C1A93-14 right rear wheel speed sensor

[kev100]

Hi,

So I have the ABS light and anti skid light come on the dash, had a scan and come up with the code C1A93-14 right rear wheel speed sensor

Now I have had a slow puncture on that trye for several months (it quite often goes down to 20PSI and I am pumping it up maybe every couple weeks), and yes I know I should have gotten it changed,

I have read that flat tyres (and even tryes spinning in icy condistions) can trigger this fault.

So my question, how likely is it that a deflated tyre is triggering the fault.

I have previously repaired corroded cables to the sensors, and cheched these and they are still good.

My plan is to get a new tryre the weekend (I am assuming the warning light will have to be programmed out) and then give it a test.

p.s. also got a fault coming up with the brake resevior level sensor, but assuming this in not the culprit

Thanks in advance for your help

[loot]

C1A93:14-2B which is open or short to ground, on rear right ABS sensor.

A flat tyre if it does cause the fault will clear at ignition cycle.

A dct light as above is a broken wire or something.

If you swap the wheel to the other side and it is the tyre flat causing the fault then you'll get the code on that side.

Check the wiring again and maybe the reluctor ring for damage etc.

A decent fault reader and possibly forscan will give live data on all 4 sensors and you can go for a drive and see if they all show similar readings.

[andz327]

C1A93:14-2B which is open or short to ground, on rear right ABS sensor.

A flat tyre if it does cause the fault will clear at ignition cycle.

A dct light as above is a broken wire or something.

If you swap the wheel to the other side and it is the tyre flat causing the fault then you'll get the code on that side.

Check the wiring again and maybe the reluctor ring for damage etc.

A decent fault reader and possibly forscan will give live data on all 4 sensors and you can go for a drive and see if they all show similar readings.

Are you sure its the abs sensor wire you've repaired previously and not the brake pad wear sensor

ANDZ

[kev100]

C1A93:14-2B which is open or short to ground, on rear right ABS sensor.

A flat tyre if it does cause the fault will clear at ignition cycle.

A dct light as above is a broken wire or something.

If you swap the wheel to the other side and it is the tyre flat causing the fault then you'll get the code on that side.

Check the wiring again and maybe the reluctor ring for damage etc.

A decent fault reader and possibly forscan will give live data on all 4 sensors and you can go for a drive and see if they all show similar readings.

Are you sure its the abs sensor wire you've repaired previously and not the brake pad wear sensor

ANDZ

Yep, both sensors wires N/S at the rear axle, had the abs warning lights come on 2 times before at different times, and each time those wires were corroded, one at the plug, the other had aprevious repair that had gone bad, both times once I had cleaned and resoldered the wires the warning lights went off. This is the third time now the warning light has come on (a couple years since the last repair) ..

[loot]

And the repair is on the loom before the sensor wire yes? The sensor wire itself shouldn't be repaired.

[kev100]

And the repair is on the loom before the sensor wire yes? The sensor wire itself shouldn't be repaired.

I think it is .. been a couple years since I did the last repair, I will have a good look tomorrow just to refresh my memory

[loot]

The sensor wires are more plastic feeling and not really easy to solder etc, it says not to cut or repair them as it changes the resistance and stimulates being broken.

[kev100]

The sensor wires are more plastic feeling and not really easy to solder etc, it says not to cut or repair them as it changes the resistance and stimulates being broken.

Its worked fine for the last couple years since I repaired them, only seemed to come on since I have had the slow puncture (and running it on a part inflated tyre sometime (yes I know thats a bad thing to do)

But have read on several sites that a deflated tyre can throw up an error because the wheel doesnt spin at the same rotation as the other wheels, hence the original question.

Going to get a new tyre put on the weekend in any case, but will double check all the wiring again, and possibly change the rear right sensor anyway

[loot]

It could be the tyre but that will only cause the light to come on at speed and won't be on when you restart the key.

It will generate a soft code in other words.

The system does a scan and when you turn the engine on there are no problems.

A faulty wire will instantly throw a fault code. It may stay there all the time.

[kev100]

It could be the tyre but that will only cause the light to come on at speed and won't be on when you restart the key.

It will generate a soft code in other words.

The system does a scan and when you turn the engine on there are no problems.

A faulty wire will instantly throw a fault code. It may stay there all the time.

Thanks for reply, so I will be checking a few things over the weekend.

Just on another note, I have bought 4 new injectors and will replace the old ones .. I understand they need to be coded ... is the FORscan software able to code the injectors ?

[knobby1]

Just on another note, I have bought 4 new injectors and will replace the old ones .. I understand they need to be coded ... is the FORscan software able to code the injectors ?

Yes..!

Lord Knobrot

[andz327]

Ma abs spat the dummy oot today , nsr abs ring elfookod

ANDZ

[knobby1]

Ma abs spat the dummy oot today , nsr abs ring elfookod

ANDZ

Is it fixed yet..??

Lord Knobrot

[kev100]

Just on another note, I have bought 4 new injectors and will replace the old ones .. I understand they need to be coded ... is the FORscan software able to code the injectors ?

Yes..!

Lord Knobrot

All injectors fitted and programmed in, tourqued the bolts down to 6 and 180, on the way back home engine rattling like a bag of nails, one of the bolts came loose ... had to pull over, get a lift home then come back and sort the bolt out .. frustrated, but all ok now .. sounds and feels well smoth now ... need to wait for a frosty morning so I can test the remote engine start to see if it starts and keeps running, cutting out and not defrosting my van was one of the reasons for the change of injectors (along with rough tickover and rough running sometimes).

Do I also need to do an injector pilot correction learn routine too ?

Checked all wires to the ABS sensors and they all look good, so probably a sensor, will remove it over the weekend and do some tests, but may just get a replacement anyway.

[knobby1]

Do I also need to do an injector pilot correction learn routine too ?

Yes, this is a must do item as the system needs calibration after fitting new injectors. If not done it will never run well.

You need to reset the PRV couter values, then do pump, pilot and injector learns. If the SCV and PRV aren't well, it won't pass successfully.

Lord Knobrot