DTC C1247/47 Stroke Sensor Malfunction: Description

WARNING: This page is about a different car, the 2009 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

Detects a problem with booster vacuum pressure and enters assist control.

DTC DETECTION CONDITION CHART

DTC Code	DTC Detection Condition	Trouble Area
C1247/47	When either condition below is met: When the output becomes 4.7 V or more or 0.2 V or less per 0.1 seconds. When the output does not return to 2.5 V even when 0.5 seconds or more elapse, in spite of no change in brake operation.	Brake booster Pedal stroke sensor Pedal stroke sensor circuit VSC actuator (skid control ECU)