DTC P0118 — Engine Coolant Temperature Sensor High Input
P0118 indicates: Engine Coolant Temperature Sensor High Input.
Diagnostic summary
P0118
What it means
Engine Coolant Temperature Sensor High Input
Can you drive?
⚠️ Drive with caution
Urgency
Medium 5/10
Typical price
$20 – $150
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Updated May 4, 2026 Seen on Powertrain
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ℹ️ What does it mean?
Engine Coolant Temperature Sensor High Input
🔍 Symptoms
- • Check Engine Light on
- • Reduced engine performance
- • Increased fuel consumption
- • Unusual engine behavior
⚠️ Possible Causes
- ⚠ Faulty ECT sensor
- ⚠ Open circuit
- ⚠ Disconnected connector
- ⚠ Corroded wiring
🚗 Can I drive with this code?
Drive with caution
Drive with caution. Schedule a repair soon.
🔧 How to Diagnose
- 1 Read DTCs with OBD-II scanner
- 2 Check freeze frame data
- 3 Inspect related components
- 4 Clear codes and test drive
🛠️ How to Fix
- 1 Replace ECT sensor
- 2 Repair wiring
- 3 Clean or replace connector
💰 Estimated Repair Cost
Repair cost by car / region
Early rough estimate. Accuracy improves as more real repair stories are added.
DIY / parts$7 – $98
Mechanic / labor$9 – $113
Repair range$20 – $150
❓ FAQ
What does P0118 mean?
Engine Coolant Temperature Sensor High Input
How serious is P0118?
Severity: medium. Drive with caution. Schedule a repair soon.
How much does it cost to fix P0118?
Estimated repair cost: $20–$150 depending on vehicle and region.
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