P0120 on Acura RDX
Factory diagnostic protocol and troubleshooting wire for fault code P0120 specifically for the Acura RDX (2020–2026, 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD)).
1. Symptoms of P0120 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 P0120, 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
Connect an OBD-II scan tool and record freeze frame sensor telemetry for code P0120 to note engine RPM, load, and voltage when the fault triggered. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Inspect the electrical connector and wiring harness related to P0120 for chafing, corrosion, moisture, or pin push-out. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Measure circuit voltage supply (12V B+ or 5V reference) and sensor/actuator resistance according to factory repair manual specifications. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Install a new OEM-grade replacement part, torque fasteners to factory spec, and ensure electrical locking tabs click firmly. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Clear all stored DTCs from vehicle memory and perform an OBD-II drive cycle to confirm the diagnostic monitor resets to 'Ready'. on the Acura RDX equipped with 2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD).
Equipment for Diagnosing Acura RDX (P0120)
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 P0120 FAQs
What causes code P0120 to trigger on a Acura RDX?
On the Acura RDX (2.0L VTEC Turbo (272HP / 280 lb-ft / SH-AWD)), P0120 is most frequently caused by Faulty Throttle Position Sensor (TPS) or Worn throttle body gears.
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 P0120?
No. Throttle response may be disabled or locked in Limp Mode. Given that P0120 carries a Critical severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.