u/lunaurelia

Hey everyone, just after some advice on a weird issue with my 2009 Mazda Demio 1.5L auto.

Couple months ago AT light originally came on and off intermittently and then stayed on. I took it to a mechanic who changed the transmission fluid. I thought that might fix it, but the light is still coming on.

I’ve also had it scanned with an OBD reader and no codes show up at all.

What’s strange is that it disappears when I’m going uphill.

The car itself drives completely fine with no issues or noise.

Next step will probably be replacing the TCM but I'm still in the process of looking for a replacement part.

Any advice appreciated.