P267F: Control Module Internal Temperature Sensor A Circuit Intermittent/Erratic

Many control modules carry a temperature sensor on their own circuit board to protect output stages and, in transmission units, to back up fluid temperature. P267F adds an intermittent or erratic variant to the established family P0666 to P0669: the reading flickers, jumps or drops out briefly instead of being permanently too low, too high or implausible. Mercedes-Benz lists P267F00 as a temperature sensor fault of the control unit among the codes covered by its Intelligent Predictive Repair diagnosis for the 724.1 dual-clutch gearbox (bulletin LI27.00-P-077141, 2025), next to P0666 to P0669 and P0634. No thresholds are published. Since the sensor sits inside the module, repair usually means replacing or reprogramming that module.

Symptoms

• Check engine or transmission warning light
• Harsh or delayed shifts if the module uses substitute values
• Often no noticeable symptom

Most likely causes

• Internal defect of the control module or its temperature sensor
• Unstable module supply or ground causing erratic readings
• Module software misinterpreting the sensor signal

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the battery and grounds
2. Gently move the wiring with the engine running and watch whether the reading changes.
3. Clear the code and see if it returns
4. If it is a reference voltage code, disconnect sensors one at a time and see if the voltage recovers
5. Check whether a software update is available
6. Do not replace the control module without a full diagnosis

Good to know

• Repair difficulty: hard
• It can trigger limp mode.
• It affects emissions.

What each character of P267F means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 6: Control modules and outputs
• 7F: Specific fault in that system

Frequently asked questions

Can I keep driving with code P267F?

It depends on the symptoms. If the car is running normally you can go to a repair shop; if it goes into limp mode, drive as little as possible.

What causes code P267F?

The most common causes are: internal defect of the control module or its temperature sensor; unstable module supply or ground causing erratic readings; module software misinterpreting the sensor signal.

Related codes

• P0666Control Module Internal Temperature Sensor A Circuit
• P0667Control Module Internal Temperature Sensor A Range/Performance
• P0668Control Module Internal Temperature Sensor A Circuit Low
• P0669Control Module Internal Temperature Sensor A Circuit High
• P0634Control Module Internal Temperature A Too High

Sources

• static.nhtsa.gov: MC 11022045 0001
• saabwisonline.com: dtc p0667 p0668 or p0669
• law.cornell.edu: 13 CCR 1968.2

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.