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Participant

Join Date: Oct 2007
Posts: 1

DTC codes

10/29/2007 8:55 PM

I need to know what these codes mean, is it something major i need to have fixed

LF Wheel Speed Circuit Malfunction

RF Wheel Speed Circuit Malfunction

Wheel Speed Sensor Frequency Error

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Guru

Join Date: Aug 2007
Location: Earth - I think.
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#1

Re: DTC codes

10/29/2007 10:00 PM

DTC codes (Diagnostic Trouble Codes), have SOME common codes. These are usually related to problems that have to do with emissions, or things that are common to all engines/cars. The codes that you mentioned, are specific to YOUR make and model of vehicle (not all vehicles have wheel speed sensors - probably for the anti-lock braking system), and therefore the manufacturer's website would be the best place to search.

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Power-User

Join Date: Feb 2007
Posts: 273
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#2

Re: DTC codes

10/31/2007 8:32 AM

It means that your Anti-Lock Brake System is F.U.B.A.R..

Fouled Up Beyond All Redemption!

This is very common in the Snow Belt Areas that salt the roads.

Be ready to spend some serious money.

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Power-User

Join Date: Aug 2007
Location: Bridgeport, New Jersey, USA
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#4
In reply to #2

Re: DTC codes

10/31/2007 8:48 AM

If it's just the sensors, they aren't that big a deal - and they take all of 45 seconds to replace. If its something in the ABS pump/computer/hydraulic systems, yeah, that could lead to big bucks...

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Power-User

Join Date: Aug 2007
Location: Bridgeport, New Jersey, USA
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#3

Re: DTC codes

10/31/2007 8:38 AM

Yes - those two codes relate to the wheel speed sensors that are part of the ABS and/or traction control system if present on your car - two electronic sensors that measure wheel speed and tell the ABS system when/how much to apply the brakes.

Frequently, they get wet or work loose and send a false positive - sometimes just wiggling them into position works. Not a biggie, but if the codes persist you'd probably want to have someone qualified to look at them and replace if necessary.

And a factory manual for your car will explain ALL the DTCs...my Eldorado has about 400 of them. :)

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Guru

Join Date: Jul 2007
Location: UK, Midlands
Posts: 515
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#5

Re: DTC codes

10/31/2007 8:53 AM

I don't suppose it applies but I disposed of car I was very fond of because of persistent ABS malfunction that would prevent the thing stopping! So much for safety! Disabling the ABS was fine....up untill the annual inspection. I put it down to the fact that the toothed or serrated section of the hubs/driveshafts had become so corroded that the ECU could't determine the signal form the pick-ups. Uneconomic to replace 'em all. Now I grease those bits.

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Participant

Join Date: Nov 2006
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#6

Re: DTC codes

10/31/2007 11:00 AM

Looks like those codes are manufacturer specific and a good place to start sorting out theis problem would be the ABS sensors as suggested.

Here is a link to a site that contains a break down of what other DTC codes mean, it be useful for future reference:

http://www.scangauge.net/DTC/Selection.html

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Guru

Join Date: Jul 2007
Location: UK, Midlands
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#7
In reply to #6

Re: DTC codes

10/31/2007 12:25 PM

That's a useful tip, but some names are conspicuously absent lie the one I drive! So much for standards.

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