B1609 on Kia
Illuminated Entry Input Short Circuit to Battery
B1609 on Kia vehicles indicates illuminated entry input short circuit to battery. Au7o has documented this code across 1 Kia model — most commonly on K5. This is a manufacturer-specific (Ford-family) body code relating to the illuminated entry system, which turns on the interior courtesy lights when you unlock or open a door. The body control module detected an abnormally high voltage on that input circuit, consistent with a short to battery (power) voltage. It is generally a convenience-lighting fault and does not affect how the vehicle drives, though it can cause lights to misbehave or drain the battery. Exact meaning can vary by manufacturer.
Common Causes of B1609
- •Short to power in the illuminated entry or courtesy lamp wiring
- •Faulty or stuck door ajar / door jamb switch
- •Chafed or pinched wiring in a door harness
- •Corroded or damaged connector at a door switch
- •Faulty keyless/illuminated entry module
- •Faulty body control module
B1609 on Kia by Model
Kia K5(1 issue)
- Infotainment Screen Blackout and Random Reboots2021-2025
The K5 infotainment system — both the 8-inch and 10.25-inch displays — experiences random screen blackouts, freezes, and spontaneous reboots. The screen may go completely black while driving, losing access to navigation, backup camera, and climate controls. Some owners report the system rebooting in a loop. The issue is typically software-related but can also be caused by a failing display head unit. Android Auto and Apple CarPlay connections can trigger or worsen the problem.
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View B1609 across all makes →Frequently Asked Questions
What does B1609 mean on Kia?▼
B1609 stands for "Illuminated Entry Input Short Circuit to Battery." This is a manufacturer-specific (Ford-family) body code relating to the illuminated entry system, which turns on the interior courtesy lights when you unlock or open a door. The body control module detected an abnormally high voltage on that input circuit, consistent with a short to battery (power) voltage. It is generally a convenience-lighting fault and does not affect how the vehicle drives, though it can cause lights to misbehave or drain the battery. Exact meaning can vary by manufacturer. On Kia specifically, this code is documented across 1 model.
What causes B1609 on Kia vehicles?▼
Common causes on Kia: Short to power in the illuminated entry or courtesy lamp wiring, Faulty or stuck door ajar / door jamb switch, Chafed or pinched wiring in a door harness, Corroded or damaged connector at a door switch, Faulty keyless/illuminated entry module. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B1609 on a Kia?▼
Repair costs vary widely depending on the root cause and specific Kia model.
Which Kia models have B1609 documented?▼
Au7o has documented B1609 on 1 Kia model: K5.