P0668 BMW - DME Internal Fault Interior Temperature Sensor Signal

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

P0668 BMW Possible Causes

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

How do I fix code P0668 BMW?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
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Tech Notes

Replace DME as sensor is internal component

Cost of diagnosing the P0668 BMW code

Labor: 1.0

The cost of diagnosing the P0668 BMW code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0668 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 P0668 Bmw - DME Internal Fault Interior Temperature Sensor Signal - AutoCodes.com

More Information

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