AutoCodes – Generic – B2187

B2187 Code - Rear Wiper Select Switch 'B' Short To Ground

Quick Answer

The Body Control Module (BCM) monitors the Rear Wiper Select Switch 'B'. Common causes include Faulty Rear Wiper Select Switch 'B', Rear Wiper Select Switch 'B' harness is open or shorted, Rear Wiper Select Switch 'B' 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: B2187 indicates Rear Wiper Select Switch 'B' Short To Ground.
Common causes: Common causes include Faulty Rear Wiper Select Switch 'B', Rear Wiper Select Switch 'B' harness is open or shorted, Rear Wiper Select Switch 'B' 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 3,420

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 Sep 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2187 Description

The Body Control Module (BCM) monitors the Rear Wiper Select Switch 'B'. The BCM sets the OBDII code when the Rear Wiper Select Switch 'B' is not to factory specifications.

OBDII Code B2187 - Rear Wiper Select Switch 'B' Short To Ground - AutoCodes.com — B2187 Code - Rear Wiper Select Switch 'B' Short To Ground

What does this mean?

What are the Possible Causes of the DTC B2187?

Faulty Rear Wiper Select Switch 'B'
Rear Wiper Select Switch 'B' harness is open or shorted
Rear Wiper Select Switch 'B' circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2187?

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 B2187 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 B2187 code?

Need more information on how to fix the B2187 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2187 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2187 Acura — Communication Line Driver Side MPCS Unit Cannot Send UART Messages
B2187 Buick — Power Seat Switch Circuit
B2187 Cadillac — Power Seat Switch Circuit
B2187 Chevrolet — Power Seat Switch Circuit
B2187 GMC — Power Seat Switch Circuit
B2187 Honda — Communication Line Driver Side MPCS Unit Cannot Send UART Messages

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 B2187 Code

What does the OBDII code B2187 mean?

B2187 indicates a short circuit to ground in the rear wiper select switch circuit 'B', which can affect the operation of the rear wiper.

What are common symptoms of a B2187 code?

Common symptoms include the rear wiper not functioning, intermittent operation of the rear wiper, or the rear wiper operating unexpectedly.

What can cause the B2187 code to trigger?

Potential causes include a faulty rear wiper switch, damaged wiring or connectors in the rear wiper circuit, or a malfunctioning Body Control Module (BCM).

How can I diagnose the B2187 code?

Start by inspecting the rear wiper switch and associated wiring for damage. Use a multimeter to check for continuity and ensure the switch is functioning correctly.

What should I check first if I have a B2187 code?

Begin with a visual inspection of the wiring and connectors related to the rear wiper switch for any signs of wear, corrosion, or damage.

Can I drive my vehicle with a B2187 code?

While you can technically drive the vehicle, the rear wiper may not function, which can be a safety concern in adverse weather conditions.

What are some repair options for a B2187 code?

Repairs may include replacing a faulty rear wiper switch, repairing damaged wiring, or replacing the Body Control Module if it is determined to be the source of the problem.

Will clearing the B2187 code fix the problem?

Clearing the code may temporarily turn off the check engine light, but if the underlying issue is not resolved, the code is likely to return.

How much does it typically cost to fix a B2187 code?

Repair costs can vary widely depending on the cause; simple wiring repairs may cost less, while replacing components like the BCM could be more expensive.

Can a bad rear wiper motor cause a B2187 code?

While a bad rear wiper motor can lead to wiper issues, the B2187 code specifically pertains to the select switch circuit. It's essential to diagnose the switch and wiring first.