Buick Regal: DTC C0267
Diagnostic Instructions
- Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
- Refer to Diagnostic Procedure Instructions for an overview of each
diagnostic category.
DTC Descriptor
DTC C0267
Low Brake Fluid Indicated
For symptom byte information refer to Symptom Byte List.
Diagnostic Fault Information
Circuit/System Description
The brake fluid level switch monitors the level of the brake fluid in the
brake fluid reservoir. When the
brake fluid level switch input closed, the electronic brake control module will
set the DTC.
Conditions for Running the DTC
Ignition ON/Vehicle in Service Mode.
Conditions for Setting the DTC
Low brake fluid level is detected for 8 s.
Action Taken When the DTC Sets
- The electronic brake control module disables the traction control and
stability control for the
duration of the ignition cycle.
- The traction control/stability control-active indicator turns ON.
- The brake warning indicator turns ON.
Conditions for Clearing the DTC
The condition for setting the DTC is no longer present.
Reference Information
Schematic Reference
Hydraulic Brake Wiring Schematics
Connector End View Reference
Component Connector End View Index
Description and Operation
Brake Warning System Description and Operation
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Refer to Control Module References for scan tool information.
Circuit/System Verification
1. Verify that the brake is above minimum level.
Refer to Brake Fluid Loss.
- Go to next step: If above minimum level
Go to next step: Refer to Circuit/System Testing.
Circuit/System Testing
1. Ignition OFF/Vehicle OFF and all vehicle systems OFF, disconnect the
harness connector at the B20
Brake Fluid Level Switch. It may take up to 2 min for all vehicle systems to
power down.
2. Test for less than 10 Ω between the ground circuit terminal 2 and ground.
- Ignition OFF/Vehicle OFF.
- Test for less than 2 Ω in the ground circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, repair the open/high resistance in the ground
connection.
- Go to next step: If less than 10 Ω
3. Ignition ON/Vehicle in Service Mode.
4. Verify the scan tool Brake Fluid Level Sensor parameter is OK.
- If the parameter is not OK
- Ignition OFF/Vehicle OFF/Vehicle OFF, disconnect the harness connector
at the K17
Electronic Brake Control Module.
- Test for infinite resistance between the signal circuit terminal 1 and
ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance, replace the K17 Electronic Brake Control
Module.
- Go to next step: If the parameter is OK
5. Ignition OFF/Vehicle OFF.
6. Install a 3 A fused jumper wire between the signal circuit terminal 1 and
ground.
7. Ignition ON/Vehicle in Service Mode.
8. Verify the scan tool Brake Fluid Level Sensor parameter is Low.
- If the parameter is not Low
- Ignition OFF/Vehicle OFF, disconnect the harness connector at the K17
Electronic Brake
Control Module, ignition ON.
- Test for less than 1 V between the signal circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- Go to next step: If less than 1 V.
- Test for less than 2 Ω in the signal circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, replace the K17 Electronic Brake Control Module.
- Go to next step: If the parameter is Low
9. Test or replace the B20 Brake Fluid Level Switch.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Refer to Control Module References for electronic brake control module
replacement, programming and
setup.
READ NEXT:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Refe
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Refe
NOTE: The following steps must be completed before using the symptom
tables.
1. Perform the Brake System Vehicle Road Test before using the hydraulic
brake symptom tables in
order to duplicate the c
SEE MORE:
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instrument panel to the left of the
steering column.
There are four positions.
: Turns the exterior lamps off and
deactivates the AUTO mode. Turn
to again to reactivate the
AUTO mode.
In Canada, the headlamps will
automatically reactivate when the
vehicle is
This OnStar system consists of the following components:
Telematics communication interface control module
OnStar three button assembly
Microphone
Cellular antenna
Navigation antenna
Bluetooth antenna (If equipped)
Back up battery (If equipped)
WiFi Hotspot (If equipped)
TTY (Teletyp