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24th August 2019, 18:33 | #1 |
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Vauxhall Insignia CDTi; MG TF 135 Join Date: Jan 2010
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ABS/speedo problem?
Was driving along earlier today when I heard a faint tapping from under the front of the car somewhere – shortly after that, the ABS light came on. Car’s driving normally, but the light has come and gone all day (mostly come).
This all happened a long way from home. As I was driving back, suddenly the speedo needle dropped to 0. It stayed there a long time, then began a pattern of slowly climbing up to 30 or 40 (I was doing 70 or so), then dropping back to 0 again for a while. Them every so often, it would indicate my correct speed (amazing at how good I proved to be at guessing!) Do these symptoms indicate a single fault, or worse? Any advice appreciated. PS don’t know if it’s relevant, but about ½ an hour before it happened, the front o/s wheel got a bit of a thump in a pothole… Ta
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24th August 2019, 20:30 | #2 |
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ABS sensor, right hand front wheel.
Tim |
24th August 2019, 21:27 | #3 |
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What Tim says. I had it on my first 75. The fuel gauge can actcweird with it as well, bizarrely!
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24th August 2019, 21:34 | #4 |
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Thanks chaps. Yes haven't had the fuel gauge (I think) but the Range went up to 750 miles at one stage, on less than ½ a tank... then back to normal a bit later.
I've read a whole pile of posts since posting, and I was cautiously coming to that conclusion, but best to hear it directly. I wonder if the pothole could have dislodged something... anyway, sounds like it's relatively safe to drive till the man with the T4 gets back from his honeymoon
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24th August 2019, 22:58 | #5 |
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You don't need a T4 check, just fit a replacement OSF ABS sensor.
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25th August 2019, 07:22 | #6 | |
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Quote:
Cheers. I need him to do the job for me though
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25th August 2019, 10:31 | #7 |
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Or... could I do it myself? Realise that's hard for anybody else to answer, but it would really depend on how much dismantling would be needed. Don't fancy much more than taking the wheel off!
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25th August 2019, 10:39 | #8 |
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Depends really on a) if it’s just the sensor or b) the bearing playing up, and how much the existing sensor likes its home. Sometimes these sensors don’t like being evicted and need to be drilled out (without damaging the bearing!). You could try unbolting the sensor and see if it comes out (I doubt it) and if it does then it’s very easy to fit a new one. Otherwise it’s much more than just a wheel off job.
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26th August 2019, 14:53 | #9 |
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Just in case it turns into a pig of a job, and whilst the speedo is still working - take it for a run and note down what revs and what gear you need to be in to keep within speed limits.......or keep your sat nag switched on when driving.
I'd also check the cable and connections are good before attempting to remove the sensor. |
26th August 2019, 15:18 | #10 | ||
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Quote:
Already noted Quote:
Yes, thinking that, as it happened after banging the front wheel… is it obvious where the sensor is when you take the wheel off?
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