Engine-Codes - Ford - P0125 2003 FORD F150

P0125 2003 FORD F150 Code - Insufficient Coolant Temperature for Closed Loop Fuel Control

- Code Popularity: 18,067 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
Table of contents

|What are the Possible Causes of the P0125 2003 FORD F150 Code?

  • Low engine coolant level
  • Leaking or stuck open thermostat
  • Faulty Engine Coolant Temperature (ECT) sensor
  • Engine Coolant Temperature (ECT) sensor harness is open or shorted
  • Engine Coolant Temperature (ECT) sensor electrical circuit poor connection

|How to Fix the P0125 2003 FORD F150 Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|P0125 2003 FORD F150 code tech notes

Compare thermostat specification to actual engine coolant temperature using the engine temperature PID (ECT or CHT). Temperature reading should be similar when engine is at normal operating temperature.

|What is the cost to diagnose the P0125 2003 FORD F150 code?

Labor: 1.0

The cost to diagnose the P0125 2003 FORD F150 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0125 2003 FORD F150 code detected?

The voltage sent to Engine Control Module (ECM) from the Engine Coolant Temperature (ECT) sensor is not practical, even when some time has passed after starting the engine. The engine is taking too long to reach the normal temperature level.

|What are P0125 2003 FORD F150 code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the P0125 2003 FORD F150 Code Mean?

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

Insufficient Coolant Temperature for Closed Loop Fuel Control

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