Electronic Parking Brake Auto-Apply Malfunction
What does C0272 mean?
The C0272 code means the vehicle's onboard diagnostic system has detected: Electronic Parking Brake Auto-Apply Malfunction. This is a moderate severity code.
Common Symptoms
- Parking brake warning light on
- Auto-apply feature not working when vehicle is shifted to park
- Parking brake does not engage automatically when engine is off
- Hill hold function inoperative
- Error message related to parking brake auto-apply
Probable Causes (Ranked by Likelihood)
- Auto-apply feature disabled by a related fault Very High
- Gear selector position sensor signal issue High
- Parking brake module software fault Moderate
- Brake pedal position sensor not providing correct signal Moderate
- Inclination sensor failure affecting hill hold Low
Step-by-Step Diagnostic Procedure
-
Scan for all DTCs -- auto-apply faults are often secondary to other issues
-
Check gear selector position sensor operation in live data
-
Verify brake pedal position sensor readings
-
Check if the auto-apply feature was accidentally disabled in vehicle settings
-
Look for companion codes in the parking brake and ABS modules
Frequently Asked Questions
What is the parking brake auto-apply feature?
Auto-apply is a convenience feature that automatically engages the electronic parking brake when the vehicle is shifted to park or the engine is turned off. It prevents the vehicle from rolling without the driver manually pressing the parking brake button.
Can I turn auto-apply on or off?
On most vehicles, yes. Check your vehicle settings menu or owner's manual. Some vehicles have a toggle in the infotainment system or require holding the parking brake button to change the setting.
Is C0272 a serious problem?
It is moderate. The parking brake itself may still function manually. The auto-apply convenience feature is disabled, which means you must remember to manually engage the parking brake. Fix the underlying cause to restore the feature.