AutoCodes – Honda – P2184 2009 Honda Accord

P2184 2009 Honda Accord Code - Engine Coolant Temperature Sensor 2 Circuit Low

Quick Answer

Engine Coolant Temperature (ECT) sensor 2 is a thermistor attached to the radiator. Common causes include Low coolant level, Faulty Engine Coolant Temperature Sensor, Stuck or leaking thermostat. 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: P2184 2009 Honda Accord indicates Engine Coolant Temperature Sensor 2 Circuit Low.
Common causes: Common causes include Low coolant level, Faulty Engine Coolant Temperature Sensor, Stuck or leaking thermostat.
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 6,262

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
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2184 2009 Honda Accord Description

Engine Coolant Temperature (ECT) sensor 2 is a thermistor attached to the radiator. The Powertrain Control Module (PCM) applies voltage (about 5 V) to the ECT2 signal circuit through a pull up resistor. As the engine coolant temperature cools, ECT sensor 2 resistance increases, and the PCM detects a high signal voltage. As the engine coolant warms, the sensor resistance decreases, and the PCM detects a low ECT2 signal voltage. If the ECT sensor 2 output voltage is less than a set value when the engine coolant temperature is high, the PCM detects a malfunction and a DTC is stored.

OBDII Code P2184 2009 Honda Accord - Engine Coolant Temperature Sensor 2 Circuit Low - AutoCodes.com — P2184 2009 Honda Accord Code - Engine Coolant Temperature Sensor 2 Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2184 2009 Honda Accord?

Low coolant level
Faulty Engine Coolant Temperature Sensor
Stuck or leaking thermostat
Engine Coolant Temperature Sensor harness is open or shorted
Engine Coolant Temperature Sensor circuit poor electrical connection

How to Fix the DTC P2184 2009 Honda Accord?

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 P2184 2009 Honda Accord 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 P2184 2009 Honda Accord code?

Need more information on how to fix the P2184 2009 Honda Accord 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 P2184 2009 Honda Accord Code

1. What does the OBDII code P2184 mean on a 2009 Honda Accord?

P2184 indicates that the Engine Control Module (ECM) has detected a low voltage signal from Engine Coolant Temperature (ECT) Sensor 2, which monitors coolant temperature.

2. What are common symptoms of the P2184 code in a 2009 Honda Accord?

Symptoms may include the Check Engine Light turning on, poor fuel efficiency, engine overheating or running cooler than normal, and erratic temperature gauge readings.

3. What causes the P2184 code in a 2009 Honda Accord?

The common causes include a faulty ECT Sensor 2, wiring or connector issues (such as corrosion or damage), low coolant levels, or a malfunctioning ECM.

4. Can I drive my 2009 Honda Accord with a P2184 code?

Driving with this code is not recommended, as improper coolant temperature readings can lead to engine performance issues and potential overheating.

5. How do I diagnose the P2184 code on a 2009 Honda Accord?

Start by inspecting the ECT Sensor 2 and its wiring for damage or corrosion. Use a multimeter to test the sensorâ€™s resistance and check the voltage at the connector.

6. How do I fix the P2184 code on my 2009 Honda Accord?

Repairs may include replacing the ECT Sensor 2, repairing or replacing damaged wiring or connectors, topping off or flushing coolant, or, in rare cases, reprogramming or replacing the ECM.

7. Where is Engine Coolant Temperature Sensor 2 located on a 2009 Honda Accord?

ECT Sensor 2 is typically located near the thermostat housing or in the radiator outlet, but consult the vehicleâ€™s repair manual for exact placement.

8. How much does it cost to repair a P2184 code on a 2009 Honda Accord?

Replacing the ECT Sensor 2 can cost between $50 and $150, depending on labor rates and part prices. Wiring repairs may vary in cost based on the extent of damage.

9. Can a low coolant level trigger the P2184 code on a 2009 Honda Accord?

Yes, low coolant levels can cause incorrect readings from the ECT Sensor 2, potentially triggering the P2184 code.

10. Will clearing the P2184 code make it go away permanently?

Clearing the code without fixing the underlying issue will likely result in the code returning. Proper diagnosis and repair are necessary to resolve it.