AutoCodes – Mercury – U2002 Mercury

U2002 Mercury Code - Parking Brake Switch Internal Failure

Quick Answer

The parking brake switch has 3 positions; APPLY (pulled up), RELEASE (pushed down), and NEUTRAL. Common causes include Faulty Parking Brake Switch, Parking Brake Switch harness is open or shorted, Parking Brake 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: U2002 Mercury indicates Parking Brake Switch Internal Failure.
Common causes: Common causes include Faulty Parking Brake Switch, Parking Brake Switch harness is open or shorted, Parking Brake 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 672

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 Jun 11, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U2002 Mercury Description

The parking brake switch has 3 positions; APPLY (pulled up), RELEASE (pushed down), and NEUTRAL. The Anti-Lock Brake System (ABS) Module sends voltage to the parking brake switch and this voltage returns along 1 of 3 circuits. An open, excessive resistance or a short in the parking brake switch circuits or the parking brake switch causes the ABS module to set a Diagnostic Trouble Code (DTC). This DTC sets in continuous memory and on-demand if the test voltage sent to the parking brake switch from the ABS module does not return or returns along an incorrect path.

OBDII Code U2002 Mercury - Parking Brake Switch Internal Failure - AutoCodes.com — U2002 Mercury Code - Parking Brake Switch Internal Failure

What does this mean?

What are the Possible Causes of the DTC U2002 Mercury?

Faulty Parking Brake Switch
Parking Brake Switch harness is open or shorted
Parking Brake Switch circuit poor electrical connection

How to Fix the DTC U2002 Mercury?

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 does this mean?

Code Tech Notes

U2002:47 Parking Brake Switch: Watchdog / Safety Failure
U2002:96 Parking Brake Switch: Component Internal Failure

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U2002 Mercury 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.

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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 U2002 Mercury Code

1. What are the common symptoms of OBDII code U2002 (Mercury) related to Parking Brake Switch Internal Failure?

- The common symptoms include the parking brake warning light staying illuminated on the dashboard, erratic behavior of the parking brake system, and potential difficulty disengaging the parking brake.

2. What are the possible causes of OBDII code U2002 (Mercury) indicating Parking Brake Switch Internal Failure?

- The code U2002 can be triggered by a faulty parking brake switch, damaged wiring in the parking brake circuit, or a malfunction within the parking brake control module.

3. How can I diagnose OBDII code U2002 (Mercury) for Parking Brake Switch Internal Failure?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific fault code U2002, inspecting the parking brake switch and related wiring for any visible damage, and testing the switch for proper functionality.

4. Can I repair OBDII code U2002 (Mercury) related to Parking Brake Switch Internal Failure myself?

- While some DIY enthusiasts may attempt to address this issue by replacing the parking brake switch or repairing the wiring, it is recommended to consult with a qualified mechanic or dealership for accurate diagnosis and repair.

5. What are the potential risks of ignoring OBDII code U2002 (Mercury) linked to Parking Brake Switch Internal Failure?

- Ignoring this code can lead to safety risks due to potential malfunctions in the parking brake system, such as unintended engagement or disengagement of the parking brake while driving.

6. Is it safe to drive my Mercury with OBDII code U2002 indicating Parking Brake Switch Internal Failure?

- It is not recommended to drive the vehicle with this code present, as the parking brake system may not function correctly, compromising the safety of the vehicle and its occupants.

7. How much does it cost to repair OBDII code U2002 (Mercury) related to Parking Brake Switch Internal Failure?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve expenses for parts replacement, labor, and diagnostic services. It is advisable to obtain quotes from different repair shops for comparison.

8. Can a faulty parking brake switch trigger other OBDII codes besides U2002 (Mercury)?

- Yes, a faulty parking brake switch can potentially trigger other related OBDII codes, such as codes related to brake system malfunctions or electrical circuit issues.

9. Are there any preventative maintenance tips to avoid OBDII code U2002 (Mercury) associated with Parking Brake Switch Internal Failure?

- Regularly inspecting the parking brake system, including the switch and wiring, as part of routine maintenance can help identify potential issues early and prevent the occurrence of code U2002.

10. Will resetting the OBDII system clear the U2002 code for Parking Brake Switch Internal Failure?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the U2002 code is not addressed and repaired, the code is likely to reappear.