C05D3Driver Applied Pressure Higher Than Expected
- Generic OBD-II code · Chassis
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- The pressure the driver generates is higher than the measured pedal travel would predict, a hard pedal pattern. GM's integrated controller sets C05D3 when the measured simulator pressure is more than 20 bar above its travel-based model, outside fast applications, naming a closed or blocked simulator valve, a seized simulator and an in-range sensor fault. The booster-type EBCMs (XT4, 23OBDG07, 25OBDG03B) call the check hard pedal and react after 0.2 s without ABS or ESC activity; Type A with MIL. GM PIT6012/PIT6012A for 2023-2024 Colorado and Canyon pair C05D3 with P25A2, a lit check engine lamp and a soft pedal, and point first to a weak battery. Bosch maps the same hard-pedal zone over input rod stroke.
- What you may notice
- Check engine lamp on together with brake system message
- Brake pedal feels spongy, hard or unusual
- Likely causes
- LikelyWeak or discharged 12 V battery (GM PIT6012)
- PossiblePedal simulator valve closed or blocked
- PossiblePedal simulator piston seized
- RarePressure or travel sensor misreading within range
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.