C0616Park Brake Control Module Control Circuit Performance
- Generic OBD-II code · Chassis
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- C0616 is the one code in this range that GM really uses. Its 2025 EBCM tables file over twenty parking brake self-tests under it, all Type C without MIL: the left and right H-bridge supplies may not differ by more than 12 % at 8–20 V, the current measuring path must read 10.5–17 A in its self-test, the motor voltage must stay between 7 and 18 V for 700 ms, plus watchdog, ASIC and rollaway checks. The 2019 tables for the L3B engine list C0616 for an ADC reference fault in the EBCM as Type A with MIL. Bulletin 24-NA-122 traces a parking brake warning on 2024 Silverado and Sierra HD trucks to EBCM software; the fix is reprogramming, not a new module. Mitsubishi reports similar faults as C10B3.
- What you may notice
- Service Parking Brake message in the driver information center
- Parking brake warning lamp; parking brake may be inhibited
- Check engine lamp on some GM models
- Likely causes
- LikelySoftware anomaly in the brake module (GM 2024 HD trucks, fixed by reprogramming)
- PossibleWeak battery, poor ground or charging fault pushing motor voltage outside its window
- PossibleInternal hardware fault in the parking brake ASIC, bridge or measuring path
- RareParking brake assembly check not completed after module replacement
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.