Bulb, Ballast and Carista OBD II

[Bee8point5]

Passenger side bulb intermittently failing with code on dash. After car sat for a bit...BOTH headlights ignited on start up. Passenger side bulb (one that failed during driving today) definitely has a very slight yellow tinge. Question is will Carista OBD II simply tell me its the bulb vs the ballast, and in general would you guys be leaning towards the bulb (particularly given the onset of yellowness)?

[Bee8point5]

Passenger side bulb intermittently failing with code on dash. After car sat for a bit...BOTH headlights ignited on start up. Passenger side bulb (one that failed during driving today) definitely has a very slight yellow tinge. Question is will Carista OBD II simply tell me its the bulb vs the ballast, and in general would you guys be leaning towards the bulb (particularly given the onset of yellowness)?

Sorry vehicle is 2014 Vintage with 60,000 miles with may-be three quarters of its life garage park and rest outside.

[Smac770]

The bulb and ballast are downstream basic electrical devices from the J519 BCM (09-central electrics) control module. The J519 will unlikely have any idea if the downstream issue is due to the bulb or the ballast, as it doesn't really communicate with them. It just sends 12v when it wants it on.

If you want to isolate bulb vs ballast, move one to the other headlamp. If the issue moves, the issue is with whatever you moved. If the issue doesn't move, then issue is not likely with whatever you moved.

[audrobotic]

Sounds like the bulb. At around 75k the dash warning light went on. It was intermittent, one day it seemed fine, then next day dash light went on. Replaced it with Philips 42302C1 D3S. Some say replace both sides because they wear out the same, but whatever, that was 15k miles/ three years ago, the other bulb is fine.