AutoCodes – Honda – P0125 2021 Honda CR-V

P0125 2021 Honda CR-V Code - Engine Coolant Temperature Sensor 1 Malfunction/Slow Response

Quick Answer

The Powertrain Control Module (PCM) supplies voltage to the engine coolant temperature signal circuit (about 5 V) through a pull-up resistor. Common causes include Low engine coolant level, Leaking or stuck open thermostat, Faulty Engine Coolant Temperature (ECT) Sensor 1. 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 2021 Honda CR-V indicates Engine Coolant Temperature Sensor 1 Malfunction/Slow Response.
Common causes
Common causes include Low engine coolant level, Leaking or stuck open thermostat, Faulty Engine Coolant Temperature (ECT) Sensor 1.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 210
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 03, 2023
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Code P0125 2021 Honda CR-V Description

The Powertrain Control Module (PCM) supplies voltage to the engine coolant temperature signal circuit (about 5 V) through a pull-up resistor. As the engine coolant cools, the Engine Coolant Temperature (ECT) Sensor 1 resistance increases and the PCM detects a high signal voltage. As the engine coolant warms, the ECT Sensor 1 resistance decreases, and the PCM detects a low signal voltage. If the ECT Sensor 1 output voltage does not reach a specified temperature at which closed-loop control for stoichiometric air/fuel ratio starts within a set time, depending on the initial engine coolant temperature after starting the engine, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).
OBDII Code P0125 2021 Honda CR-V - Engine Coolant Temperature Sensor 1 Malfunction/Slow Response - AutoCodes.com
P0125 2021 Honda CR-V Code - Engine Coolant Temperature Sensor 1 Malfunction/Slow Response

What are the Possible Causes of the DTC P0125 2021 Honda CR-V?

  • Low engine coolant level
  • Leaking or stuck open thermostat
  • Faulty Engine Coolant Temperature (ECT) Sensor 1
  • Engine Coolant Temperature Sensor 1 harness is open or shorted
  • Engine Coolant Temperature Sensor 1 electrical circuit poor connection

How to Fix the DTC P0125 2021 Honda CR-V?

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 2021 Honda CR-V 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 2021 Honda CR-V code?

Need more information on how to fix the P0125 2021 Honda CR-V 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 2021 Honda CR-V Code

1. What are the common symptoms of OBDII code P0125 on a 2021 Honda CR-V?

The common symptoms of code P0125 on a 2021 Honda CR-V include the check engine light turning on, engine running colder or hotter than normal, and decreased fuel efficiency.

2. What are the possible causes of the OBDII code P0125 on a 2021 Honda CR-V?

The possible causes of code P0125 on a 2021 Honda CR-V are a faulty engine coolant temperature sensor, issues with the cooling system, a malfunctioning thermostat, or a problem with the wiring or connectors related to the sensor.

3. How can I diagnose the Engine Coolant Temperature Sensor 1 Malfunction/Slow Response code on my 2021 Honda CR-V?

To diagnose code P0125 on a 2021 Honda CR-V, you can use an OBDII scanner to retrieve the specific fault code, visually inspect the engine coolant temperature sensor and its wiring, and test the sensor's resistance and voltage.

4. Can a faulty engine coolant temperature sensor cause other issues besides triggering the P0125 code on a 2021 Honda CR-V?

Yes, a faulty engine coolant temperature sensor on a 2021 Honda CR-V can cause other issues such as poor engine performance, inaccurate temperature readings, and potential overheating problems.

5. What are some repair tips for addressing the Engine Coolant Temperature Sensor 1 Malfunction/Slow Response code on a 2021 Honda CR-V?

Some repair tips for dealing with code P0125 on a 2021 Honda CR-V include checking and replacing the engine coolant temperature sensor, ensuring proper coolant levels and system function, and verifying the thermostat's operation.

6. Is it safe to continue driving my 2021 Honda CR-V with OBDII code P0125 active?

It is generally not recommended to continue driving your 2021 Honda CR-V with code P0125 active, as the issue could lead to potential engine damage or other related problems if left unaddressed.

7. How much does it typically cost to repair the Engine Coolant Temperature Sensor 1 Malfunction/Slow Response code on a 2021 Honda CR-V?

The cost of repairing code P0125 on a 2021 Honda CR-V can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor, excluding any additional repairs that may be needed.

8. Can I reset the OBDII code P0125 on my 2021 Honda CR-V without fixing the underlying issue?

While you can reset the check engine light and clear the P0125 code on a 2021 Honda CR-V temporarily, the issue will likely reoccur if the underlying problem with the engine coolant temperature sensor is not addressed.

9. How long does it typically take to repair the Engine Coolant Temperature Sensor 1 Malfunction/Slow Response code on a 2021 Honda CR-V?

The repair time for code P0125 on a 2021 Honda CR-V can vary depending on the extent of the issue and the availability of parts, but it may take anywhere from 1 to 3 hours to complete the repair.

10. Are there any recalls or technical service bulletins related to the OBDII code P0125 on a 2021 Honda CR-V?

It is recommended to check with a Honda dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or technical service bulletins related to code P0125 on a 2021 Honda CR-V.

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