ABS and brake light on and codes 24 and 22

Tiny
NASER NASER
  • MEMBER
  • 2006 SUBARU WRX
  • 4 CYL
  • TURBO
  • 4WD
  • MANUAL
  • 141,000 MILES
Bought the car listed above sti model, which has ABS and brake lights on, has these codes. Is it possible all are bad and were just ignored?
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Monday, March 30th, 2020 AT 2:23 PM

8 Replies

Tiny
KASEKENNY
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Normally not. Normally this is indicative of an ABS module issue. However, they are all related and the OEM has included them in one test which I attached.

We need to run through the test just to confirm the issue. Clearly there are other issues and possibly each one has failed but again, highly unlikely. I fully expect you will find one issue causing all these codes.

https://www.2carpros.com/articles/abs-wheel-speed-sensor-test

Let me know what you find. Thanks
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Monday, March 30th, 2020 AT 2:32 PM
Tiny
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They talk about gap adjusting. Is that using the spark plug gap? Because I saw a couple of them in the glove box.
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Monday, March 30th, 2020 AT 2:37 PM
Tiny
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Also, I doubt this has anything to do with it, has aftermarket wheels.
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Monday, March 30th, 2020 AT 2:42 PM
Tiny
KASEKENNY
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Yeah. The wheels will not effect this because the wheel speed sensors run off a sensor to a tone wheel.

The gaping does matter but you would not use a spark plug gap tool because it is a different style gaping. You would actually use spacers/washers on the base of the sensor to increase or decrease the gap.

Here is a 1980's style video that shows this really well:

https://youtu.be/AvQlHxZuVGw

I doubt this is the issue. If you are saying there are multiple other sensors in the glove box then I suspect they tried to replace them. Again, when having these different codes I suspect there is a module issue so we need to run through that testing just to find out where the issue is.

While it could be each sensor, I have never seen all these sensors fail at the same time which is why I suspect there is a greater issue.
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Tuesday, March 31st, 2020 AT 9:37 AM
Tiny
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No there aren't any extra sensors, just couple of spark plug gap adjusters.
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Tuesday, March 31st, 2020 AT 4:12 PM
Tiny
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Oh. I understand. Okay, unfortunately we will need to just run through the test to see what the issue. As I stated, I suspect you will find a possible ABS issue.
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Tuesday, March 31st, 2020 AT 5:39 PM
Tiny
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I just got a chance to drive it and live data shows rear ones showing speed while fronts are not.
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Monday, April 20th, 2020 AT 10:11 AM
Tiny
KASEKENNY
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Interesting. It is unlikely that both would fail but it is possible especially if this vehicle is new to you. They probably did not fail at the same time. They were just never fixed.

I attached the process but I doubt you need to remove much as you should be able to see the speed sensor on the hub and remove it with just taking the tire off.

Clearly I would inspect the sensor first to make sure they are there and connected. If they are replace them and retest.
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Monday, April 20th, 2020 AT 7:16 PM

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