C053EBrake Pressure Sensor A Circuit Low
- Generic OBD-II code · Chassis
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- The voltage on the signal line of brake pressure sensor A has dropped under the lower limit the brake module accepts. Such ratiometric 5-V sensors normally stay within a window: an older Saab 9-5 brake unit faults its pressure sensor below 0.25 V held for 0.1 s. Usual triggers are a signal wire shorted to ground, a lost 5-V feed or a sensor failing internally. GM shows a second pattern: on 2024 Silverado/Sierra 2500HD/3500HD, C053E with a MIL message at start-up came from the sensor still initializing and warming up; bulletin 24-NA-016 prescribes new EBCM software and warns against replacing the modulator valve. Mitsubishi lists C106C-16 as this code (Outlander PHEV 2023). Unlike C053F the reading is too low; unlike C053D it is electrically out of range.
- What you may notice
- ABS or stability control warning lamp lit
- Message in the driver display right after start-up
- Stability, traction control or brake assist switched off
- Likely causes
- LikelySignal wire chafed through and touching ground
- PossibleMissing or weak 5-V reference to the sensor
- PossibleModule software flagging the sensor during start-up warm-up (GM HD trucks 2024)
- RarePressure sensor failed internally
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.