[Red Chris 96]

My TPMS has been in since I had 4 new tyres on. The mobile tyre fitter has been out twice but couldn’t sort it and wanted ridiculous money to replace sensors. Just seen this post and gave it a try. It’s only gone and worked. I’m made up. Thank you Big John Sparky.

 

[Red Chris 96]

How much do you need to increase or decrease pressure? Mines was right down to 10 psi and still no horn

I let mine down to 28 and then went back up until the horn sounded. It worked perfectly. If you’re using a compressor that comes with the car they’re not always accurate so don’t worry if it shows it’s getting nearer to 40 as it’ll likely be much lower.