Front left ABS Speed sensor error

[dotRobby]

For context, I got an Audi A4 B8 2009 with the 2.0 TFSi Engine.

Did an error code scan on my car, due to the ABS and ESP being disabled.

The error reads:

00283 - ABS Wheel Speed Sensor; Front Left (G47)
012 - Electrical Fault in Circuit - MIL ON
Freeze Frame:
Fault Status: 11101100
Fault Priority: 2
Fault Frequency: 1
Reset Counter: 81
Mileage: 130441 km
Time Indication: 0
Date: 2018.01.09
Time: 03:59:46


Do anyone happen to know what the more specific and likely cause is to this?

Thanks in advance!

[Gunnark100]

Nothing more to say:
http://wiki.ross-tech.com/wiki/index.php/00283

[dotRobby]

Nothing more to say:
http://wiki.ross-tech.com/wiki/index.php/00283

There's no solution/cause to the "Electrical Fault in Circuit" section though. Already looked there :p

Was hoping for someone with the same issue to know what to look for (if there's any common causes)

[Iridium.]

The possible causes and possible solutions for Electrical Fault in Circuit, Open or Short to Plus and signal falls outside of spec all apply. They are all electrical issues that can occur either with the sensor itself, with the wiring for the sensor or with the module.

Possible Causes
Open Circuit in Wiring from/to ABS Wheel Speed Sensor Front Left (G47)
ABS Wheel Speed Sensor Front Left (G47) faulty
Brake Electronics Control Module (J104) faulty

Possible Solutions
Check/Repair Wiring from/to ABS Wheel Speed Sensor Front Left (G47)
Check/Replace ABS Wheel Speed Sensor Front Left (G47)
Check/Replace Brake Electronics Control Module (J104)

Start diagnosing by process of elimination. Get underneath the vehicle with the front left wheel off and check to see if theres any buildup or debris on the sensor, or on the backside of the wheel bearing housing where the tone/pickup ring for the wheel speed sensor is. You can remove the sensor and inspect it for damage to the connector. Unfortunately I don't have electrical specs for the sensor.



You should be able to view the wheel speed sensor output with VCDS. Try graphing the signals and see if the patterns match. If the front left waveform is more jagged than the other 3 or there's no pattern at all you may need a sensor.

I'm currently dealing with this issue myself and I'll try and keep you updated on what I find. Although I also have the added mechanical malfunction associated with mine, but still have a signal/waveform pattern when graphing mine.

[joeobrien22]

For context, I got an Audi A4 B8 2009 with the 2.0 TFSi Engine.

Did an error code scan on my car, due to the ABS and ESP being disabled.

The error reads:

00283 - ABS Wheel Speed Sensor; Front Left (G47)
012 - Electrical Fault in Circuit - MIL ON
Freeze Frame:
Fault Status: 11101100
Fault Priority: 2
Fault Frequency: 1
Reset Counter: 81
Mileage: 130441 km
Time Indication: 0
Date: 2018.01.09
Time: 03:59:46


Do anyone happen to know what the more specific and likely cause is to this?

Thanks in advance!

What ended up being your issue? I just replaced my sensor to no avail. I don't really have long enough leads or an Erwin subscription so I'm just trying to find most common causes. Might go ahead and replace abs/eps module next.

[bb-tt]

I had similar issue on TT, sensor ring was clogged with what i can only assume was metallic brake dust.

[captain_video]

I've had to get the Bosch ABS units repaired on every Audi and VW I've ever owned and I've owned four VWs and four Audis. The only ones that I haven't had to get the ABS units repaired yet are both 2014 Audi models so they don't have enough miles on them yet for the fault to occur. I don't know if the B8 still uses Bosch units, but in my experience it's only a matter of time before they fail. The wires inside the control unit are extremely fine and will become brittle and break over a long period. There are lots of places that will repair them for a nominal fee. You'll usually get both the ABS and brake light fault indications on the dash and they will flash on and off, IIRC.

I'm not saying that this is the issue you're having, but it is a possibility. I would definitely perform the troubleshooting steps suggested above before pulling the ABS unit for repair. The fact that you're getting a specific code for the sensor shows that it's probably either a bad sensor, broken wire, or something that's impeding the signal from the wheel to the control unit.

[joeobrien22]

I've had to get the Bosch ABS units repaired on every Audi and VW I've ever owned and I've owned four VWs and four Audis. The only ones that I haven't had to get the ABS units repaired yet are both 2014 Audi models so they don't have enough miles on them yet for the fault to occur. I don't know if the B8 still uses Bosch units, but in my experience it's only a matter of time before they fail. The wires inside the control unit are extremely fine and will become brittle and break over a long period. There are lots of places that will repair them for a nominal fee. You'll usually get both the ABS and brake light fault indications on the dash and they will flash on and off, IIRC.

I'm not saying that this is the issue you're having, but it is a possibility. I would definitely perform the troubleshooting steps suggested above before pulling the ABS unit for repair. The fact that you're getting a specific code for the sensor shows that it's probably either a bad sensor, broken wire, or something that's impeding the signal from the wheel to the control unit.

I just tested signal wire to control unit, it's reading fine, I'm not sure what conditions the +wire is getting power so I can't test accurately, but now that i've replaced the parking brake module, sensor, and checked wire. I'm guessing abs control module is next.

Do you happen to know best way to test the + wire for the sensor?

[joeobrien22]

Also possible the new sensor is bad I suppose, wouldn't be the first time...

[bb-tt]

I've had to get the Bosch ABS units repaired on every Audi and VW I've ever owned and I've owned four VWs and four Audis. The only ones that I haven't had to get the ABS units repaired yet are both 2014 Audi models so they don't have enough miles on them yet for the fault to occur. I don't know if the B8 still uses Bosch units, but in my experience it's only a matter of time before they fail. The wires inside the control unit are extremely fine and will become brittle and break over a long period. There are lots of places that will repair them for a nominal fee. You'll usually get both the ABS and brake light fault indications on the dash and they will flash on and off, IIRC.

I'm not saying that this is the issue you're having, but it is a possibility. I would definitely perform the troubleshooting steps suggested above before pulling the ABS unit for repair. The fact that you're getting a specific code for the sensor shows that it's probably either a bad sensor, broken wire, or something that's impeding the signal from the wheel to the control unit.

yes that would be the last thing after i eliminated everything else. Thanks for pulling all those bad abs units out of the pool for us, knock on wood i have not had one go bad yet.

[captain_video]

Just out of curiosity, has the sensor ever been pulled for any reason, such as removing the drive axle? I'm thinking that perhaps it may not be fully seated and is giving an erroneous reading. If it's not in close enough proximity to the axle shaft to read the fluctuations in the circumference of the axle then that could be a potential issue.

[Slick_B8]

I had this issue. Was throwing codes for the wheel sensor, abs module, etc. Come to find out, my battery was soooooo low/bad, it wouldn't give sufficient power to those modules which in turn gave a bad abs module code and bad abs sensor code

[Poddybrennan]

I have the same issue.. a4 b8 tdi .. I was getting abs and traction and parking break malfunction light on the dash.. I replaced the sensor passenger side front to no avail.. plugged into vcds and its giving me the "fault in circuit" code

Also I seen mentioned above about tail lights maybe throwing up the abs fault? Can anyone shed some light?

[Tusktopia]

same issue here too, abs control module faults causing esp, suspension, and parking brake faults. Just double checked all the fuses. Just had body work done so I’m hoping it’s just the sensor not the abs. ECS wants over 2k for the control module new.