POWERSTROKE-P0118 moderate Power Stroke ›

Engine Coolant Temperature Sensor Circuit High Input

The POWERSTROKE-P0118 (Power Stroke) diesel fault code means: Engine Coolant Temperature Sensor Circuit High Input. This is a moderate severity code.

My Garage →
Keep driving?
Yes, but fix soon
DIY difficulty
beginner
Estimated cost
$30-$80
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What Are the Symptoms of POWERSTROKE-P0118?

  • Hard start
  • No fan activation
  • CEL

What Causes POWERSTROKE-P0118? (Most Likely First)

  • Failed ECT sensor Very Likely
  • Open in signal wire Likely

Can I Still Drive with POWERSTROKE-P0118?

Yes, but fix soon. POWERSTROKE-P0118 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring it.

Frequently Asked Questions

What is P0118 on a 7.3L Power Stroke?

P0118 on a 7.3L Power Stroke (1994-2003) indicates: Engine Coolant Temperature Sensor Circuit High Input. This is a known diagnostic trouble code on this engine family and typically points to the causes listed above.

Can I drive with P0118 on my Power Stroke?

Yes, you can generally drive with this code, but diagnose it soon to prevent further damage.

How much does it cost to fix P0118?

Repair cost is typically $30-$80 depending on the underlying cause and whether you DIY or use a shop. Diagnostic time alone runs $100-$180 at most independent diesel shops.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose POWERSTROKE-P0118?

  1. Ohm out ECT sensor cold; replace if out of spec.

  2. Check harness integrity back to PCM.

Sources 1

This page is built from documented references. Verify against your own service info before repair work.

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0118 as a generic OBD-II code)

P0118 on Other Platforms

The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:

Gas / Automotive (OBD-II) Generic OBD-II definition for P0118 Duramax moderate Engine Coolant Temperature Sensor 1 Circuit High Kubota moderate Engine Coolant Temperature Sensor Circuit High Yanmar moderate Engine Coolant Temperature Sensor High

Which Vehicles Commonly Get POWERSTROKE-P0118?

  • 1994.5-1997 Ford F-250/F-350 7.3L Power Stroke
  • 1999-2003 Ford F-250/F-350 Super Duty 7.3L Power Stroke
  • 1999-2003 Ford F-450/F-550 Super Duty 7.3L Power Stroke
  • 1994.5-2003 Ford E-350/E-450 7.3L Power Stroke
  • 2000-2003 Ford Excursion 7.3L Power Stroke

Explore More

More Power Stroke codes → Diesel home All diesel codes Heavy-duty Guides

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