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The Koeep SU14890 Crankshaft Position Sensor (CKP) feeds the ECM the one input it can't fake: real-time crankshaft rotational velocity and angular position. When that signal drifts or drops, you get stalling, long cranking, misfire counts, or a no-start. This reference covers what the SU14890 fits, what it replaces, and how to diagnose the failures it fixes on Hyundai-Kia Theta II and Lambda II engines.

Fitment: Four Platforms, Two Engine Families

The SU14890 is engineered for the Hyundai-Kia Theta II (G4KE/G4KG — 2.0L & 2.4L I4) and Lambda II (G6DB/G6DA/G6DH — 3.3L, 3.5L & 3.8L V6) engine families. Check your model and year against this range before ordering:

• Kia Sorento — 2009–2014 (2.4L Theta II)
• Kia Sedona — 2006–2014 (3.5L/3.8L Lambda)
• Hyundai Santa Fe — 2010–2018 (2.0L/2.4L Theta II & 3.3L Lambda II)
• Hyundai Azera — 2012–2017 (3.3L Lambda II)

Sensor failed? Order the SU14890 here — same three-wire layout, same 58X trigger pattern, no adapters, no calibration step.

OEM Part Numbers It Replaces

• 39180-3C600 · 39180-25300 · 39180-2B000 · 39180-2G000 · 39180-37150
• 39310-3C600 / 39310-3C601
• Aftermarket equivalents: 5S13482, PC996

SU14890 Specification Table

How It's Built: Hall Effect Architecture

Samarium-Cobalt Magnet, Not Neodymium

The Hall Effect IC is paired with a rare-earth samarium-cobalt (SmCo) permanent magnet. SmCo keeps its coercivity stable at sustained engine-bay temperatures above 130°C, where neodymium-iron-boron (NdFeB) alternatives lose margin. Curie temperature exceeds 700°C.

Glass-Fiber-Reinforced PPS Housing

The glass-fiber-reinforced PPS (polyphenylene sulfide) housing is a 2026-preferred under-hood material: it resists engine oil, coolant, and road salt spray, and holds its dimensions across the full –40°C to +150°C range. Qualification covers SAE J1455 §4.2 (Mechanical Shock), §4.3 (Thermal Shock), §4.5 (Humidity), and §4.7 (Chemical Exposure — engine oil, coolant, DOT 4 brake fluid, road salt).

ASIC With Dynamic Digital Compensation

The application-specific integrated circuit auto-corrects magnetic field drift caused by temperature change, holding tooth-to-tooth timing within ±0.5° crank angle. That precision matters for the Theta II's 10.5:1 compression ratio and the Lambda V6's continuously variable valve timing (CVVT) phasing. The ASIC is AEC-Q100 Grade 0 qualified for under-hood ambient temperatures.

Output and Sealing

The three-wire interface (VCC 5V reference, signal output, sensor ground) drives a 0–5V square wave with a clean falling-edge pulse every 6° of crank rotation on the 58X (60-2) trigger wheel. Mated to an OEM-spec sealed connector, ingress protection is IP67 — dust-tight, immersion to 1 m for 30 minutes. That seal blocks the moisture-driven signal corruption flagged as P0339 in humid climates. Output resolution supports SAE J1979 Mode $01 PID $0C (Engine RPM).

Diagnosing CKP Failures in 2026

The SU14890 directly resolves P0335, P0336, P0337, P0338, and P0339 in the ISO 15031-6 powertrain DTC namespace, plus P0322 (no engine speed input signal). It is correlation-critical for P0016/P0017 and underpins accurate misfire counting across P0300–P0306 — the ECM needs a stable crank reference to catch misfires on 2026 emission monitors.

P0335 — No Signal

Most often thermal degradation of the Hall Effect IC solder joints after 80,000+ miles. Verify 5V reference at Pin 1 (VCC) and continuity to ground at Pin 3 before condemning the sensor. An output stuck at 0V or 5V with no switching confirms internal ASIC failure — replace with the SU14890. On 2026 scan tools, monitor SAE J1979 Mode $06 Test ID $41 for CKP rationality thresholds.

P0336 — Erratic Signal

Usually an air gap over 1.5 mm between sensor tip and trigger wheel, caused by ferrous debris on the magnetic tip or housing warpage. On the Lambda 3.8L V6 (Kia Sedona), check for timing cover oil seepage on the reluctor ring. Lab-scope dropout events above 3,500 RPM confirm the fault. The SU14890's SmCo magnet holds gap tolerance better than NdFeB under thermal cycling.

P0339 — Intermittent Dropout

On the Santa Fe 2.4L (2010–2018) and Azera 3.3L (2012–2017), this traces to connector terminal fretting: microscopic oxidation between tin-plated terminals, driven by vibration harmonics at 1,800–2,200 RPM. Apply dielectric grease before seating the connector. If the code returns, check the harness for chafing near the front exhaust manifold heat shield — a known pinch point on Theta II transverse installs.

Hot Stall, No-Restart

Engine runs fine cold, stalls after 20–30 minutes, refuses to restart until it cools for 10–15 minutes. The Hall Effect IC enters thermal shutdown near 148°C — just 2°C below the rated maximum. Most common on the Kia Sorento 2.4L (2009–2014) in Southwest U.S. climates. The SU14890's 150°C-rated PPS housing and SmCo magnet give real headroom over baseline OEM sensors.

CKP-CMP Correlation Codes (P0016/P0017)

A failing CKP may never set a P0335–P0339 code; subtle timing drift instead triggers camshaft-crankshaft correlation faults. Before replacing VVT solenoids or the timing chain, scope CKP and CMP together. Tooth-tooth period varying more than 3% at steady RPM condemns the CKP. This is critical on the Lambda II 3.5L (Kia Sedona, Hyundai Azera) with its dual-CVVT phasing sensitivity.

Installation Notes

• Torque: 8–12 N·m (71–106 in·lb) on clean, dry threads — no threadlocker.
• Surface: a clean mounting surface and OEM-type connector seating protect the 100,000-mile nominal durability rating.
• Connector: dielectric grease on the pins; IP67 sealing applies only with the connector fully mated.
• Checks: 5V at Pin 1 (VCC), ground continuity at Pin 3, switching signal on the output pin.
• Post-install: clear codes, re-run Mode $06 Test ID $41, confirm steady RPM on Mode $01 PID $0C.

Terminal plating meets SAE/USCAR-2 performance Class 3 (100,000 mating-cycle equivalent), so repeated diagnosis sessions won't wear out the connection.

Related Parts Worth Checking While You're In There

A failing CKP can push fuel trims off long enough to stress emissions hardware. If your Sorento, Sedona, Santa Fe, or Azera also throws an oxygen-sensor code, the O2 Oxygen Sensor for Hyundai Santa Fe Genesis Azera Kia Sedona Sorento Upstream covers these same platforms.

For a direct-fit replacement unit, see the Oxygen O2 Sensor 234-4456 for Hyundai Azera Santa Fe Genesis Kia Sedona Sorento. Broader electrical faults — starter, alternator, ECU, or wiring — live in the Starters, Alternators & ECUs catalog.

Refreshing an earlier first-generation Sorento as well? The Complete Suspension Replacement Kit for 2003-2006 Kia Sorento: Front Struts & Rear Shocks Guide walks you through the struts and shocks.

Frequently Asked Questions