AutoCodes – BMW – P0669 BMW

P0669 BMW Code - DME Internal Fault Interior Temperature Sensor Signal

Quick Answer

The control solenoid (w/body and TCM) valve assembly has a built-in TCM temperature sensor to detect possible overtemperature conditions of the Transmission Control Module (TCM). Common causes include Obstructions in the airflow of the radiator or transmission cooler, Kinked or damaged transmission fluid lines, Damage to the transmission cooler. 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: P0669 BMW indicates DME Internal Fault Interior Temperature Sensor Signal.
Common causes: Common causes include Obstructions in the airflow of the radiator or transmission cooler, Kinked or damaged transmission fluid lines, Damage to the transmission cooler.
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 6,620

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 08, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0669 BMW Description

The control solenoid (w/body and TCM) valve assembly has a built-in TCM temperature sensor to detect possible overtemperature conditions of the Transmission Control Module (TCM). This fault indicates the TCM is in an overtemperature condition and the TCM has shut down to protect from possible heat damage to the TCM. TCM will remain off until the over temperature condition no longer exists.

OBDII Code P0669 BMW - DME Internal Fault Interior Temperature Sensor Signal - AutoCodes.com — P0669 BMW Code - DME Internal Fault Interior Temperature Sensor Signal

What does this mean?

What are the Possible Causes of the DTC P0669 BMW?

Obstructions in the airflow of the radiator or transmission cooler
Kinked or damaged transmission fluid lines
Damage to the transmission cooler

How to Fix the DTC P0669 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 does this mean?

Code Tech Notes

Replace DME as sensor is internal component

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0669 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 P0669 BMW code?

Need more information on how to fix the P0669 BMW 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 P0669 BMW Code

1. What does the OBDII code P0669 mean on a BMW?

P0669 indicates a DME (Digital Motor Electronics) internal fault related to the interior temperature sensor signal, meaning the sensor is not communicating correctly with the DME.

2. What are the symptoms of code P0669 on a BMW?

Symptoms may include erratic engine performance, unexpected cooling or heating behavior, a check engine light, and potential issues with climate control.

3. What causes the P0669 code on a BMW?

Common causes include a faulty interior temperature sensor, wiring or connection issues, or an internal failure within the DME itself.

4. Can I still drive my BMW with a P0669 code?

While the car may still be drivable, ignoring the code can lead to further complications, such as inefficient engine performance or climate control malfunctions.

5. How can I diagnose the P0669 code on a BMW?

Start by checking the wiring and connections of the interior temperature sensor, using a diagnostic scanner to confirm the fault, and testing the sensor's functionality.

6. How do you fix the P0669 code on a BMW?

Repairs may include replacing the interior temperature sensor, fixing damaged wiring, or reprogramming or replacing the DME if it has an internal failure.

7. Can a software update fix the P0669 code on a BMW?

In some cases, a DME software update from a BMW dealership may resolve the issue if it is caused by a software glitch.

8. What tools are needed to troubleshoot the P0669 code?

Youâ€™ll need an OBDII scanner, a multimeter for checking electrical continuity, and potentially BMW-specific diagnostic tools for in-depth DME analysis.

9. How much does it cost to fix a P0669 code on a BMW?

Costs can range from $100â€“$200 for sensor replacement to over $1,000 if the DME requires replacement or significant repairs.

10. Can a dirty or blocked sensor trigger the P0669 code on a BMW?

Yes, dirt, debris, or blockage around the interior temperature sensor can interfere with its signal and trigger the code. Cleaning the sensor may resolve the issue.