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P1807 Infiniti Code - Vehicle Speed Sensor A/T

Quick Answer

The P1807 code in an Infiniti vehicle refers to an issue with the Vehicle Speed Sensor A/T. Common causes include Faulty vehicle speed sensor, Damaged wiring or connectors, Corrosion or debris affecting sensor operation. 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
P1807 Infiniti indicates Vehicle Speed Sensor A/T.
Common causes
Common causes include Faulty vehicle speed sensor, Damaged wiring or connectors, Corrosion or debris affecting sensor operation.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P1807 Infiniti Description

The P1807 code in an Infiniti vehicle refers to an issue with the Vehicle Speed Sensor A/T. This sensor is responsible for monitoring the speed of the vehicle and sending this information to the transmission control module. The transmission control module uses this data to determine the appropriate shift points for the transmission, ensuring smooth and efficient operation.

OBDII Code P1807 Infiniti - Vehicle Speed Sensor A/T
P1807 Infiniti Code - Vehicle Speed Sensor A/T

Common Causes of P1807 Infiniti

  1. Faulty vehicle speed sensor
  2. Damaged wiring or connectors
  3. Corrosion or debris affecting sensor operation
  4. Issues with the transmission control module
  5. Electrical issues within the system

Symptoms of P1807 Infiniti

  1. Erratic shifting
  2. Harsh shifting
  3. Transmission slipping
  4. Limp mode activation
  5. Inaccurate speedometer readings

How to Fix P1807 Infiniti

  1. Begin by diagnosing the issue using a scan tool to confirm the P1807 code and pinpoint the exact cause.
  2. Inspect the vehicle speed sensor and its wiring for any visible damage or corrosion. Replace the sensor if necessary.
  3. Check the connectors and wiring associated with the sensor for any loose connections or frayed wires. Repair or replace as needed.
  4. Clear the code from the system using the scan tool and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the transmission control module or other related components.

Cost to Fix P1807 Infiniti

The cost of repairing a P1807 code in an Infiniti vehicle can vary depending on the specific cause of the issue. On average, the cost of replacing a faulty vehicle speed sensor can range from $100 to $300, including parts and labor. Additional costs may be incurred if wiring or connectors need to be repaired or replaced. It's important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Factors such as location, vehicle make and model, and engine type can also impact the overall repair costs. It's recommended to consult with a qualified mechanic or repair shop for a more accurate estimate based on your specific situation.

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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 P1807 Infiniti Code

1. What are the common symptoms of OBDII code P1807 (Infiniti) related to the Vehicle Speed Sensor A/T?

- Common symptoms include erratic speedometer readings, incorrect shifting patterns in automatic transmissions, and illumination of the Check Engine light.

2. What are the typical causes of OBDII code P1807 (Infiniti) indicating an issue with the Vehicle Speed Sensor A/T?

- Possible causes include a faulty vehicle speed sensor, damaged wiring or connectors in the speed sensor circuit, or issues with the transmission control module.

3. How can I diagnose OBDII code P1807 (Infiniti) associated with the Vehicle Speed Sensor A/T?

- Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the vehicle speed sensor and its wiring for damage, and testing the sensor's functionality using a multimeter.

4. Can I continue driving my vehicle with OBDII code P1807 (Infiniti) until it's repaired?

- It is not recommended to continue driving with this code active, as it can lead to further transmission issues and potential safety hazards due to inaccurate speed readings.

5. What are the repair options for resolving OBDII code P1807 (Infiniti) related to the Vehicle Speed Sensor A/T?

- Repair options include replacing the faulty vehicle speed sensor, repairing any damaged wiring or connectors, or reprogramming the transmission control module if necessary.

6. How much does it typically cost to repair OBDII code P1807 (Infiniti) involving the Vehicle Speed Sensor A/T?

- The cost of repair can vary depending on the extent of the issue, but it may range from around $150 to $400, including parts and labor.

7. Can a DIY enthusiast fix OBDII code P1807 (Infiniti) on their own?

- While some experienced DIY enthusiasts may be able to replace the vehicle speed sensor or repair wiring themselves, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

8. Are there any preventive measures to avoid OBDII code P1807 (Infiniti) related to the Vehicle Speed Sensor A/T in the future?

- Regular maintenance checks, prompt addressing of any transmission-related issues, and ensuring proper wiring connections can help prevent this code from reoccurring.

9. Is OBDII code P1807 (Infiniti) specific to certain Infiniti models?

- This code is specific to Infiniti vehicles and is related to the Vehicle Speed Sensor A/T system, commonly found in models like the Infiniti G35, FX35, and QX56.

10. How urgent is it to address OBDII code P1807 (Infiniti) linked to the Vehicle Speed Sensor A/T?

- It is important to address this code promptly to prevent further damage to the transmission system and ensure the vehicle operates safely and efficiently.

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