AutoCodes – BMW – P2185 BMW

P2185 BMW Code - Coolant Temperature Sensor At Radiator Outlet Signal 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 BMW indicates Coolant Temperature Sensor At Radiator Outlet Signal 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 18,350
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 11, 2020
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Code P2185 BMW 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 BMW - Coolant Temperature Sensor At Radiator Outlet Signal High - AutoCodes.com
P2185 BMW Code - Coolant Temperature Sensor At Radiator Outlet Signal High

What are the Possible Causes of the DTC P2185 BMW?

  • 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 BMW?

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 BMW 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 P2185 BMW code?

Need more information on how to fix the P2185 BMW code? Get Access to Factory Service Manuals

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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 BMW Code

1. What are the common symptoms of OBDII code P2185 in a BMW related to the Coolant Temperature Sensor at Radiator Outlet Signal High?

- Common symptoms may include the engine running hotter than normal, the temperature gauge reading incorrectly, and potential issues with the vehicle's fuel efficiency.

2. What are the possible causes of OBDII code P2185 in a BMW related to the Coolant Temperature Sensor at Radiator Outlet Signal High?

- The code P2185 can be triggered by a faulty coolant temperature sensor, a wiring issue, or a problem with the engine control module.

3. How can I diagnose the OBDII code P2185 in a BMW related to the Coolant Temperature Sensor at Radiator Outlet Signal High?

- Diagnosis typically involves using an OBDII scanner to read the code, testing the coolant temperature sensor for proper resistance values, and checking the wiring for any damage or loose connections.

4. Can I continue driving my BMW with OBDII code P2185 related to the Coolant Temperature Sensor at Radiator Outlet Signal High?

- It is not recommended to drive your BMW with this code present, as it can lead to potential overheating issues and engine damage. It's best to address the problem promptly.

5. How can I repair OBDII code P2185 in a BMW related to the Coolant Temperature Sensor at Radiator Outlet Signal High?

- Repair typically involves replacing the faulty coolant temperature sensor, fixing any wiring issues, and clearing the code with an OBDII scanner.

6. Are there any DIY tips for troubleshooting OBDII code P2185 in a BMW related to the Coolant Temperature Sensor at Radiator Outlet Signal High?

- DIY tips may include checking the coolant level, visually inspecting the sensor and its wiring for any obvious issues, and ensuring the engine is not overheating due to a separate problem.

7. How critical is it to address OBDII code P2185 in a BMW related to the Coolant Temperature Sensor at Radiator Outlet Signal High?

- It is important to address this code promptly to prevent potential engine damage from overheating and to ensure proper engine performance and fuel efficiency.

8. Can a faulty thermostat cause OBDII code P2185 related to the Coolant Temperature Sensor at Radiator Outlet Signal High in a BMW?

- Yes, a faulty thermostat can potentially cause incorrect temperature readings and trigger the P2185 code. It's a good idea to inspect and test the thermostat during diagnosis.

9. Will resetting the OBDII code P2185 related to the Coolant Temperature Sensor at Radiator Outlet Signal High in a BMW solve the problem?

- Resetting the code may temporarily clear the error, but if the underlying issue, such as a faulty sensor or wiring problem, is not addressed, the code is likely to reappear.

10. Is it advisable to take my BMW to a professional mechanic for OBDII code P2185 related to the Coolant Temperature Sensor at Radiator Outlet Signal High?

- It is recommended to take your BMW to a professional mechanic familiar with BMW diagnostics to accurately diagnose and repair the issue to ensure proper functioning of the vehicle.

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