!
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  #23  
Old June 6th, 2013, 07:43 AM
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there is enough length on the cable, I keep it readily accessible between the seat and console.
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  #24  
Old June 6th, 2013, 08:33 AM
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That's a good trick Phillip; useful for you guys with shitty running trucks.
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  #25  
Old June 6th, 2013, 08:54 AM
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Well, call me environmentally unfriendly, but I would do nothing until the truck failed its emissions test. Then I would use the expense of the 02 sensors toward a waiver.
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  #26  
Old June 6th, 2013, 08:56 AM
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Quote:
Originally Posted by rover4x4 View Post
i still am a newbie, be careful to not break the sensor off in the y-pipe. The PS side (45) is a little easier to access than the DS (44). My RR is parked for a while with a snapped off O2 sensor.
leave it and weld in another bung. i think i have a couple..
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  #27  
Old June 6th, 2013, 09:06 AM
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I don't really have to worry about emission tests where I live, but the truck has a pretty rough idle when the CEL comes on. I will be on the search for sensors this morning and thanks for the pointers.
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  #28  
Old June 6th, 2013, 09:28 AM
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Quote:
Lots of things throw a CEL on a 14CUX
Not really. 99.999 percent of the time it's oxygen sensors. The other things that can cause a CEL are the Throttle position sensor, the mass air sensor and the water temp sensor. Those items rarely go bad. Not that they don't, but I would look at the HEGOSs first.
I basicly means that the engine is unable to figure out how to maintain its 14.7:1 air/fuel mixture.
Oxygen sensors only come into play after the engine has reached operating temperature.

If the code is intermittent, try unplugging and reconnecting the sensors. It may be that the connectors have a little corrosion.

------ Follow up post added June 6th, 2013 09:31 AM ------

Quote:
I don't really have to worry about emission tests where I live, but the truck has a pretty rough idle when the CEL comes on. I will be on the search for sensors this morning and thanks for the pointers.
Well, I'm no expert, but I have not experienced rough idle with bad oxygen sensors. I would suspect the mass air meter. Poll the forum. Most of us have at least two or three sitting in a box collecting dust and spiders. These work by stretching a heated wire across the incoming air stream. The amount of voltage needed to keep the wire hot is used to calculate the air flow. If this thing gets wet, coated in dust, crud or even snaps, then the meter is not going to work.
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  #29  
Old June 6th, 2013, 10:00 AM
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Charles Galpin
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Nothing special, just a rovergauge cable. There should be pics in the rovergauge thread.

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Charles, what is your set up? any pics?

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  #30  
Old June 6th, 2013, 02:15 PM
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Quote:
You're OBDI - follow these steps

http://www.fourfold.org/LR_FAQ/Defen...ult.Codes.html
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On this site, there are references to numbered tests to perform when troubleshooting but I am unable to find the test procedures....like: "Code 12 - Airflow meter

Refer to test 19, continuity test procedure"


Anyone know where I can find test 19, etc...?
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  #31  
Old June 6th, 2013, 02:39 PM
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You are 14CUX. That page is for 4.0-4.6 GEMS or Bosch engines.
If you want to dig into the gritty particulars of the venerable Land Rover EFI, google 14CUX and be enlightened.
the article at: http://www.britishv8.org/articles/rover-14cux-efi.htm isn't too bad for non-engineering blokes like me.
In addition you will want to get the Rave manual which includes the labarynthine Electronic Troubleshooting Manual (ETM) which will provide hours if not weeks of tail-chasing, confusion and dead ends.
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  #32  
Old June 6th, 2013, 02:47 PM
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I think the RRC fuel injection manual should be suitable... http://www.landroverweb.com/landrove...rover-manuals/
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  #33  
Old June 6th, 2013, 02:57 PM
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John Crouse
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My NAS D110 throws odd codes every now and then. I turn the power off, wait a few minutes, turn it back on and the codes go away 99% of the time.
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  #34  
Old June 6th, 2013, 03:07 PM
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Quote:
Originally Posted by Red90 View Post
I think the RRC fuel injection manual should be suitable... http://www.landroverweb.com/landrove...rover-manuals/
Always a good bunch of reading there.
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  #35  
Old June 6th, 2013, 04:44 PM
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IIRC there was an issue with codes 44 and 45 in that by description, they indicate one side of the engine but were actually the other side! 14x isn't all that smart, so yes it could be "just" an O2 failure, and if they are of the same age, I'd replace both, but an intake leak, an injector o-ring vacuum leak, an injector issue all could contribute to an o2 sensor going out of range and setting a fautl, without the sensor actually being bad! Again, they are easy and are not an unlikley culprit.
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  #36  
Old June 6th, 2013, 06:05 PM
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Quote:
Originally Posted by Nomar View Post
That's a good trick Phillip; useful for you guys with shitty running trucks.
This is a Defender forum, the CEL bulb is probably burnt out on yours. I know your jealous you dont have the shopping bag net.
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  #37  
Old August 2nd, 2013, 09:00 AM
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Well, finally replaced both O2 sensors since I was getting a code 46....then, after a bit of driving, the idle seems to dip down for a second and then trips the CEL and has a rough idle and throws 46 again...maybe MAF sensor? I cut off the battery for a few minutes and it runs fine for a bit....then does it again....
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  #38  
Old August 2nd, 2013, 09:48 AM
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Did you replace the stepper motor? The PO of my D-90 put in a new one that lasted perhaps 5,000 miles. The stepper went bad on my watch and the truck exhibited systems like you are describing, throwing the same code and very low idle. However, after the engine warmed up, the truck ran fine. After confirming there were no vacuum leaks, I checked the stepper which looked clean on the inside and out. Spraying it with MAF cleaner did nothing. So I replace it with a NIB Lucas stepper from this this forum (it happened to be used -- oh well, pay the price of new and receive a hand me down....). The symptoms reversed where now the truck had a high idle (1500 or so) until warming up. However, after driving it a few times, 14CUX did its mapping/calibration thing and the truck runs and idles perfectly.
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  #39  
Old August 2nd, 2013, 09:50 AM
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http://p38arover.com/rover/p38a/Engi...UX_Systems.pdf

http://www.g33.co.uk/images/PDFS/LR_...ionSystems.pdf
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