AutoCodes – Audi – P2185 Audi

P2185 Audi Code - Engine Coolant Temperature Sensor 2 Circuit High

Quick Answer

This Diagnostic Trouble Code (DTC) is stored in the engine control module when the output from the Engine Coolant Temperature (ECT) Sensor is not as expected or missing. Common causes include Low coolant level, Faulty Engine Coolant Temperature (ECT) 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 Audi indicates Engine Coolant Temperature Sensor 2 Circuit High.
Common causes: Common causes include Low coolant level, Faulty Engine Coolant Temperature (ECT) 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 12,389

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 Jul 11, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2185 Audi Description

This Diagnostic Trouble Code (DTC) is stored in the engine control module when the output from the Engine Coolant Temperature (ECT) Sensor is not as expected or missing. The Engine Control Module (ECM) uses information from the Intake Air Temperature Sensor and Engine Oil Temperature Sensor to carry out a plausibility check on the signal. Engine Coolant Temperature Sensors are normally a negative temperature coefficient thermistor. The signal voltage drops as the engine coolant temperature increases. The signal from the sensor is used to adjust the ignition system rate of advance and fuel injection system duration for various operating conditions. A faulty Engine Coolant Temperature Sensor may result in an engine over fuelling or not entering closed-loop control. The rate of ignition advance is reduced when the engine is hot to reduce the possibility of engine knock occurring.

OBDII Code P2185 Audi - Engine Coolant Temperature Sensor 2 Circuit High - AutoCodes.com — P2185 Audi Code - Engine Coolant Temperature Sensor 2 Circuit High

What does this mean?

What are the Possible Causes of the DTC P2185 Audi?

Low coolant level
Faulty Engine Coolant Temperature (ECT) 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 Audi?

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 P2185 Audi 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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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 Audi Code

1. What are common symptoms of OBDII code P2185 in an Audi related to the Engine Coolant Temperature Sensor 2 Circuit High?

Symptoms may include the engine running hotter than normal, the temperature gauge reading incorrectly, and the Check Engine Light illuminating.

2. What are the possible causes of OBDII code P2185 in an Audi?

Potential causes include a faulty engine coolant temperature sensor, a wiring issue in the circuit, a malfunctioning thermostat, or a problem with the engine control module.

3. How can I diagnose the cause of OBDII code P2185 in my Audi?

You can use an OBDII scanner to read the code and further investigate by checking the coolant temperature sensor, inspecting the wiring for damage, testing the thermostat, and scanning for any other related codes.

4. Can I still drive my Audi with OBDII code P2185 present?

It is not recommended to drive your Audi with this code active, as it can lead to overheating and potential engine damage. It's best to address the issue promptly.

5. How do I repair OBDII code P2185 in my Audi?

The repair process typically involves replacing the faulty engine coolant temperature sensor, repairing any damaged wiring, testing and possibly replacing the thermostat, and clearing the code with an OBDII scanner.

6. Are there any DIY tips for fixing OBDII code P2185 in an Audi?

While some may attempt to replace the coolant temperature sensor themselves, it's recommended to have a professional diagnose and repair the issue to ensure proper functioning of the sensor and related components.

7. Is OBDII code P2185 related to emissions control systems in an Audi?

Yes, this code is related to the engine coolant temperature sensor, which plays a crucial role in the proper functioning of the emissions control system by helping maintain optimal engine temperature.

8. How much does it cost to repair OBDII code P2185 in an Audi?

The cost of repairs for this code can vary depending on the underlying issue, but it may range from $100 to $300 for parts and labor, excluding any additional components that may need attention.

9. Can OBDII code P2185 in an Audi cause other problems if left unaddressed?

If left unresolved, this code can lead to engine overheating, reduced fuel efficiency, and potentially more serious engine issues, so it's important to address it promptly.

10. How long does it take to repair OBDII code P2185 in an Audi?

The repair time can vary depending on the exact cause of the code and the availability of parts, but in general, it may take a few hours to a full day for a professional technician to diagnose and repair the issue.