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DTC C0161

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.
    • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0161 04: Antilock Braking System Brake Pedal Position Sensor Circuit Open

DTC C0161 0E: Antilock Braking System Brake Pedal Position Sensor Circuit Low Resistance

Circuit/System Description

The body control module monitors the brake pedal position sensor and sends a serial data message to the electronic brake control module when the brake pedal is applied. The electronic brake control module compares the correlation between the brake pedal positions and the brake control brake pedal position sensor to sense the driver's application of the brake pedal.

Conditions for Running the DTC

C0161 04

    • Vehicle ON
    • The brake pedal is applied.
    • The ignition voltage is greater than 10 V.

C0161 0E

    • Vehicle ON
    • The ignition voltage is greater than 10 V.
    • The vehicle speed is greater than 15 km/h (9 mph).
    • The accelerator pedal position is greater than 20 percent.

Conditions for Setting the DTC

C0161 04

The brake pedal position sensor signal is not applied while the brake control brake pedal position sensor indicates the brake pedal is applied.

C0161 0E

The brake control brake pedal position sensor signal is showing the brakes applied while the vehicle speed is greater than 15 km/h (9 mph).

Action Taken When the DTC Sets

A driver information centre message and/or a warning indicator will not be displayed.

Conditions for Clearing the DTC
    • The condition for setting the DTC is no longer present.
    • The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Diagnostic Aids

The DTC C0161 may set if the brake pedal is applied while accelerating.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

Note: Diagnose all other brake lamp DTCs or Symptoms prior to performing this diagnostic procedure.

  1. Vehicle ON.
  2. Verify that DTC C0277 or C0890 is not set.
    3. ⇒If either DTC is set
        Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
    ⇓   If either DTC is not set
  3. Verify the brake pedal position sensor or the brake pedal is not binding causing residual brake pressure to be detected.
    4. ⇒If a condition is found
        Repair or replace the applicable component.
    ⇓   If a condition is not found
  4. Verify the scan tool electronic brake control module Brake Pedal Position Sensor Signal parameter changes between Applied and Released when applying and releasing the brake pedal.
    5. ⇒If the parameter does not change
        Refer to Symptoms - Lighting .
    ⇓   If the parameter changes
  5. Replace the K17 electronic brake control module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for electronic brake control module replacement, programming and setup

   


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