P0117 on Honda Pilot
Factory diagnostic protocol and troubleshooting wire for fault code P0117 specifically for the Honda Pilot (2021–2026, 3.5L DOHC 24-Valve V6 (285HP / 10-Speed Auto)).
1. Symptoms of P0117 on Honda Pilot
When the Engine Control Module (ECM/PCM) on your Honda Pilot (3.5L DOHC 24-Valve V6 (285HP / 10-Speed Auto)) logs fault code P0117, drivers commonly observe:
2. Most Likely Causes on Honda Pilot
Historical warranty claims and technical repair bulletins for Honda Pilot point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Honda Pilot
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 Honda Pilot equipped with 3.5L DOHC 24-Valve V6 (285HP / 10-Speed Auto).
Unplug sensor connector while watching live data. If temperature drops to -40°F (-40°C), the sensor itself is shorted. on the Honda Pilot equipped with 3.5L DOHC 24-Valve V6 (285HP / 10-Speed Auto).
If reading stays pegged at max with sensor unplugged, inspect harness for pinch points grounding against engine block. on the Honda Pilot equipped with 3.5L DOHC 24-Valve V6 (285HP / 10-Speed Auto).
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 Honda Pilot equipped with 3.5L DOHC 24-Valve V6 (285HP / 10-Speed Auto).
Bleed air from cooling system, clear DTCs, and verify normal temperature rise on live data. on the Honda Pilot equipped with 3.5L DOHC 24-Valve V6 (285HP / 10-Speed Auto).
Equipment for Diagnosing Honda Pilot (P0117)
VVT Oil Control Solenoid Valve
Restores accurate camshaft timing and oil pressure regulation on Honda Pilot.
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 Honda Pilot
Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Honda Pilot:
4. Honda Pilot P0117 FAQs
What causes code P0117 to trigger on a Honda Pilot?
On the Honda Pilot (3.5L DOHC 24-Valve V6 (285HP / 10-Speed Auto)), 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 Honda Pilot?
On the Honda Pilot, the 16-pin DLC diagnostic connector is located Under driver steering column. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.
Can I safely drive my Honda Pilot 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.