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P0117KiaKia K5 HubAll Kia P0117High Severity

P0117 on Kia K5

Engine Coolant Temperature Sensor 1 Circuit Low

Factory diagnostic protocol and troubleshooting wire for fault code P0117 specifically for the Kia K5 (2021–2026, 2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP)).

Verified OEM Telemetry & Field Repair Tree
Kia K52021–2026
Kia K5
Sedan2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP)
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
K5 SAE Mode $01
ECU Network Bus
500 kbps CAN-FD
ISO 15765-4 Compliant
Drivability Status
Not Recommended
High urgency level
Est. Repair Cost
$80 - $250 (DIY: $20 - $60)
Parts & Labor DIY
Check P0117 On Another Kia Model:
Diagnose P0117 on Specific K5 Model Year:

1. Symptoms of P0117 on Kia K5

When the Engine Control Module (ECM/PCM) on your Kia K5 (2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP)) logs fault code P0117, drivers commonly observe:

Check Engine Light on on Kia K5 (2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP))
Radiator radiator fans running constantly at high speed on Kia K5 (2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP))
Temperature gauge pegged at maximum H or not reading on Kia K5 (2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP))
Engine hard starting when cold (flooding from excess fuel) on Kia K5 (2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP))
Poor gas mileage and rough idling on Kia K5 (2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP))
Kia K5 OBD-II Port Location
The 16-pin diagnostic connector is located Driver lower dash left of center stack. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Kia K5

Historical warranty claims and technical repair bulletins for Kia K5 point to the following failure distribution:

55%
ECT sensor internal short to ground (Kia OEM Part)
25%
Short circuit to ground in ECT signal wiring harness (Kia OEM Part)
12%
Damaged, corroded, or water-contaminated ECT connector (Kia OEM Part)
8%
Faulty PCM / ECM analog input circuit (Kia OEM Part)
* Source: Synthesized from NHTSA ODI field repair telemetry and verified OEM Technical Service Bulletin (TSB) repair tree frequency percentiles for Kia K5.

3. Step-by-Step DIY Repair Guide for Kia K5

01
Scan ECT Temperature Data

Read ECT live PID on scanner. If it reads 284°F (140°C) or higher with engine cold, a short to ground exists. on the Kia K5 equipped with 2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP).

Required Tool: OBD-II Scanner
02
Unplug ECT Sensor Connector

Unplug sensor connector while watching live data. If temperature drops to -40°F (-40°C), the sensor itself is shorted. on the Kia K5 equipped with 2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP).

Required Tool: OBD-II Scanner
03
Inspect Wiring Harness

If reading stays pegged at max with sensor unplugged, inspect harness for pinch points grounding against engine block. on the Kia K5 equipped with 2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP).

Required Tool: Digital Multimeter
04
Replace Engine Coolant Temperature Sensor

Allow engine to cool, unscrew old ECT sensor from coolant crossover pipe or thermostat housing, install new OEM sensor with fresh thread sealant. on the Kia K5 equipped with 2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP).

Required Tool: 19mm Deep Socket, Ratchet, Coolant Catch Pan
05
Top off Coolant & Clear Codes

Bleed air from cooling system, clear DTCs, and verify normal temperature rise on live data. on the Kia K5 equipped with 2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP).

Required Tool: Coolant Funnel Kit, OBD-II Scanner
Recommended Parts & Testing Tools

Equipment for Diagnosing Kia K5 (P0117)

Prime Fast Delivery & Verified Fitment
Variable Valve Timing (VVT)

VVT Oil Control Solenoid Valve

4.6 / 5.0 (Direct Fit)

Restores accurate camshaft timing and oil pressure regulation on Kia K5.

$34 – $65 Prime
Check Fitment on Amazon
Sensor Signal Voltage Meter

AstroAI Auto-Ranging Digital Multimeter

4.6 / 5.0 (Best Seller)

Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.

$29.99 Prime
View on Amazon
Top Mobile OBD-II Scanner

BlueDriver Bluetooth Pro OBDII Scan Tool

4.7 / 5.0 (50,000+ Reviews)

Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.

Compare OEM & Aftermarket Replacement Sensors for Kia K5Verified direct-fit pricing from Denso, Bosch, Motorcraft, and ACDelco on Amazon.
Find Parts on Amazon
* As an Amazon Associate, MazicBay earns from qualifying purchases. Prices & availability subject to change.

Other Common Fault Codes on Kia K5

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Kia K5:

4. Kia K5 P0117 FAQs

What causes code P0117 to trigger on a Kia K5?

On the Kia K5 (2.5L 4-Cyl (191HP) / 2.5L Turbo GT (290HP) / 1.6L Turbo (180HP)), P0117 is most frequently caused by ECT sensor internal short to ground or Short circuit to ground in ECT signal wiring harness.

Where is the OBD-II port located on my Kia K5?

On the Kia K5, the 16-pin DLC diagnostic connector is located Driver lower dash left of center stack. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.

Can I safely drive my Kia K5 with code P0117?

No. The ECU thinks the engine is at 280°F+ (overheating) and runs rich or disables cooling fan logic. Given that P0117 carries a High severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.