ABS Pump Power Limit Shutdown
The C1755 code indicates that the Electronic Brake Control Module (EBCM) has detected a power limit shutdown condition in the ABS/ESC pump motor circuit. This occurs when the module senses excessive current draw, a short to ground, or an internal failure in the pump motor driver, causing the EBCM to disable the pump to protect the hardware. As a result, ABS, traction control, and stability control functions are disabled.
1. Commonly Affected Makes
2. Most Common Causes
- Internal short circuit or mechanical seizure of the ABS/ESC hydraulic pump motor
- Short to ground or between wires in the pump motor wiring harness
- Internal failure of the power driver (MOSFET/transistor) within the EBCM
- Corrosion, bent pins, or poor connection at the EBCM or pump connectors
- Low battery voltage or excessive voltage fluctuations causing overcurrent during pump startup
3. Symptoms You Will Notice
- ABS, traction control, and stability control warning lights illuminated on the dashboard
- Loss of ABS, traction control, and stability control functions
4. Step-by-Step Diagnosis
Scan for additional codes and check freeze frame data
Inspect the pump motor wiring and connectors for damage, corrosion, or shorts
Test the pump motor resistance and check for mechanical binding
Check battery voltage and charging system performance
If wiring and pump are okay, suspect internal EBCM failure and consider replacement or reprogramming
5. Frequently Asked Questions
Is it safe to drive?▼
No, it is not safe to drive with this code active. The vehicle loses ABS, traction control, and stability control, significantly increasing the risk of loss of control during emergency braking or slippery conditions.
How much does it cost to fix?▼
Repair costs typically range from $200 to $1,500 depending on the cause. A simple wiring repair may cost $200-$400, while replacing the EBCM or pump motor can run $800-$1,500 including parts and labor.