Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P0116: Engine Coolant Temperature Sensor Range/Performance Problem
2003 Acura 3.2CL BaseSECTION DTC P0116: Engine Coolant Temperature Sensor Range/Performance Problem
WARNING: This page is about a different car, the 2003 Acura RSX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If DTC P0117 and/or P0118 are set, troubleshoot those DTCs before proceeding.
- Start engine and run at 3000 RPM, with no load (in park or neutral), until radiator cooling fan comes on. Allow engine to idle.
- Using scan tool, check Engine Coolant Temperature (ECT) sensor data. If ECT sensor reading is 176-212°F (80-100°C) or voltage is .5-.8 volt, problem is intermittent. System is okay at this time. Check thermostat and cooling system. If ECT sensor reading is not 176-212°F (80-100°C) or voltage is not .5-.8 volt, check thermostat and cooling system. If thermostat and cooling system is okay, replace ECT sensor.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.