B1752 – Park/Neutral Switch Circuit Short To Ground

The ODBII code B1752 indicates a malfunction in the Park/Neutral switch circuit, specifically that there is a short to ground, which means the circuit is unintentionally connected to the ground, potentially causing issues with the vehicle’s transmission operation.

The severity of ODBII code B1752 Park/Neutral Switch Circuit Short To Ground is moderate to high.

Common Causes For: B1751 Park/Neutral Switch Circuit Short To Battery

• Damaged wiring or connectors
• Faulty park/neutral switch
• Short circuit in the wiring harness
• Corroded terminals
• Poor ground connections
• Malfunctioning transmission control module (TCM)

Common misdiagnosis for B1752 Park/Neutral Switch Circuit Short To Ground

• Faulty transmission range sensor
• Defective neutral safety switch
• Wiring issues or shorts in the harness
• Malfunctioning engine control module (ECM)
• Incorrectly installed or damaged transmission components
• Battery or charging system problems
• Faulty ignition switch

Common Troubleshooting Steps

The OBD-II code B1752 indicates a problem with the Park/Neutral switch circuit, specifically a short to ground. This code is often associated with automatic transmission vehicles and can affect the vehicle’s ability to start or shift properly. Here are some common troubleshooting steps to diagnose and resolve the issue:

• Check the Vehicle’s Manual: Refer to the vehicle’s service manual for specific information regarding the Park/Neutral switch and wiring diagrams.
• Visual Inspection: Inspect the wiring and connectors associated with the Park/Neutral switch for any signs of damage, corrosion, or loose connections.
• Look for frayed wires or any signs of wear that could cause a short to ground.
• Test the Park/Neutral Switch: Locate the Park/Neutral switch (usually found on the transmission).
• Use a multimeter to test the switch for continuity. Ensure that it operates correctly when the gear selector is in the Park and Neutral positions.
• Check for Shorts to Ground: With the multimeter, check the wiring harness for continuity to ground. Disconnect the connector from the Park/Neutral switch and test the wires leading to it.
• If you find continuity to ground where there shouldn’t be any, trace the wiring back to find the source of the short.
• Inspect Related Components: Check other components that may be connected to the Park/Neutral switch, such as the transmission control module (TCM) or engine control module (ECM).
• Ensure that there are no issues with the transmission range sensor or any other related sensors.
• Clear the Code and Test Drive: After performing repairs, clear the trouble code using an OBD-II scanner.
• Take the vehicle for a test drive to see if the code reappears. Monitor the vehicle’s performance to ensure that the issue has been resolved.
• Professional Diagnosis: If the problem persists after performing the above steps, consider seeking help from a professional mechanic or technician who has experience with your specific vehicle make and model.
• Check for Additional Codes: Sometimes, other trouble codes may be present that can provide additional context for the issue. Make sure to check for any other related codes. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1752 code. Always ensure safety precautions are taken when working on a vehicle’s electrical system.