Kia B260B means the right rear turn signal lamp circuit is open — the Body Control Module (BCM) has detected a break in the circuit supplying the right rear indicator, causing it to fail or flash at an incorrect rate.
What B260B means
The Body Control Module in Kia vehicles continuously monitors the current draw of each exterior lamp circuit. When the right rear turn signal lamp is commanded on, the BCM measures the current flowing through that circuit and compares it against an expected range. An open circuit — meaning current cannot flow through the lamp path at all — stores B260B. The most common cause is a blown or open bulb filament (on incandescent systems) or an LED module failure (on LED rear lamp assemblies). On modern Kia models using LED rear lamps (Sportage QL/NQ5, Sorento MQ4, Stinger CK), the LED driver module inside the rear lamp assembly is the component that fails rather than an individual bulb. The BCM also detects open circuits caused by broken wiring between the BCM output and the rear lamp connector, or by a corroded lamp connector. A side effect of an open circuit in the indicator circuit is hyper-flash — the remaining indicators flash at double speed when the circuit resistance doubles because of the missing lamp load.
Symptoms
- Right rear turn signal not illuminating when the indicator stalk is activated
- Remaining indicators (front right, dashboard) hyper-flashing at double speed due to missing rear lamp load
- B260B stored in the BCM fault log
- Turn signal dashboard indicator may remain on steady or flash at an abnormal rate
- No other lighting or electrical faults in most cases (B260B is isolated to the right rear indicator circuit)
Common causes
- Failed bulb — open filament in the right rear turn signal bulb on incandescent-lamp models (Picanto, Rio, older Ceed generations)
- Failed LED module inside the right rear lamp assembly on LED-lamp models — LED drivers can fail due to moisture ingress or electrical stress
- Open circuit in the wiring harness between the BCM and the right rear lamp connector — chafed wire at the boot lid hinge is a common point
- Corroded or loose connector at the right rear lamp housing — particularly on vehicles in salt-belt regions or with a history of rear lamp removal/replacement
- BCM output fault — the BCM internal driver for the right rear indicator has failed (uncommon but possible after a previous short circuit)
Diagnostic approach
- Inspect the right rear turn signal bulb or LED module — Access the right rear lamp assembly (typically from inside the boot). On incandescent models, remove and visually inspect the indicator bulb for a broken filament. On LED models, inspect the LED lamp cluster for moisture or cracked lens seals that may indicate water ingress to the LED driver. Replace any visibly failed component first.
- Test the lamp circuit voltage at the rear lamp connector — With the indicator activated, use a multimeter to check for battery voltage at the indicator feed pin of the right rear lamp connector. If voltage is present at the connector but the lamp does not illuminate, the fault is in the lamp assembly itself. If no voltage is present, trace the wiring from the BCM output to the connector.
- Inspect the harness at the boot lid hinge and rear bumper entry points — On Kia Sportage QL/NQ5, Sorento MQ4, and Ceed SW/ProCeed, the rear lamp harness runs through the boot lid hinge or along the rear bumper. These sections flex repeatedly and can develop open circuits at high flex points. Flex the harness by hand while monitoring continuity to locate intermittent breaks.
Make & model notes
Kia: Sportage NQ5 (2022-2025): the rear LED lamp clusters on this model have an integrated LED driver module that is not user-replaceable as a bulb. When B260B appears on NQ5, the full right rear lamp assembly typically requires replacement. Verify this is covered under Kia's LED lamp warranty extension if applicable in your market.
Kia: Ceed CD (2018-2023) and ProCeed CD: on these models the boot lid hinge harness is a known wear point for rear lamp open circuits. Before replacing the lamp assembly, flex the harness at both hinges while checking lamp continuity — this can save an unnecessary part replacement.
FAQ
Why is hyper-flash happening alongside B260B on my Kia?
Hyper-flash occurs because the indicator flasher unit detects a lower-than-normal current load when a lamp is missing or open. On incandescent systems this is intentional — the rapid flash warns you that a bulb has failed. On modern Kia models with LED lamps and BCM-controlled indicator timing, the BCM may also flash faster as a driver warning. Fix B260B by repairing or replacing the lamp, and hyper-flash will stop.
Can I drive with B260B?
A non-functional right rear indicator is a legal requirement in most countries and creates a road safety hazard for following traffic. B260B should be repaired promptly. The repair is typically straightforward — bulb replacement on older models, lamp assembly on LED models.
Will B260B clear itself after I replace the bulb?
On many Kia models the BCM will clear B260B automatically after a number of successful indicator cycles with the new lamp in place. If it does not clear after a drive cycle, use a scan tool to manually clear it and verify the right rear indicator now functions normally.