B1609 on 2021-2025 Kia K5 — Illuminated Entry Input Short Circuit to Battery
1 vehicles · 1 makes
Most Reported On
B1609 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2021-2025 Kia K5.
Common Causes
Diagnostic Tools
To diagnose B1609, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
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A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
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BlueDriver Pro Bluetooth Scanner
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Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
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LAUNCH CRP123X OBD-II Scanner
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A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
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Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
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FAQ
What does B1609 mean?
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.
What are the most common causes of B1609?
The most common causes of B1609 are: 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. The specific cause varies by vehicle.
How much does it cost to fix B1609?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by B1609?
Au7o has documented B1609 across 1 vehicle models from 1 manufacturers: Kia.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.