AutoCodesHonda – P2185 Honda

P2185 Honda Code - Engine Coolant Temperature Sensor 2 Circuit High Voltage

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
P2185 Honda indicates Engine Coolant Temperature Sensor 2 Circuit High Voltage.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 169,100
How popular is this code, among other codes? High
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P2185 Honda 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 P2185 Honda - Engine Coolant Temperature Sensor 2 Circuit High Voltage - AutoCodes.com
P2185 Honda Code - Engine Coolant Temperature Sensor 2 Circuit High Voltage

What are the Possible Causes of the DTC P2185 Honda?

  • 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 P2185 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2185 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.

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Information for Specific Honda Models

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 P2185 Honda Code

No Frequently Asked Questions about P2185 Honda Code found.

Discuss the causes and fixes for P2185 Honda OBDII Code

  • Mobil saya honda seilo 95 ECT nya rusak, apakah untuk sementara saya bisa ganti atau men-jumper dengan wertan/diode Klo bisa harus ukuran berapa um

  • buenas amigo, tengo un honda accord 95 automatico ex, me presenta los siguientes codigo sacados con un escaner, 06-2, 10-2,117-2 según la lista de codigos obd1 serían los siguientes, 6, 10,17, me podrian ayudar con los síntomas y la solución, ya que presentó irregularidad en la rpm y ya se le hizo limpieza del cuerpo de aceleracion y la valvula de minimo, aparte tengo la luz de drive (D) encendida con una luz verde y cuando pongo drive le cuesta arrancar y el velocimetro no me marca, agradeceria toda la ayuda que me puedan brindar, garcias

  • I just need help my 2013 honda civic i change both coolant sensor nut the harness there is no power i n
    eed help

  • What is the engine size in your Civic.

  • My engine temperature display always showing that the engine is cold. What might be wrong?

  • You probably need to replace the Engine Coolant Temperature Sensor. What model and year is your vehicle?

  • My Honda Accord shows solenods A circuit high
    And Engine Coolant Temperature Sensor 2 Circuit High Voltage
    ..
    Could it be the ECM?

  • Looks like you may have two different problems. What year is your Accord? what are all code you got?

  • please am using a honda 2003 eod model and my temperature always rises almost to the highest level within 1min once i start driving. what should i look out as my mechanic said my temperature sensor is ok.

  • If the sensor is OK, then the problem is that the engine is overheating.

    There are many things that could cause the engine to overheats, leaking coolant, bad water pump, clogged radiator, blown head gasket, etc.

    You should start by performing a coolant system service (Drain and refill coolant system)

  • Sir, am using Honda Accord 2007. My car is jerking anytime it trys to change gear, it makes noise as if it wants to jump. Pls what is the problem.

  • Unfortunately, there are many things that could cause the problem you describe. Do you have any other codes besides the P2185?

  • Replaced both sensors and thermostat on 2017 Civic hatch 1.5l turbo.Check engine comes automatically soon you start the engine.

  • Do you have any other codes, besides the P2185 code? any symptoms?

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