AutoCodes – Honda – P0128 2017 Honda CR-V

P0128 2017 Honda CR-V Code - Cooling System Malfunction

Quick Answer

The thermostat is closed when the engine coolant temperature is low, and it stops the circulation of engine coolant to speed up engine warm-up. 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: P0128 2017 Honda CR-V indicates Cooling System Malfunction.
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.

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Code Popularity 355

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 Aug 03, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0128 2017 Honda CR-V Description

The thermostat is closed when the engine coolant temperature is low, and it stops the circulation of engine coolant to speed up engine warm-up. When the engine coolant temperature increases, the thermostat opens and circulates the engine coolant to control its temperature. When the engine coolant temperature decreases, the opening area of the thermostat is reduced to regulate the engine coolant temperature. If the thermostat sticks open, engine warm-up is delayed, and exhaust emissions are adversely affected. The Powertrain Control Module (PCM) measures the rise in the coolant temperature after the engine starts at the engine block and at the radiator, and it estimates the characteristics of the engine coolant temperature by calculations based on those two temperatures and the driving conditions. When the Engine Coolant Temperature (ECT) Sensor 2 immediately increases from the starting value, it is defined as the thermostat stuck open. When ECT Sensor 1 does not reach a specified value at a certain condition, it is defined as a thermostat malfunction.

OBDII Code P0128 2017 Honda CR-V - Cooling System Malfunction - AutoCodes.com — P0128 2017 Honda CR-V Code - Cooling System Malfunction

What does this mean?

What are the Possible Causes of the DTC P0128 2017 Honda CR-V?

Low engine coolant level
Leaking or stuck open thermostat
Faulty Engine Coolant Temperature (ECT) Sensor 1
Faulty Engine Coolant Temperature Sensor 2
Faulty Intake Air Temperature (IAT) Sensor
Faulty Manifold Absolute Pressure (MAP) Sensor
Faulty Crankshaft Position (CKP) Sensor
Faulty Barometric Pressure (BARO) Sensor
Faulty Radiator Fan

How to Fix the DTC P0128 2017 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 P0128 2017 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 P0128 2017 Honda CR-V code?

Need more information on how to fix the P0128 2017 Honda CR-V code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0128 2017 Honda CR-V code diagnosed by a professional: Find a repair shop in your area

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 P0128 2017 Honda CR-V Code

1. What does OBDII code P0128 on a 2017 Honda CR-V indicate?

- OBDII code P0128 on a 2017 Honda CR-V indicates a cooling system malfunction, specifically a low coolant temperature.

2. What are the common symptoms of a P0128 code on a 2017 Honda CR-V?

- Common symptoms of a P0128 code on a 2017 Honda CR-V include the engine running cooler than normal, poor fuel economy, and a check engine light.

3. What are the possible causes of a P0128 code on a 2017 Honda CR-V?

- Possible causes of a P0128 code on a 2017 Honda CR-V include a faulty thermostat, low coolant level, a malfunctioning coolant temperature sensor, or a problem with the cooling system.

4. How can I diagnose a P0128 code on my 2017 Honda CR-V?

- To diagnose a P0128 code on a 2017 Honda CR-V, you can start by checking the coolant level, inspecting the thermostat, testing the coolant temperature sensor, and ensuring the cooling system is functioning properly.

5. Can I continue driving my 2017 Honda CR-V with a P0128 code?

- It is not recommended to drive your 2017 Honda CR-V with a P0128 code for an extended period as it can lead to poor engine performance and potential overheating issues.

6. How can I repair a P0128 code on my 2017 Honda CR-V?

- Repairing a P0128 code on a 2017 Honda CR-V typically involves replacing the thermostat, topping up the coolant level, checking and replacing the coolant temperature sensor if necessary, and ensuring the cooling system is working correctly.

7. Will resetting the check engine light fix a P0128 code on a 2017 Honda CR-V?

- Simply resetting the check engine light will not fix a P0128 code on a 2017 Honda CR-V. The underlying issue causing the code needs to be diagnosed and repaired to prevent further problems.

8. How much does it cost to repair a P0128 code on a 2017 Honda CR-V?

- The cost to repair a P0128 code on a 2017 Honda CR-V can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Can a DIY enthusiast fix a P0128 code on a 2017 Honda CR-V?

- Depending on your skill level and experience, a DIY enthusiast may be able to fix a P0128 code on a 2017 Honda CR-V by following proper diagnostic procedures and replacing any faulty components.

10. How often does a P0128 code occur in a 2017 Honda CR-V?

- A P0128 code is not a common occurrence in a 2017 Honda CR-V, but it can happen due to issues with the cooling system components or sensors. Regular maintenance can help prevent such codes from appearing.