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P0117 on Jeep Compass

Engine Coolant Temperature Sensor 1 Circuit Low

Factory diagnostic protocol and troubleshooting wire for fault code P0117 specifically for the Jeep Compass (2021–2026, 2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP)).

Verified OEM Telemetry & Field Repair Tree
Jeep Compass2021–2026
Jeep Compass
SUV2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP)
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
Compass 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 Jeep Model:
Diagnose P0117 on Specific Compass Model Year:

1. Symptoms of P0117 on Jeep Compass

When the Engine Control Module (ECM/PCM) on your Jeep Compass (2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP)) logs fault code P0117, drivers commonly observe:

Check Engine Light on on Jeep Compass (2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP))
Radiator radiator fans running constantly at high speed on Jeep Compass (2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP))
Temperature gauge pegged at maximum H or not reading on Jeep Compass (2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP))
Engine hard starting when cold (flooding from excess fuel) on Jeep Compass (2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP))
Poor gas mileage and rough idling on Jeep Compass (2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP))
Jeep Compass OBD-II Port Location
The 16-pin diagnostic connector is located Driver lower dash near hood lever assembly. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Jeep Compass

Historical warranty claims and technical repair bulletins for Jeep Compass point to the following failure distribution:

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

3. Step-by-Step DIY Repair Guide for Jeep Compass

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 Jeep Compass equipped with 2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP).

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 Jeep Compass equipped with 2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP).

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 Jeep Compass equipped with 2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP).

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 Jeep Compass equipped with 2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP).

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 Jeep Compass equipped with 2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP).

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

Equipment for Diagnosing Jeep Compass (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 Jeep Compass.

$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 Jeep CompassVerified direct-fit pricing from Denso, Bosch, Motorcraft, and ACDelco on Amazon.
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Other Common Fault Codes on Jeep Compass

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Jeep Compass:

4. Jeep Compass P0117 FAQs

What causes code P0117 to trigger on a Jeep Compass?

On the Jeep Compass (2.0L MultiAir Turbo 4-Cyl (177HP) / 1.3L Turbo 4xe PHEV (240HP)), 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 Jeep Compass?

On the Jeep Compass, the 16-pin DLC diagnostic connector is located Driver lower dash near hood lever assembly. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.

Can I safely drive my Jeep Compass 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.