Engine Coolant Temperature Sensor Circuit Low Input
The POWERSTROKE-P0117 (Power Stroke) diesel fault code means: Engine Coolant Temperature Sensor Circuit Low Input. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- beginner
- Estimated cost
- $30-$80
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Common Symptoms
- Hard cold start
- Black smoke
- CEL
Probable Causes (Ranked by Likelihood)
- Failed ECT sensor Very Likely
- Wiring short to ground Likely
Step-by-Step Diagnostic Procedure
Measure ECT resistance cold -- should be ~3-5k ohms at 70F.
Replace with Motorcraft sensor.
Frequently Asked Questions
What is P0117 on a 7.3L Power Stroke?
P0117 on a 7.3L Power Stroke (1994-2003) indicates: Engine Coolant Temperature Sensor Circuit Low Input. This is a known diagnostic trouble code on this engine family and typically points to the causes listed above.
Can I drive with P0117 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 P0117?
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.
P0117 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: