2023 Kia Sportage Transmission Wire Harness Issue TSB SA499

Symptoms

Owners of affected 2023 Kia Sportage vehicles may experience several noticeable symptoms related to the transmission wire harness issue. The Malfunction Indicator Lamp (MIL) may illuminate on the dashboard, signaling a problem. You might also notice that the vehicle defaults into 5th gear, which can lead to significantly slower acceleration and reduced performance.

Fault Codes / DTCs

The transmission wire harness issue can trigger specific Diagnostic Trouble Codes (DTCs). Technicians may find the following codes stored in the vehicle's system:

• P07XX (a range of transmission-related fault codes)
• P0880 (TCM Power Input Signal)

These codes indicate an electrical fault within the transmission control system, often stemming from the chafed wiring.

Diagnosis / Trigger Conditions

The root cause of this problem is the transmission wire harness rubbing against the shift cable bracket bolt. Over time, this friction can chafe the wiring, creating an intermittent ground. This electrical short can cause the Malfunction Indicator Lamp (MIL) to activate and trigger DTCs P07XX and P0880. When this occurs, the vehicle's transmission may enter a default mode, specifically locking into 5th gear, which impacts drivability and acceleration.

Repair Procedure Summary

To address the 2023 Kia Sportage transmission wire harness issue, technicians follow a specific procedure. First, the battery and the Engine Control Module (ECM) are carefully removed to gain access to the transmission wire harness. Next, the transmission control harness clip is detached, and two transmission connectors are disconnected.

The technician then identifies the specific area of the harness that is prone to rubbing against the shift cable bracket bolt. A 90mm (3.5-inch) piece of high-temperature (275°F) 1/2-inch (13mm) plastic conduit flex tubing is cut and used to cover this vulnerable section of the harness. This protective tubing is then secured along its entire length with high-temperature 3M™ electrical tape. If any existing wire insulation damage is found, it must be wrapped with electrical tape before applying the conduit and tape. Finally, all removed components are reinstalled, and the technician confirms that the control harness is no longer in contact with the shift cable bracket bolt, ensuring proper operation of the vehicle.

Required Tools or Parts

To perform this repair, specific materials are needed:

• Plastic Conduit 1/2" Flex Tubing: Approximately 90mm (3.5 inches) in length, rated for high temperatures (275°F). While a part number (FLX-5007T) is referenced, dealers are instructed to source this locally.
• High-Temperature 3M™ Electrical Tape: Rated for high temperatures (221°F). Dealers are instructed to source this locally.

Owner Action

If you own a 2023 Kia Sportage and experience symptoms such as the Malfunction Indicator Lamp (MIL) illuminating, diagnostic trouble codes P07XX or P0880, or your vehicle defaulting to 5th gear with slow acceleration, you should contact your authorized Kia dealer. This is a Service Action (SA499) and is performed without customer notification during the warranty period. The repair will be covered under warranty, and your dealer can check your VIN to confirm if your vehicle is included in the affected list.

Important Warnings

Kia has issued specific instructions and warnings regarding this service action:

• "A Service Action is a repair program without customer notification that is performed during the warranty period. Any dealer requesting to perform this repair outside the warranty period will require DPSM approval."
• "Confirm that no other connectors are detached in the surrounding work areas."
• "Ensure that ALL related and surrounding connectors are inserted securely during re-assembly. A softset or poor connection may cause a no start condition."

NHTSA ID: 10212176