AutoCodes – Honda – P0128 2016 Honda CR-V

P0128 2016 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 2016 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 3,184

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 09, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0128 2016 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 2016 Honda CR-V - Cooling System Malfunction - AutoCodes.com — P0128 2016 Honda CR-V Code - Cooling System Malfunction

What does this mean?

What are the Possible Causes of the DTC P0128 2016 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 2016 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 2016 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 2016 Honda CR-V code?

Need more information on how to fix the P0128 2016 Honda CR-V code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0128 2016 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 2016 Honda CR-V Code

1. What are the common symptoms of OBDII code P0128 in a 2016 Honda CR-V?

- Common symptoms include the engine running colder than normal, a noticeable decrease in fuel efficiency, and the Check Engine light illuminating on the dashboard.

2. What does the OBDII code P0128 indicate in a 2016 Honda CR-V?

- OBDII code P0128 in a 2016 Honda CR-V indicates a cooling system malfunction, specifically pointing towards a thermostat that is not operating correctly.

3. What are the possible causes of OBDII code P0128 in a 2016 Honda CR-V?

- The possible causes of OBDII code P0128 in a 2016 Honda CR-V include a faulty thermostat, a malfunctioning coolant temperature sensor, low coolant levels, or a problem with the cooling system's operation.

4. How can I diagnose the issue related to OBDII code P0128 in my 2016 Honda CR-V?

- To diagnose the issue, you can start by checking the coolant level, inspecting the thermostat for proper operation, testing the coolant temperature sensor, and ensuring there are no leaks in the cooling system.

5. Can I continue driving my 2016 Honda CR-V with OBDII code P0128?

- It is not recommended to continue driving your 2016 Honda CR-V with OBDII code P0128, as it can lead to potential engine damage due to improper engine temperature regulation.

6. How can I repair OBDII code P0128 in my 2016 Honda CR-V?

- Repairing OBDII code P0128 in your 2016 Honda CR-V typically involves replacing the thermostat, checking and possibly replacing the coolant temperature sensor, and ensuring the cooling system is functioning properly.

7. Will resetting the Check Engine light resolve OBDII code P0128 in my 2016 Honda CR-V?

- Resetting the Check Engine light will not resolve OBDII code P0128 in your 2016 Honda CR-V. It is essential to diagnose and address the underlying cooling system issue to prevent further problems.

8. How much does it cost to repair OBDII code P0128 in a 2016 Honda CR-V?

- The cost of repairing OBDII code P0128 in a 2016 Honda CR-V can vary depending on the specific repairs needed, but it typically involves replacing the thermostat and addressing any other related issues, which can range from $150 to $400.

9. Can a DIY enthusiast fix OBDII code P0128 in a 2016 Honda CR-V?

- A DIY enthusiast with the necessary tools and knowledge can potentially fix OBDII code P0128 in a 2016 Honda CR-V by replacing the thermostat and checking the cooling system components. However, if unsure, it's best to consult a professional mechanic.

10. How often does OBDII code P0128 occur in a 2016 Honda CR-V?

- OBDII code P0128 can occur in a 2016 Honda CR-V due to various factors, such as wear and tear on the thermostat or sensor, coolant leaks, or other cooling system issues. Regular maintenance can help prevent this code from appearing frequently.