C0161 on GMC
ABS/TCS Brake Pressure Sensor Circuit
C0161 on GMC vehicles indicates abs/tcs brake pressure sensor circuit. Au7o has documented this code across 1 GMC model — most commonly on Hummer EV. This chassis code refers to a fault in the brake pressure sensor circuit used by the ABS and traction control system (TCS). That sensor reports hydraulic pressure in the brake system so the module knows how hard the driver is braking and can modulate ABS and traction/stability events accurately. The code sets when the sensor signal is missing, out of range, or the circuit is open/shorted. Normal braking usually continues to work, but ABS, traction, and stability functions may be disabled with warning lights illuminated.
Common Causes of C0161
- •Faulty brake pressure sensor
- •Open, shorted, or corroded sensor wiring
- •Loose or damaged sensor connector
- •Poor ground or reference voltage to the sensor
- •Hydraulic fault affecting sensor reading
- •Faulty ABS/TCS control module
- •Low system voltage
C0161 on GMC by Model
GMC Hummer EV(1 issue)
- Multiple Warning Lights with Speed Limited to 36 MPH2022-2024
Owners report a cascade of warning messages appearing simultaneously — 'One Pedal Driving Unavailable,' 'Service ESC,' 'Service Trailer Brake System,' and 'Service Active Steering System' — with the vehicle's speed limited to approximately 36 mph. The issue appears related to communication faults between the vehicle's multiple electronic control modules, particularly affecting the electric stability control and four-wheel steering systems. The Hummer EV's CrabWalk and Extract Mode features may also become disabled. The issue can occur without warning and may require a dealer visit to clear.
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View C0161 across all makes →Frequently Asked Questions
What does C0161 mean on GMC?▼
C0161 stands for "ABS/TCS Brake Pressure Sensor Circuit." This chassis code refers to a fault in the brake pressure sensor circuit used by the ABS and traction control system (TCS). That sensor reports hydraulic pressure in the brake system so the module knows how hard the driver is braking and can modulate ABS and traction/stability events accurately. The code sets when the sensor signal is missing, out of range, or the circuit is open/shorted. Normal braking usually continues to work, but ABS, traction, and stability functions may be disabled with warning lights illuminated. On GMC specifically, this code is documented across 1 model.
What causes C0161 on GMC vehicles?▼
Common causes on GMC: Faulty brake pressure sensor, Open, shorted, or corroded sensor wiring, Loose or damaged sensor connector, Poor ground or reference voltage to the sensor, Hydraulic fault affecting sensor reading. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C0161 on a GMC?▼
Repair costs vary widely depending on the root cause and specific GMC model.
Which GMC models have C0161 documented?▼
Au7o has documented C0161 on 1 GMC model: Hummer EV.