Vw polo left indicator light stays on when lights are on

Probably the bulb.

More than likely its bulbs .

Your Corolla has daytime running lights (DRLs). A photocell determines whether it is day or night. Your DRLs turn on automatically in daytime without you operating the light control ("headlight") switch. Your DRLs are actually your headlights on low beam. At night, the photocell senses it is dark and disables the DRLs. When you set the light control ("headlight") switch to HEAD, the head relay closes and the headlights should turn on. Since they don't, I suggest opening the engine room junction block and checking the 40A MAIN fuse and the 10A LEFT HEAD (UPPER) and RIGHT HEAD (UPPER) fuses. In engine room relay block 5, check the 10A LH-LWR HEAD and RH-LWR HEAD fuses. Replace any blown fuses and the headlights should be working normally again

my polo 1.0 r reg has just lost all dash board any idea whats wrong with it please

you have a bad ground in the left taillight unit, so whenever lights are used the circuit loops back instead of going to ground, good luck to you

It sound like you have a grounding problem, does the headlight on the left seem dimmer than the right? Check the ground wires and the light sockets for corrosion.

make sure our lights at rear are grounded sounds like a bad earth

battery terminals loose?bad ground?short?

first clean throttle body out with carb cleaner and some clean cloth , if the throttle flap is dirty the car will stall

I bought a 2000 polo 1.4 yesterday after having an MOT. The warning lamp came on today but the car is running fine. Whether its the Lambda sensor or just the light itself is a common fault, I think garages turn off the lights to get it through the MOT then they come on again in a day or two!