We know, most LEDs may cause hyper flash & error code when they are replaced on the turn signal lights due to LEDs low-consumption, energy-saving performance. If there isn’t enough resistor value to meet car computer, extra resistor decoders will be needed.

Now, there is a good solution to abandon annoying resistor decoders. Our new version CANBUS 1156 will meet your need. TOPCITY is the first brand on the market to publish built-in CANBUS Amber & Switchback LED turn signal lights, when most products of LED are not canbus error free on the automotive aftermarket. We are confident that these bulbs would give you an extraordinary driving experience!

When you are installing p21w led bulb,you will catch the euro error code problem like this way.

TOPCITY HAVE DESIGNED AND PRODUCED THIS SUPER POWER CANBUS BULB MORE THAN 3 YEARS

WE CAN SOLVE THE CANBUS PROBLEM.