P0118High Priority
Engine Coolant Temperature Circuit High Input
Category: Powertrain• Fuel and Air Metering
6 articles · 3 makes affected
What is P0118?
Engine Coolant Temperature (ECT) Sensor Circuit High Input. The ECT sensor signal is abnormally high, showing extremely high temperatures or an open circuit.
Symptoms You May Notice
- ●Check engine light
- ●Hard starting when cold
- ●Poor cold weather performance
- ●Engine runs lean
How to Fix It
- ●Replace ECT sensor ($50-$150, beginner)
- ●Repair open circuit in wiring ($100-$300, intermediate)
- ●Check sensor connector ($30-$100, beginner)
Owner Statistics
Based on 127,234 real owner discussions • 4285 confirmed solutions
$1,730
Average Repair Cost
3%
Success Rate
21%
DIY Repairs
127,234
Data Sources
About This Data
Statistics are aggregated from real owner discussions on Reddit, automotive forums, and YouTube comments. All data is anonymized and represents actual repair experiences reported by vehicle owners.
Frequently Appears With
These codes often appear together in owner reports. Check these if you see P0118.
Based on analysis of 6 owner reports where multiple codes appeared together.
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