1992 accord ex i am getting a code 4-2 wich i was told is left front wheel sensor. so i replaced it today with a new one and disconected the battery like you would do to reset a check engine light then i go to drive it and im still getting the code 4-2. what do i do?

 

Copy and Paste from ALLDATA:

"Clearing Diagnostic Trouble Codes (DTC's)

After repairs are completed, disconnect the ABS B2 (15A) fuse for at least three seconds to erase the ABS control unit's memory. Then turn the ignition key on again and recheck.

The memory is erased, if the connector is disconnected from the ABS control unit or the ABS control unit is removed from the body."

Hope that helps.

If those doesn't work, either disconnect the 7.5amp RADIO fuse in the underhood fuse box. If neither of those work, another code may be sitting in there.

 

sweet thanks

 

ok that didnt work im still getting a 4-2 code thats left front wheel sensor right?

 

did you check the pulser on the axle to be sure it wasn't damaged or missing?

 

That is the LF sensor. You might have a break in the wires somewhere. If you see a break, fix it. If you don't see anything:

Make sure the sensor is properly placed and the connector is secure. If that checks out:

Disconnect the sensor connector and check each wire for continuity between the speed sensor harness-side terminals and body ground. Repair whichever wire does not have continuity.

If that checks out, you may have a bad control unit.

 

Did you have that CV joint replaced recently? This happens all the time as non ABS axles will fit on your car and are missing the relucter. Then guess what happens. Hope it's that easy!

 

My abs light has been on for a while, will it damage anything if I don't have it looked at?

Sorry for thread jacking OP, but I was just curious.

 

No, The system will return to normal (Non ABS) braking.

 

well the thing is when i first got the car it never came one once in a blue moon as i drove it more it came on more often so i doubt its a broken wire.<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MooGoCow3 &raquo;</TD></TR><TR><TD CLASS="quote">did you check the pulser on the axle to be sure it wasn't damaged or missing?</TD></TR></TABLE>
is that the thing with the grooves cut in it? i didnt look at it closely but ill check it out. also could haveing different size tires effect it cause one of my back tires is taller than the rest. i just got some matching wheels but they need 2 tires. thanks for the help.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by e jay one &raquo;</TD></TR><TR><TD CLASS="quote">is that the thing with the grooves cut in it? </TD></TR></TABLE>

yup.

Having different size tires on the rear won't cause a problem with the front sensor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by e jay one &raquo;</TD></TR><TR><TD CLASS="quote"> also could haveing different size tires effect it cause one of my back tires is taller than the rest. i just got some matching wheels but they need 2 tires.</TD></TR></TABLE>
We just found where the light is coming from I think.
Your right about the ring too. But I bet your tire size is the problem. What sizes do you have on there?

 

If the ABS unit is getting an oddball sensor frequencey it can kick the code if it's too far off.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MooGoCow3 &raquo;</TD></TR><TR><TD CLASS="quote">If the ABS unit is getting an oddball sensor frequencey it can kick the code if it's too far off. </TD></TR></TABLE>

I think its more likely that the unit would throw a rear sensor code in that situation. The other 3 sensors should still have normal readings

 

If none of these things are repairing your problem, it could lead you to a faulty ABS controller.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93acclude &raquo;</TD></TR><TR><TD CLASS="quote">I think its more likely that the unit would throw a rear sensor code in that situation. The other 3 sensors should still have normal readings</TD></TR></TABLE>
In theory yea. It depends what tire sizes he has.

 

true, but most spare tires are smaller than regular and they wont throw codes. Nor will tires with low pressure. The unit may act differently with larger tires but im skeptical

 

he never said it was a spare he said the rear tire is taller

 

I never said he did. I was using it as an example.

 

both fronts are 165 65 14 and one rear left is 185 70 14. im gona check everything out later today.<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MooGoCow3 &raquo;</TD></TR><TR><TD CLASS="quote">If the ABS unit is getting an oddball sensor frequencey it can kick the code if it's too far off. </TD></TR></TABLE>
thats what i was thinking too.

 

True, Different tire sizes can affect ABS relucter/sensor readings, But this is an early Honda ABS system and not that complex. Continue to look for electrical problems. They're really not that hard.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MooGoCow3 &raquo;</TD></TR><TR><TD CLASS="quote">But I bet your tire size is the problem. What sizes do you have on there?</TD></TR></TABLE>
Isn't there a DIFFERENT code for unequal-size tires?

 

No. What the guys are saying is that different size tires will give a different reading, Just like your speedometer. The one relucter may turn a different speed than the others.

 

If the sensors are OK, different-size tires will cause code 3-12 in older systems, or code 71 in newer systems. The ABS controller can tell the difference between a bad sensor vs. the wheels turning different speeds.

I didn't realize that there was another even older system without that capability...

 

so either the pulser or broken wire.