C0267 Code Explained: Causes, Symptoms & Pump Motor Circuit Open Fixes

C0267 Code Explained: Causes, Symptoms & Pump Motor Circuit Open Fixes

If your scan tool displays C0267, your vehicle’s Electronic Brake Control Module (EBCM) has detected an open circuit in the ABS hydraulic pump motor circuit.

The ABS pump motor is responsible for restoring hydraulic brake pressure during anti-lock braking events. While the ABS valves rapidly release brake pressure to prevent wheel lockup, the pump motor rebuilds pressure so braking remains effective. If the EBCM cannot energize the pump motor because of an open circuit, it stores C0267 and disables the ABS, Traction Control, and Electronic Stability Control (ESC/StabiliTrak) systems.

Unlike C0110, which generally indicates a pump motor circuit malfunction, and C0252, which points toward the pump motor relay circuit, C0267 specifically indicates that the EBCM has detected an open electrical path between the module and the ABS pump motor.

For additional chassis diagnostics and repair guides, visit our Complete OBD-II Trouble Code Guide:

https://my.prostreetonline.com/dtc-obdii

Quick Facts

ItemInformation
OBD-II CodeC0267
DescriptionABS Pump Motor Circuit Open
CategoryChassis (C) Codes
SystemAnti-lock Braking System (ABS)
Severity★★★★☆ High
Safe to Drive?Yes, but ABS and stability systems will be disabled
Common CausesOpen wiring, failed ABS pump motor, bad relay, faulty EBCM, blown fuse
Typical Repair Cost$75–1,800

What Does C0267 Mean?

The C0267 code indicates the Electronic Brake Control Module (EBCM) cannot complete the electrical circuit required to operate the ABS hydraulic pump motor.

The EBCM continuously monitors:

  • Pump motor voltage
  • Current flow
  • Relay operation
  • Circuit continuity

If the module commands the pump motor to operate but detects no current flow, it interprets the condition as an open circuit and stores C0267.

Common locations where an open circuit develops include:

  • Broken wiring
  • Loose electrical connectors
  • Failed relay contacts
  • Blown fuse
  • Failed pump motor windings
  • Internal EBCM faults

Symptoms of C0267

Common symptoms include:

  • ABS warning light illuminated
  • Traction Control warning light
  • Stability Control warning
  • Service Brake System message
  • Service StabiliTrak message (GM vehicles)
  • ABS disabled
  • No ABS activation during emergency braking
  • Stored C0267 diagnostic code

Normal hydraulic braking typically remains unaffected.

Common Causes

Failed ABS Pump Motor

An internally open motor winding prevents the pump from operating.

This is one of the most common causes.

Broken Wiring

Inspect for:

  • Broken conductors
  • Chafed harnesses
  • Rodent damage
  • Pinched wiring
  • Corrosion

Loose or Corroded Connector

High-current ABS connectors can develop:

  • Loose terminals
  • Corrosion
  • Heat damage
  • Moisture intrusion

Failed Pump Motor Relay

If the relay contacts fail to close, the pump motor receives no power.

Blown Fuse

A blown ABS pump fuse immediately creates an open circuit.

Always determine why the fuse failed before replacing it.

Faulty Electronic Brake Control Module

The EBCM may fail to provide power to the relay or incorrectly detect an open circuit.

How Serious Is C0267?

High.

Without an operational ABS pump motor, the following systems are generally disabled:

  • Anti-lock Braking System
  • Traction Control
  • Electronic Stability Control
  • Brake Assist

Emergency braking performance is significantly reduced on slippery roads.

Can You Drive With C0267?

Yes—but carefully.

Your standard hydraulic brakes continue to function, but:

  • Wheels may lock during panic stops.
  • Steering control under heavy braking is reduced.
  • Stability control intervention is unavailable.
  • Wet-weather stopping distances may increase.

Repairs should be completed as soon as possible.

How to Diagnose C0267

1. Scan the ABS Module

Use a professional scan tool capable of reading manufacturer-specific ABS codes.

Check for related codes including:

  • C0110
  • C0252
  • C0265
  • U-series communication codes

2. Check Battery Voltage

Verify:

  • Battery condition
  • Charging system output
  • Voltage at the ABS module

3. Inspect ABS Fuses

Inspect:

  • ABS pump fuse
  • Main ABS fuse
  • High-current fuse links

4. Test Circuit Continuity

Using a digital multimeter:

Verify:

  • Wiring continuity
  • Connector integrity
  • Proper resistance
  • No open circuits

5. Perform an Active Pump Test

Many professional scan tools allow activation of the ABS pump motor.

Verify:

  • Pump engagement
  • Current draw
  • Relay activation

No operation usually indicates an open circuit or failed motor.

6. Inspect the Pump Motor

Measure motor winding resistance.

Infinite resistance usually confirms an open motor winding requiring replacement.

Common Repairs

RepairEstimated Cost
Replace ABS fuse$20–50
Replace pump relay$40–120
Repair wiring$100–300
Replace ABS pump motor$400–1,000
Replace hydraulic control unit$700–1,600
Replace Electronic Brake Control Module$800–2,000

Common Diagnostic Mistakes

Technicians commonly:

  • Replace the ABS module before checking continuity.
  • Ignore blown fuses.
  • Fail to test pump motor resistance.
  • Overlook connector corrosion.
  • Skip active pump motor testing.

Vehicles Commonly Affected

C0267 is commonly found on:

  • Chevrolet Silverado
  • GMC Sierra
  • Chevrolet Tahoe
  • GMC Yukon
  • Chevrolet Suburban
  • Cadillac Escalade
  • Chevrolet Traverse
  • GMC Acadia
  • Buick Enclave
  • Chevrolet Express
  • GMC Savana

GM vehicles equipped with Bosch ABS systems report C0267 more frequently than many other manufacturers, although similar pump motor circuit codes exist across the industry.

How to Prevent C0267

Reduce the likelihood of C0267 by:

  • Maintaining battery health.
  • Inspecting ABS wiring during brake service.
  • Protecting electrical connectors from moisture.
  • Repairing damaged harnesses promptly.
  • Replacing weak relays before they fail.
  • Addressing ABS warning lights immediately.

Frequently Asked Questions

What causes C0267?

The most common causes include a failed ABS pump motor, broken wiring, blown fuse, faulty relay, damaged connectors, or an Electronic Brake Control Module fault.

Is C0267 dangerous?

Yes.

While conventional braking remains available, the loss of ABS and stability control significantly reduces emergency braking performance.

Can a blown fuse cause C0267?

Absolutely.

A blown ABS pump fuse is one of the first components that should be inspected.

Will C0267 clear itself?

No.

The open circuit must be repaired before the ABS module clears the code.

Does C0267 affect engine performance?

No.

The code only affects the braking and chassis control systems.

Final Thoughts

The C0267 code indicates an open circuit in the ABS pump motor electrical system, preventing the Electronic Brake Control Module from operating the hydraulic pump during anti-lock braking events. While everyday braking remains available, losing ABS, traction control, and stability control can significantly reduce safety during emergency situations.

Most repairs involve locating the open circuit, repairing damaged wiring, replacing a faulty relay or blown fuse, testing the pump motor, or diagnosing the Electronic Brake Control Module. Performing systematic electrical testing before replacing expensive components can save considerable repair costs.

For additional chassis diagnostics and repair guides, browse our complete Chassis (C) OBD-II Code Library:

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