C1513: How to Diagnose & Fix — Manufacturer-Specific Chassis Code (Hyundai/Kia: Left Rear Wheel Pressure Reduction Malfunction)
3 vehicles · 1 makes · $150-$2,500 repair
How to diagnose and fix C1513: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Kia Sorento · 2011–2020
The electronically-controlled AWD coupling (transfer case) in Sorentos fails due to worn clutch packs inside the coupling unit. The coupling is responsible for distributing torque to the rear wheels and uses a multi-plate clutch actuated by an electric motor. When the clutch packs wear out, the system cannot engage the rear axle properly, resulting in a grinding noise, vibration, and loss of AWD functionality. The coupling fluid also breaks down over time if not changed.
Common Symptoms
- Grinding or growling noise from under the vehicle
- Vibration felt through the floor during turns
- AWD warning light illuminated on dashboard
- Vehicle feels like it is binding during tight turns
- Loss of traction in conditions where AWD should engage
How to Fix
Replace the AWD coupling assembly (also called the power transfer unit or electronic coupling). Change the coupling fluid (Kia specifies a specific coupling fluid, not standard gear oil) every 30,000 miles as preventive maintenance. If caught early, some couplings can be rebuilt with new clutch packs, but most shops replace the entire unit. After replacement, perform an AWD system relearn procedure with a KDS (Kia Diagnostic System) scan tool.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Kia 47810-3B520 4WD hydraulic actuator motorOEMKia 47810-3B520
Vendor requires VIN confirmation before shipping.
- Genuine Kia 47800-3B520 4WD coupling assemblyOEMKia 47800-3B520
Confirm VIN and do not use for the CHA047 actuator-only DT
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Kia Sportage · 2017–2023
AWD-equipped Sportages develop a humming, growling, or grinding noise from the rear differential coupling unit. The electronically-controlled clutch pack coupling wears internally, and the coupling fluid degrades from heat. The noise increases during turns and low-speed maneuvering. If ignored, the coupling can fail completely, leaving the vehicle in front-wheel-drive only mode.
Common Symptoms
- Humming or growling from rear during turns
- Grinding noise from rear at low speeds
- Vibration through the floor during acceleration
- AWD warning light on dashboard
- Clunking from rear when shifting from reverse to drive
How to Fix
Drain and refill the rear differential coupling fluid with Kia-specified coupling fluid (not standard gear oil). If noise persists after fluid change, the coupling unit requires replacement. The coupling unit is separate from the rear differential and can be replaced independently. Perform a coupling relearn procedure with the Kia Diagnostic System after replacement. Change coupling fluid every 30,000 miles as preventive maintenance.
Sources for this issue (1)
Kia Sedona · 2007–2007
The Sedona IS named in the Hyundai-Kia-wide brake-light switch campaign. Stop lamp switches supplied by INFAC were damaged during supplier assembly, letting the plunger inside the threaded shaft stick. The consequences are broader than a dead brake light: cruise control may not cancel when the driver brakes, the brake-transmission shift interlock may refuse to release the shifter from Park, push-button start may work only intermittently, and the ESC malfunction lamp can illuminate. Kia's 2013 recall (NHTSA 13V-114), part of the roughly 1.7 million-vehicle Hyundai/Kia action, lists 2007 Sedona alongside 2007-2010 Rondo and Sportage, 2007-2011 Sorento, 2010-2011 Soul, and 2011 Optima. A separate earlier Sedona campaign, 06V-349, covered a damaged brake-light WIRING HARNESS — a different defect on the same circuit, so confirm which applies to a given VIN.
Common Symptoms
- Brake lights do not illuminate when the pedal is pressed
- Brake lights stay on with the pedal released
- Shifter will not come out of Park with the brake pressed
- Cruise control does not disengage on braking
- ESC/traction warning lamp illuminated
- Push-button start works only intermittently
How to Fix
Free replacement of the stop lamp switch under NHTSA 13V-114 for covered 2007 vans. Outside the recall population the switch is an inexpensive part behind the brake pedal and a common cause of the same symptom set on other Sedona years — replace it before chasing the shift interlock solenoid or the ESC module. Confirm brake lamp operation at the pedal, not just at the third brake light.
Sources for this issue (4)
- NHTSA Recall 13V-114 acknowledgement — Hyundai/Kia stop lamp switcharticle
- Hyundai/Kia Recall 1.7 Million Vehicles for Rollaway Risk, Brake-Light Problem — Edmundsarticle
- Kia and the Breaking Brake Switch That's Been Broken — Safety Research & Strategiesarticle
- NHTSA Recall 06V-349 — Kia Sedona damaged brake light wiring harnessarticle
Find C1513 by make
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C1513 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does C1513 mean?
C1513 stands for "Manufacturer-Specific Chassis Code (Hyundai/Kia: Left Rear Wheel Pressure Reduction Malfunction)." C1513 is a manufacturer-specific chassis/ABS code. On Hyundai and Kia vehicles it generally indicates a left-rear wheel brake pressure reduction performance fault detected by the ABS/ESC hydraulic control unit, meaning the system could not properly reduce brake pressure at that wheel during an ABS event. This is brake-safety related, so ABS and stability control may be disabled, though standard braking typically remains. On other makes the exact meaning may differ, so confirm against the vehicle's service data.
What are the most common causes of C1513?
The most common causes of C1513 are: Faulty ABS/ESC hydraulic control unit or solenoid valve, Left-rear wheel speed sensor or wiring fault, Air or contamination in the brake hydraulic circuit, Damaged connector or wiring at the HCU/EBCM, Failed ABS pump/motor, Low system voltage or poor ground. The specific cause varies by vehicle.
How much does it cost to fix C1513?
Repair costs for C1513 range from $150 to $2,500, depending on the vehicle and root cause.
Which vehicles are affected by C1513?
Au7o has documented C1513 across 3 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.