A quick demonstration on how to change the battery one a Nissan Qashqui Key Fob This was on a 2014 keyless fob. Alex Ball. Nissan Qashqai Key Fob Not Working After Battery Change. If the key fob isn't working after the battery has been changed, it could be the battery is dead or not properly seated. Remove and then re-insert the battery to see if it solved the problem. Learn about intelligent key battery replacement. Browse the manual to learn all about your 2023 Nissan Qashqai e-POWER. Vehicle Ahead Detected warning light (where fitted) 5.2.3. Indicator lights. 5.2.3.1. Automatic brake hold indicator light (white) 5.2.3.2. Automatic brake hold indicator light (green) One of the most common reasons why Nissan key fob not working after battery change is installing a new battery backwards, or buying a faulty NEW battery. This article gives you some tips to get your keyless key fob working after changing the battery. Try this:-. To start, sit in your car with the doors closed and the ignition off. Next, press and hold the lock and unlock buttons on your key fob for about 15 seconds. After that, press the lock button for one second, then release it and press the unlock button for one second. GAu2My.