P0125 Honda 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 Honda 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.
Code P0125 Honda Description
What are the Possible Causes of the DTC P0125 Honda?
- 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 Honda?
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 Honda 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 Honda code?
Need more information on how to fix the P0125 Honda code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0125 Honda code diagnosed by a professional: Find a repair shop in your area
Information for Specific Honda Models
- P0125 2008 Honda Accord — Engine Coolant Temperature Sensor 1 Malfunction/Slow Response
- P0125 2009 Honda Accord — Engine Coolant Temperature Sensor 1 Malfunction/Slow Response
- P0125 2010 Honda Accord — Engine Coolant Temperature Sensor 1 Malfunction/Slow Response
- P0125 2016 Honda CR-V — Engine Coolant Temperature Sensor 1 Malfunction/Slow Response
- P0125 2017 Honda CR-V — Engine Coolant Temperature Sensor 1 Malfunction/Slow Response
- P0125 2018 Honda CR-V — Engine Coolant Temperature Sensor 1 Malfunction/Slow Response
- P0125 2019 Honda CR-V — Engine Coolant Temperature Sensor 1 Malfunction/Slow Response
- P0125 2020 Honda CR-V — Engine Coolant Temperature Sensor 1 Malfunction/Slow Response
- P0125 2021 Honda CR-V — Engine Coolant Temperature Sensor 1 Malfunction/Slow Response
Frequently Asked Questions about P0125 Honda Code
1. What are the common symptoms of OBDII code P0125 in a Honda?
- Common symptoms include the engine running too hot or too cold, poor fuel economy, rough idling, and possibly a check engine light.
2. What causes the OBDII code P0125 in a Honda?
- The most common cause is a faulty engine coolant temperature sensor, which may be malfunctioning or responding too slowly.
3. How can I diagnose the OBDII code P0125 in my Honda?
- You can diagnose the code by using an OBDII scanner to read the code, checking the engine coolant temperature sensor for proper operation, and inspecting the coolant levels.
4. Can a dirty engine coolant affect the OBDII code P0125 in a Honda?
- Yes, a dirty or contaminated engine coolant can affect the sensor's readings and trigger the P0125 code.
5. How can I repair the OBDII code P0125 in my Honda?
- The repair typically involves replacing the engine coolant temperature sensor to ensure proper functionality and accurate temperature readings.
6. Is it safe to continue driving with the OBDII code P0125 in a Honda?
- It is not recommended to ignore the code, as it can lead to potential engine damage or other issues. It's best to address the problem promptly.
7. Can a failing thermostat cause the OBDII code P0125 in a Honda?
- Yes, a failing thermostat can cause the engine coolant temperature sensor to malfunction or respond slowly, triggering the P0125 code.
8. How long does it take to repair the OBDII code P0125 in a Honda?
- Repairing the P0125 code by replacing the engine coolant temperature sensor typically takes around 1-2 hours, depending on the Honda model and accessibility of the sensor.
9. Will resetting the check engine light resolve the OBDII code P0125 in a Honda?
- Resetting the check engine light may temporarily clear the code, but if the underlying issue with the engine coolant temperature sensor is not fixed, the code is likely to reappear.
10. Can a DIY enthusiast repair the OBDII code P0125 in a Honda?
- Yes, replacing the engine coolant temperature sensor can be a DIY project for those with the necessary tools and experience working on cars.
Discuss the causes and fixes for P0125 Honda OBDII Code
Code P0125 Honda comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
