P0117 on RAM ProMaster
Factory diagnostic protocol and troubleshooting wire for fault code P0117 specifically for the RAM ProMaster (2020–2026, 3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP)).
1. Symptoms of P0117 on RAM ProMaster
When the Engine Control Module (ECM/PCM) on your RAM ProMaster (3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP)) logs fault code P0117, drivers commonly observe:
2. Most Likely Causes on RAM ProMaster
Historical warranty claims and technical repair bulletins for RAM ProMaster point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for RAM ProMaster
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 RAM ProMaster equipped with 3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP).
Unplug sensor connector while watching live data. If temperature drops to -40°F (-40°C), the sensor itself is shorted. on the RAM ProMaster equipped with 3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP).
If reading stays pegged at max with sensor unplugged, inspect harness for pinch points grounding against engine block. on the RAM ProMaster equipped with 3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP).
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 RAM ProMaster equipped with 3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP).
Bleed air from cooling system, clear DTCs, and verify normal temperature rise on live data. on the RAM ProMaster equipped with 3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP).
Equipment for Diagnosing RAM ProMaster (P0117)
VVT Oil Control Solenoid Valve
Restores accurate camshaft timing and oil pressure regulation on RAM ProMaster.
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 RAM ProMaster
Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the RAM ProMaster:
4. RAM ProMaster P0117 FAQs
What causes code P0117 to trigger on a RAM ProMaster?
On the RAM ProMaster (3.6L Pentastar V6 (280HP) / 3.0L EcoDiesel (174HP)), 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 RAM ProMaster?
On the RAM ProMaster, the 16-pin DLC diagnostic connector is located Driver side lower dash panel 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 RAM ProMaster 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.