Engine-CodesBuick – P1520 Buick

P1520 Buick Code - Transmission Range Switch Circuit

Quick Answer

The P1520 Buick code specifically refers to an issue with the transmission range switch circuit. Common causes include Worn out transmission range switch, Damaged or corroded wiring harness, Faulty connection in the circuit. 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
P1520 Buick indicates Transmission Range Switch Circuit.
Common causes
Common causes include Worn out transmission range switch, Damaged or corroded wiring harness, Faulty connection in the circuit.
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.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1520 Buick Description

The P1520 Buick code specifically refers to an issue with the transmission range switch circuit. This switch, also known as the neutral safety switch, is an essential component of the vehicle's transmission system. It is responsible for ensuring that the engine can only be started in the 'Park' or 'Neutral' positions, preventing the vehicle from moving while starting. The transmission range switch also plays a crucial role in determining the gear position of the transmission, allowing the vehicle to shift smoothly between gears.

OBDII Code P1520 Buick - Transmission Range Switch Circuit
P1520 Buick Code - Transmission Range Switch Circuit

Common Causes of P1520 Buick

  1. Worn out transmission range switch
  2. Damaged or corroded wiring harness
  3. Faulty connection in the circuit
  4. Electrical issues in the transmission range switch circuit

Symptoms of P1520 Buick

  1. Difficulty starting the vehicle
  2. Vehicle stalling unexpectedly
  3. Gear shifting problems
  4. Check engine light illuminated on the dashboard

How to Fix P1520 Buick

  1. Diagnose the issue by using a scan tool to retrieve the fault codes and testing the transmission range switch for proper operation.
  2. Inspect the wiring harness for any damage or corrosion, repairing or replacing any affected wires.
  3. Test the connection in the circuit to ensure proper signal transmission.
  4. Replace the transmission range switch if it is found to be faulty.
  5. Clear the fault codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1520 Buick

The typical repair costs for addressing the P1520 Buick code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of replacing the transmission range switch and addressing any wiring issues can range from $200 to $500, including parts and labor. However, it is essential to note that the actual cost may vary based on factors such as the location of the repair shop, the make and model of the vehicle, and the engine type. It is recommended to check with local auto repair shops for a more accurate estimate of the repair costs. Additionally, the diagnosis time and labor rates at auto repair shops can typically range from $80 to $150 per hour, with rates potentially higher at dealerships or in metropolitan areas and lower at independent shops.

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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.

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