Powertrain, generic (extended)

P267F Control Module Internal Temperature Sensor A Circuit Intermittent/Erratic

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

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

Symptoms

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

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,500
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

control modulecontrol module internal temperature sensor

Related codes

P0666P0667P0668P0669P0634

References: static.nhtsa.gov, saabwisonline.com, law.cornell.edu.