AutoCodes – Dodge – P0125 Dodge

P0125 Dodge Code - Insufficient Coolant Temperature for Closed Loop Fuel Control

Quick Answer

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. Common causes include Low engine coolant level, Leaking or stuck open thermostat, Faulty Engine Coolant Temperature (ECT) sensor. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0125 Dodge indicates Insufficient Coolant Temperature for Closed Loop Fuel Control.
Common causes: Common causes include Low engine coolant level, Leaking or stuck open thermostat, Faulty Engine Coolant Temperature (ECT) sensor.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 15,657

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0125 Dodge Description

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.

OBDII Code P0125 Dodge - Insufficient Coolant Temperature for Closed Loop Fuel Control - AutoCodes.com — P0125 Dodge Code - Insufficient Coolant Temperature for Closed Loop Fuel Control

What does this mean?

What are the Possible Causes of the DTC P0125 Dodge?

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 DTC P0125 Dodge?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0125 Dodge code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0125 Dodge code?

Need more information on how to fix the P0125 Dodge code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0125 Dodge Code

1. What are the common symptoms of OBDII code P0125 in a Dodge vehicle?

- Common symptoms include the check engine light turning on, engine running hotter than normal, poor fuel economy, and potential overheating issues.

2. What are the possible causes of the OBDII code P0125 in a Dodge vehicle?

- The code P0125 usually indicates insufficient coolant temperature for closed-loop fuel control. Possible causes include a faulty thermostat, low coolant level, a malfunctioning coolant temperature sensor, or a stuck open cooling system thermostat.

3. How can I diagnose the OBDII code P0125 on my Dodge?

- Diagnose the code by checking the coolant level, inspecting the thermostat for proper operation, testing the coolant temperature sensor, and ensuring the cooling system is functioning correctly.

4. Can a faulty thermostat cause the OBDII code P0125 in a Dodge?

- Yes, a faulty thermostat that is stuck open can cause the engine to run cooler than normal, triggering the P0125 code.

5. Is it safe to continue driving with the OBDII code P0125 illuminated in my Dodge?

- It is not recommended to continue driving with the P0125 code as it can lead to potential engine overheating and other serious issues. It is best to address the problem promptly.

6. How can I repair the OBDII code P0125 in my Dodge?

- Repair options may include replacing the thermostat, topping up coolant levels, checking and replacing the coolant temperature sensor if necessary, and ensuring proper cooling system operation.

7. Will resetting the check engine light resolve the OBDII code P0125 in a Dodge?

- Resetting the check engine light may temporarily turn it off, but if the underlying issue causing the P0125 code is not addressed, the light will likely come back on.

8. Can a low coolant level trigger the OBDII code P0125 in a Dodge?

- Yes, a low coolant level can lead to insufficient coolant temperature, triggering the P0125 code. It is important to check and top up coolant levels as part of the diagnosis.

9. How important is it to fix the OBDII code P0125 in a Dodge?

- It is crucial to address the P0125 code promptly to prevent potential engine damage, overheating, and to ensure proper fuel control for optimal performance and fuel efficiency.

10. Can a DIY enthusiast repair the OBDII code P0125 issue in a Dodge?

- Depending on the underlying cause, some DIY enthusiasts may be able to address the P0125 code by replacing the thermostat, checking coolant levels, and inspecting the coolant temperature sensor. However, more complex issues may require professional assistance.