P0117 on Acura RDX
Factory diagnostic protocol and troubleshooting wire for fault code P0117 specifically for the Acura RDX (2020–2026, 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD)).
1. Symptoms of P0117 on Acura RDX
When the Engine Control Module (ECM/PCM) on your Acura RDX (2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD)) logs fault code P0117, drivers commonly observe:
2. Most Likely Causes on Acura RDX
Historical warranty claims and technical repair bulletins for Acura RDX point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Acura RDX
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 Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Unplug sensor connector while watching live data. If temperature drops to -40°F (-40°C), the sensor itself is shorted. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
If reading stays pegged at max with sensor unplugged, inspect harness for pinch points grounding against engine block. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
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 Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Bleed air from cooling system, clear DTCs, and verify normal temperature rise on live data. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Equipment for Diagnosing Acura RDX (P0117)
VVT Oil Control Solenoid Valve
Restores accurate camshaft timing and oil pressure regulation on Acura RDX.
AstroAI Auto-Ranging Digital Multimeter
Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.
BlueDriver Bluetooth Pro OBDII Scan Tool
Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.
Other Common Fault Codes on Acura RDX
Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Acura RDX:
4. Acura RDX P0117 FAQs
What causes code P0117 to trigger on a Acura RDX?
On the Acura RDX (2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD)), 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 Acura RDX?
On the Acura RDX, the 16-pin DLC diagnostic connector is located Under driver lower dash trim near hood release. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.
Can I safely drive my Acura RDX 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.