POWERSTROKE-P0125 moderate Power Stroke ›

Insufficient Coolant Temperature for Closed Loop Fuel Control

The POWERSTROKE-P0125 (Power Stroke) diesel fault code means: Insufficient Coolant Temperature for Closed Loop Fuel Control. This is a moderate severity code.

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Keep driving?
Yes, but fix soon
DIY difficulty
intermediate
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What Are the Symptoms of POWERSTROKE-P0125?

  • Check Engine Light on
  • Temperature gauge slow to rise
  • Heater slow to warm up

What Causes POWERSTROKE-P0125? (Most Likely First)

  • Thermostat stuck open or opening early High
  • Coolant temperature sensor reading low Moderate
  • Low coolant level Moderate
  • Long idling in cold weather Low

Can I Still Drive with POWERSTROKE-P0125?

Yes, but fix soon. POWERSTROKE-P0125 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 does P0125 mean on a Power Stroke?

P0125 means Insufficient Coolant Temperature for Closed Loop Fuel Control. The engine is taking longer than expected to reach the temperature the engine computer needs for normal fuel control.

Is P0125 a Power Stroke-specific code?

No. P0125 is a generic OBD-II code defined by SAE J2012, so it means the same thing on any vehicle that sets it. The exact conditions Ford uses to set it on its diesels are in Ford service information.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose POWERSTROKE-P0125?

  1. Check the coolant level.

  2. Compare the coolant temperature reading with a known-good thermometer.

  3. Check the warm-up time and the thermostat.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0125 as a generic OBD-II code)

P0125 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 P0125

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