Warning Light Issue

R_G929 · Post by **R_G929** » Wed May 04, 2016 5:27 pm

I originally had 17" alloys on my scirocco I have now fitted 18" and for some reason my ESC, ABS & Tyre pressure lights come on...? My VW alloys didn't have the tyre pressure valves so I've been told. What could the issue be?

Cuprabob · Post by **Cuprabob** » Wed May 04, 2016 6:08 pm

The TPMS doesn't use pressure sensors in the valve, it uses the wheel speed sensors. You should have reset the TPMS when you changed over the alloys but if that was the issue only one light would be on. Press and hold the reset button for approx 2 secs until you hear a chime.

My guess is one of the wheel speed sensors has been disturbed while changing over the wheels.

R_G929 · Post by **R_G929** » Wed May 04, 2016 7:03 pm

Hi there, I tried to reset it but the light just goes off for literally half a second and refuses to reset and no chime noise heard yet I'm holding it down for over 2 secs!! Vagcom said check rear left sensor (intermittent), I removed it cleaned it & fitted it. Then checked it to see if it measures speed and it's all good reading the same speeds as the other 3 sensors! Yet the lights still coming back ugh!! No idea what's causing it?

mackie01 · Post by **mackie01** » Wed May 04, 2016 9:50 pm

Would the tyre size bring the warning light on if they weren't the correct size ? As in if you were running 235/45/17 and went 235/45/18 ?

Paddy_R · Post by **Paddy_R** » Wed May 04, 2016 11:00 pm

Possibly, on 18s you should be running 235/40R18. It's going to change the rolling circumference of the wheels.

Viking · Post by **Viking** » Thu May 05, 2016 7:07 am

It wouldn't matter what size wheels and tyres were fitted, the system should be able to be reset to suit what's fitted. Rear left sensor sounds like it's causing an issue so I'd be looking there before mucking about with tyre sizes. Or swap the old wheels back on again to verify the fault is the car, not the wheels.

Roy_01 · Post by **Roy_01** » Thu May 05, 2016 9:53 am

That's correct it has to re-adapt on the new tyre measurements and carachteristics, just reset.

R_G929 · Post by **R_G929** » Thu May 05, 2016 2:42 pm

I've tried to reset it, it refuses to reset itself - not sure if this is due to the ABS fault as the left rear sensor isn't happy...? I've ordered a new sensor so I'll replace it when it comes, maybe that will fix the issue?

Viking · Post by **Viking** » Thu May 05, 2016 3:00 pm

Yes, it'll be related to the ABS fault.

R_G929 · Post by **R_G929** » Fri May 06, 2016 11:50 am

Maybe the car needs a different code for 18" wheels? not 100% sure...?

Cuprabob · Post by **Cuprabob** » Fri May 06, 2016 11:53 am

R_G929 wrote:Maybe the car needs a different code for 18" wheels? not 100% sure...?

No...

Have you double checked that tbe tyre size on the offending corner is the same as all the other 3 corners.

R_G929 · Post by **R_G929** » Fri May 06, 2016 1:22 pm

Replaced the ABS sensor, ABS & Sterring light gone - just have tyre pressure & ESC Light on no idea what that could be?

Roy_01 · Post by **Roy_01** » Fri May 06, 2016 7:29 pm

Can you make a new scan with vcds? Does it give the same fault code? Maybe you have to reset the fault code directly in the abs controller, this is also the case with engine fault codes.

R_G929 · Post by **R_G929** » Fri May 06, 2016 9:57 pm

Driving along today and the ABS & Steering light came on again! Have no clue what it could be now!

Viking · Post by **Viking** » Sat May 07, 2016 9:20 am

Might be the sender ring on the hub, or damaged wiring maybe.

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