P0118 on Dodge: Symptoms, Causes & DIY Fix
Official technical diagnostic wire for fault code P0118 (P0118: Engine Coolant Temperature (ECT) Circuit High Input) specifically affecting Dodge vehicles (Charger, Challenger, Durango, Hornet).
1. Symptoms of P0118 on Dodge
When the Engine Control Module (ECM/PCM) on your Dodge logs fault code P0118, drivers commonly observe:
2. Most Likely Causes on Dodge
Historical warranty claims and technical repair bulletins for Dodge point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Dodge
Interface with the diagnostic port or system console using verified scanning hardware. Record freeze-frame data, active sub-codes, and timestamps to isolate whether P0118 is static or intermittent. on Dodge vehicles (Charger, Challenger).
Visually inspect the physical component (ECT Sensor / Wiring Open Circuit), connector pins, and associated wiring harnesses for signs of corrosion, thermal melting, or loose grounding clips. on Dodge vehicles (Charger, Challenger).
Measure reference voltages and resistance thresholds against manufacturer factory specifications. Replace any component failing nominal impedance tolerances. on Dodge vehicles (Charger, Challenger).
Install genuine OEM replacement hardware or execute registry / service commands. Ensure all mounting bolts are torqued to factory specifications. on Dodge vehicles (Charger, Challenger).
Erase the fault code from non-volatile memory. Perform a standard verification cycle (e.g. 15-minute mixed drive or system stress benchmark) to ensure monitors reset to 'Ready' state without recurrent fault flags. on Dodge vehicles (Charger, Challenger).
P0118 Guides by Dodge Model
Select your specific Dodge model below for exact OBD-II DLC port locations, wiring diagrams, and engine displacement specs:
Other Common Diagnostic Codes on Dodge
Troubleshoot other high-frequency Check Engine Light fault codes reported across Dodge vehicles:
4. Dodge P0118 FAQs
What causes code P0118 to trigger on a Dodge?
On Dodge vehicles, P0118 is most frequently caused by Component aging, oxidation, or degraded internal circuit element (ECT Sensor / Wiring Open Circuit) or Wiring harness abrasion, loose terminal pin, or ground voltage float. Factory sensor degradation or wiring harness wear near the engine bay are common factors.
Can I safely drive my Dodge with code P0118?
Caution. Limited operation permitted only to reach a nearby repair facility or backup critical personal files. Given that P0118 carries a High severity rating on Dodge vehicles, we advise performing diagnostic scanning via the OBD-II port before extended driving.
How much does it cost to fix P0118 on a Dodge?
DIY replacement parts typically range between $120 - $280 (DIY: $25 - $50). If serviced at an authorized Dodge dealership, expect an additional $120–$250 in professional labor based on their $120/hr hourly rate.