AutoCodes – Generic – C1D00

C1D00 Code - Park Brake Apply Switch Circuit Short To Ground

Quick Answer

The Instrument Panel Cluster (IPC) uses 3 basic messaged inputs to control the brake warning indicator. Common causes include Faulty Park Brake Apply Switch, Park Brake Apply Switch harness is open or shorted, Park Brake Apply Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: C1D00 indicates Park Brake Apply Switch Circuit Short To Ground.
Common causes: Common causes include Faulty Park Brake Apply Switch, Park Brake Apply Switch harness is open or shorted, Park Brake Apply Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 5,140

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Feb 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1D00 Description

The Instrument Panel Cluster (IPC) uses 3 basic messaged inputs to control the brake warning indicator. The first two are the parking brake warning indicator switch and the brake fluid level switch. The third is for the Electronic Brake Distribution (EBD) function controlled by the ABS module. The parking brake warning indicator switch and the brake fluid level switch status are sent from the Body Control Module (BCM) over the High Speed Controller Area Network (HS-CAN). The EBD message is sent from the ABS module over the HS-CAN.
The parking brake warning indicator switch is hardwired to the BCM through a single signal circuit while using a separate ground to control the input. The brake fluid level switch is hardwired to the BCM through separate signal and return circuits while using a separate ground to control the input.
The BCM provides a reference voltage to both the parking brake warning indicator switch and the brake fluid level switch. When the parking brake is applied, the parking brake warning indicator switch closes to ground, pulling the parking brake signal circuit low. When a low brake fluid level condition exists, the brake fluid level switch closes to ground, pulling the signal and return circuits low. If the brake fluid level switch is disconnected, the BCM reference voltage sent to the brake fluid level switch is sent high and the BCM sets DTC B1048:7B. When the BCM detects either the brake fluid level signal or the parking brake signal circuits low, or the brake fluid level signal and return circuit high, the BCM sends the IPC a brake warning indicator on request.
When the ABS module detects a base brake system concern or other ABS related concerns that affect the EBD function, the ABS module sends a brake warning indicator on request to the IPC to illuminate the brake warning indicator and the ABS warning indicator.

OBDII Code C1D00 - Park Brake Apply Switch Circuit Short To Ground - AutoCodes.com — C1D00 Code - Park Brake Apply Switch Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC C1D00?

Faulty Park Brake Apply Switch
Park Brake Apply Switch harness is open or shorted
Park Brake Apply Switch circuit poor electrical connection
Faulty Electronic Brake Distribution (EBD)

How to Fix the DTC C1D00?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1D00 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C1D00 code?

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Information for Specific Makes

C1D00 Ford — Park Brake Apply Switch Circuit Short To Ground
C1D00 Lincoln — Park Brake Apply Switch Circuit Short To Ground
C1D00 Mercury — Park Brake Apply Switch Circuit Short To Ground

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1D00 Code

1. What are the common symptoms of OBDII code C1D00 (Park Brake Apply Switch Circuit Short To Ground)?

- Common symptoms include the parking brake light staying on, the parking brake not releasing properly, and potential issues with the Electronic Parking Brake (EPB) system.

2. What can cause the OBDII code C1D00 to trigger?

- The code can be triggered by a short circuit to ground in the park brake apply switch circuit, which may be caused by damaged wiring, a faulty switch, or a malfunction in the EPB system.

3. How serious is the OBDII code C1D00 (Park Brake Apply Switch Circuit Short To Ground)?

- While this code may not affect the drivability of the vehicle, it should be addressed promptly to ensure the proper operation of the parking brake system.

4. How can I diagnose the OBDII code C1D00?

- Diagnosing this code typically involves using a scan tool to read the fault codes, checking the wiring and connections related to the park brake apply switch, and testing the switch itself for proper functionality.

5. What are some repair tips for fixing OBDII code C1D00?

- Repair tips may include inspecting the wiring harness for damage, testing the park brake apply switch for continuity, and addressing any issues with the EPB system components.

6. Can I drive my vehicle with the OBDII code C1D00 present?

- It is generally not recommended to drive the vehicle with this code present, as it may affect the proper operation of the parking brake system and compromise safety.

7. How much does it cost to repair OBDII code C1D00?

- The cost of repair can vary depending on the underlying cause of the issue, but it may involve replacing the park brake apply switch, repairing damaged wiring, or addressing EPB system malfunctions.

8. Can I reset the OBDII code C1D00 without fixing the issue?

- While you can clear the code with a scan tool, it is important to address the root cause of the problem to prevent the code from reoccurring and ensure the proper functioning of the parking brake system.

9. Will OBDII code C1D00 cause my vehicle to fail an emissions test?

- The impact on emissions testing may vary depending on local regulations, but it is advisable to address and resolve the issue to ensure the overall health and performance of your vehicle.

10. How can I prevent OBDII code C1D00 from coming back?

- Regular maintenance and inspection of the parking brake system, including checking for wiring damage and ensuring proper switch operation, can help prevent the recurrence of this code.