AutoCodes – Generic – C116A

C116A Code - ABS Pressure Transducer/Brake Switch Mismatch

Quick Answer

The pressure transducer is integral to the Hydraulic Control Unit (HCU). Common causes include Faulty Hydraulic Control Unit (HCU), Hydraulic Control Unit (HCU) harness is open or shorted, Hydraulic Control Unit (HCU) 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: C116A indicates ABS Pressure Transducer/Brake Switch Mismatch.
Common causes: Common causes include Faulty Hydraulic Control Unit (HCU), Hydraulic Control Unit (HCU) harness is open or shorted, Hydraulic Control Unit (HCU) 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 6,986

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 Aug 19, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C116A Description

The pressure transducer is integral to the Hydraulic Control Unit (HCU). The pressure transducer sends a signal to the ABS module that varies in relation to the amount of pressure applied to the brake pedal. The more pressure that is applied, the greater the signal sent to the Anti-Lock Brake System (ABS) module. If a new pressure transducer is needed, then a new HCU must be installed.
When the brake pedal is pressed, the stop lamp switch closes and a voltage is sent to the Powertrain Control Module (PCM). The PCM then sends a message over the High-Speed Controller Area Network (HS-CAN) to the ABS module indicating that the brake pedal has been pressed. DTCs set in the ignition cycle can only be cleared by cycling the ignition off and on once the fault has been corrected.
This DTC sets in every ignition cycle if during normal operation, the stop lamp switch message does not match the HCU transducer, both signals have to agree about whether the brakes are being applied or not.

OBDII Code C116A - ABS Pressure Transducer/Brake Switch Mismatch - AutoCodes.com — C116A Code - ABS Pressure Transducer/Brake Switch Mismatch

What does this mean?

What are the Possible Causes of the DTC C116A?

Faulty Hydraulic Control Unit (HCU)
Hydraulic Control Unit (HCU) harness is open or shorted
Hydraulic Control Unit (HCU) circuit poor electrical connection

How to Fix the DTC C116A?

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 C116A 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 C116A code?

Need more information on how to fix the C116A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C116A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C116A Ford — ABS Pressure Transducer/Brake Switch Mismatch
C116A Lincoln — ABS Pressure Transducer/Brake Switch Mismatch
C116A Mercury — ABS Pressure Transducer/Brake Switch Mismatch

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 C116A Code

1. What are the common symptoms of OBDII code C116A ABS Pressure Transducer/Brake Switch Mismatch?

- Common symptoms include the ABS warning light staying illuminated on the dashboard, issues with the ABS system functioning properly, and potential loss of braking assist.

2. What could cause the OBDII code C116A ABS Pressure Transducer/Brake Switch Mismatch?

- This code is typically triggered when there is a discrepancy between the data received from the ABS pressure transducer and brake switch, indicating a problem with the communication or functionality of these components.

3. How can I diagnose the OBDII code C116A ABS Pressure Transducer/Brake Switch Mismatch?

- Diagnosis involves using a diagnostic scanner to read the code, checking the wiring and connections of the ABS pressure transducer and brake switch, and testing the functionality of these components.

4. Can a DIY enthusiast repair the OBDII code C116A ABS Pressure Transducer/Brake Switch Mismatch?

- While basic checks like inspecting wiring and connections can be done by DIY enthusiasts, resolving the underlying issue may require specialized tools and expertise. It's recommended to consult a professional mechanic for proper diagnosis and repair.

5. What are some repair tips for OBDII code C116A ABS Pressure Transducer/Brake Switch Mismatch?

- Repair may involve replacing a faulty ABS pressure transducer or brake switch, repairing damaged wiring or connectors, or reprogramming the ABS module to resolve the mismatch issue.

6. Is it safe to continue driving with the OBDII code C116A ABS Pressure Transducer/Brake Switch Mismatch?

- It's not advisable to continue driving with this code active, as it may affect the proper functioning of the ABS system, potentially compromising vehicle safety. It's recommended to address the issue promptly.

7. How much does it cost to fix the OBDII code C116A ABS Pressure Transducer/Brake Switch Mismatch?

- The cost of repair can vary depending on the specific cause of the issue, parts needed for replacement, labor charges, and whether any reprogramming is required. It's best to obtain a professional estimate for an accurate cost assessment.

8. Can weather conditions affect the triggering of OBDII code C116A ABS Pressure Transducer/Brake Switch Mismatch?

- Extreme weather conditions, such as extreme cold or heat, can potentially impact the functionality of ABS components, leading to the triggering of this code. Ensuring proper maintenance and protection of these components can help prevent weather-related issues.

9. Are there any recalls related to OBDII code C116A ABS Pressure Transducer/Brake Switch Mismatch?

- It's essential to check with the vehicle manufacturer or the National Highway Traffic Safety Administration (NHTSA) to determine if there are any recalls or technical service bulletins related to this specific OBDII code for your vehicle.

10. How often should I have the ABS system checked to prevent OBDII code C116A ABS Pressure Transducer/Brake Switch Mismatch?

- Regular maintenance inspections, such as during routine service intervals or when you notice any unusual ABS system behavior, can help catch potential issues early and prevent the triggering of this code.