How much does it cost to fix P0118?

Typical repair cost is $80–$250.

P0118 — ECT Sensor High Voltage

Medium Severity · Cooling

OBD-II code P0118 means your vehicle's ECU detected: ECT Sensor High Voltage. Below: causes, step-by-step fixes, and repair cost — free, no signup needed.

Drivable short-term but schedule a diagnosis soon. Prolonged driving can worsen the issue.

Typical Repair Cost

$80–$250

Parts + labor, national average

Severity

Medium

Schedule repair soon

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Common Causes of P0118

Open circuit in ECT wiring
Failed sensor

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How to Fix Code P0118

Check ECT connector

Replace ECT sensor

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FAQ — Code P0118

What does OBD-II code P0118 mean?

P0118 means your vehicle's onboard computer detected: ECT Sensor High Voltage. This is a medium-severity code in the Cooling category.

How much does it cost to fix code P0118?

Typical repair cost for P0118 is $80–$250 including parts and labor. Costs vary by vehicle make, model, and location. A free scan at AutoZone or O'Reilly is a good first step.

Can I drive my car with code P0118?

Code P0118 is generally safe for short trips, but have it diagnosed soon to prevent the problem from worsening.

What are the most common causes of P0118?

The most common causes are: Open circuit in ECT wiring, Failed sensor. Always start with the cheapest diagnosis step before replacing parts.

Will code P0118 clear itself?

Code P0118 will clear itself after the underlying issue is fixed and the ECU completes several successful drive cycles. Clearing it without fixing the root cause only masks the problem temporarily.

Is P0118 showing on your car?

Enter your VIN for a free vehicle-specific report — recalls, specs, and market value. No signup required.

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OBD-II code data is based on SAE J2012 standards and general repair industry data. Repair costs are national averages and vary by vehicle, location, and shop. Always consult a qualified mechanic for a diagnosis specific to your vehicle.