AutoCodes – Generic – B1751

B1751 Code - Park/Neutral Switch Circuit Short To Battery

Quick Answer

The Body Control Module (BCM) monitors the Park/Neutral Switch. Common causes include Faulty Park/Neutral Switch, Park/Neutral Switch harness is open or shorted, Park/Neutral 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: B1751 indicates Park/Neutral Switch Circuit Short To Battery.
Common causes: Common causes include Faulty Park/Neutral Switch, Park/Neutral Switch harness is open or shorted, Park/Neutral 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 8,590

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 23, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1751 Description

The Body Control Module (BCM) monitors the Park/Neutral Switch. The BCM sets the OBDII code when the Park/Neutral Switch is not to factory specifications.

OBDII Code B1751 - Park/Neutral Switch Circuit Short To Battery - AutoCodes.com — B1751 Code - Park/Neutral Switch Circuit Short To Battery

What does this mean?

What are the Possible Causes of the DTC B1751?

Faulty Park/Neutral Switch
Park/Neutral Switch harness is open or shorted
Park/Neutral Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1751?

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 B1751 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 B1751 code?

Need more information on how to fix the B1751 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1751 code diagnosed by a professional: Find a repair shop in your area

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 B1751 Code

1. What are common symptoms of OBDII code B1751 (Park/Neutral Switch Circuit Short to Battery)?

The common symptoms of this code may include issues with starting the vehicle, the engine not cranking, or the vehicle not shifting out of park.

2. What causes the OBDII code B1751 to trigger?

The OBDII code B1751 is triggered when there is a short to battery in the park/neutral switch circuit, which can be caused by damaged wiring, a faulty switch, or a poor connection.

3. How can I diagnose the OBDII code B1751?

Diagnosing the OBDII code B1751 involves using a scan tool to retrieve the code, inspecting the wiring and connections related to the park/neutral switch, and testing the switch itself for proper functionality.

4. Can I still drive my vehicle with the OBDII code B1751 present?

It is not recommended to drive the vehicle with the OBDII code B1751 present, as it can lead to potential safety issues and further damage to the vehicle.

5. How do I repair the OBDII code B1751 (Park/Neutral Switch Circuit Short to Battery)?

Repairing the OBDII code B1751 involves identifying and fixing the short to battery in the park/neutral switch circuit, which may require repairing or replacing damaged wiring, the switch, or connectors.

6. Are there any DIY tips for fixing the OBDII code B1751?

While it is recommended to have a professional diagnose and repair the OBDII code B1751, DIY tips may include checking for loose connections, inspecting the wiring for damage, and testing the switch for continuity.

7. How much does it cost to repair the OBDII code B1751?

The cost of repairing the OBDII code B1751 can vary depending on the extent of the damage, parts needed for replacement, and labor costs. It is advisable to get a quote from a trusted mechanic.

8. Can a faulty park/neutral switch cause other issues besides triggering the OBDII code B1751?

Yes, a faulty park/neutral switch can cause other issues such as difficulties in starting the vehicle, problems with shifting gears, and issues with the vehicle's cruise control system.

9. Is the OBDII code B1751 specific to certain vehicle makes and models?

The OBDII code B1751 (Park/Neutral Switch Circuit Short to Battery) can be found in various vehicle makes and models that are equipped with an OBDII system and a park/neutral switch.

10. How can I prevent the OBDII code B1751 from occurring in the future?

To prevent the OBDII code B1751 from occurring in the future, it is essential to perform regular maintenance checks on the park/neutral switch, inspect the wiring for any signs of damage, and address any issues promptly.