Engine-CodesGeneric – P2802

P2802 Code - Transmission Range Sensor 'B' Circuit Low

Quick Answer

The P2802 diagnostic trouble code (DTC) indicates an issue with the Transmission Range Sensor 'B' Circuit being detected as low. Common causes include Faulty transmission range sensor, Damaged wiring or connectors in the transmission range sensor circuit, Corrosion or contamination of the transmission range sensor. 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
P2802 indicates Transmission Range Sensor 'B' Circuit Low.
Common causes
Common causes include Faulty transmission range sensor, Damaged wiring or connectors in the transmission range sensor circuit, Corrosion or contamination of the transmission range sensor.
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 11, 2024
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Code P2802 Description

The P2802 diagnostic trouble code (DTC) indicates an issue with the Transmission Range Sensor 'B' Circuit being detected as low. The transmission range sensor, also known as the neutral safety switch, is a crucial component that ensures the vehicle's transmission is in the correct gear according to the driver's input. This sensor is responsible for determining the position of the gear selector and relaying that information to the vehicle's engine control module (ECM) or transmission control module (TCM).

OBDII Code P2802 - Transmission Range Sensor 'B' Circuit Low
P2802 Code - Transmission Range Sensor 'B' Circuit Low

Common Causes of P2802

  1. Faulty transmission range sensor
  2. Damaged wiring or connectors in the transmission range sensor circuit
  3. Corrosion or contamination of the transmission range sensor
  4. Issues with the ECM or TCM programming
  5. Mechanical issues within the transmission system

Symptoms of P2802

  1. Difficulty shifting gears
  2. Incorrect gear selection displayed on the instrument cluster
  3. Harsh shifting or erratic shifting patterns
  4. Delayed engagement when shifting
  5. Vehicle stalling when shifting gears

How to Fix P2802

  1. Diagnose the issue by using a scan tool to retrieve the DTC and perform a visual inspection of the transmission range sensor and its wiring.
  2. Inspect the wiring and connectors for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the transmission range sensor using a multimeter to ensure it is functioning correctly. Replace the sensor if it is found to be faulty.
  4. Clear the DTC and perform a test drive to confirm that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying mechanical issues within the transmission system.

Cost to Fix P2802

The cost of repairing a Transmission Range Sensor 'B' Circuit Low issue can vary depending on the specific cause of the problem and the vehicle make and model. On average, the cost of replacing a transmission range sensor can range from $100 to $300 for the part alone. Labor costs can add an additional $100 to $200, depending on the shop's hourly rates and the complexity of the repair. Overall, the total repair cost can range from $200 to $500. It is advisable to contact local auto repair shops for a more accurate estimate based on your specific vehicle and location.

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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 P2802 Code

1. What are the common symptoms of OBDII code P2802 related to the Transmission Range Sensor 'B' Circuit Low?

- Common symptoms include difficulty shifting gears, erratic gear shifts, transmission slipping, and potentially the vehicle not starting.

2. What are the possible causes of OBDII code P2802 related to the Transmission Range Sensor 'B' Circuit Low?

- Possible causes include a faulty transmission range sensor, damaged wiring or connectors in the circuit, low transmission fluid levels, or a malfunctioning transmission control module.

3. How can I diagnose the issue causing OBDII code P2802 related to the Transmission Range Sensor 'B' Circuit Low?

- Diagnosis typically involves using a scan tool to read the code, checking the transmission range sensor for proper operation, inspecting the wiring and connectors for damage, and testing the transmission control module.

4. Can I drive my vehicle with OBDII code P2802 related to the Transmission Range Sensor 'B' Circuit Low?

- It is not recommended to drive the vehicle with this code as it can lead to further transmission issues and potentially unsafe driving conditions.

5. How can I repair OBDII code P2802 related to the Transmission Range Sensor 'B' Circuit Low?

- Repair options may include replacing the transmission range sensor, repairing or replacing damaged wiring and connectors, ensuring proper transmission fluid levels, and reprogramming the transmission control module if necessary.

6. Will OBDII code P2802 related to the Transmission Range Sensor 'B' Circuit Low cause damage to my vehicle if left untreated?

- Ignoring this code can potentially lead to further transmission problems, erratic shifting, and possible damage to the transmission components over time.

7. Can a DIY enthusiast fix OBDII code P2802 related to the Transmission Range Sensor 'B' Circuit Low?

- Depending on the skill level and access to tools, some DIY enthusiasts may be able to address this issue by following repair guides and procedures. However, it is recommended to seek professional help for accurate diagnosis and repair.

8. Is it common for the Transmission Range Sensor 'B' Circuit Low issue to reoccur after repair?

- Proper diagnosis, repair, and maintenance can help prevent the issue from reoccurring. However, if underlying causes are not addressed or if new issues arise, the code may come back.

9. How long does it typically take to repair OBDII code P2802 related to the Transmission Range Sensor 'B' Circuit Low?

- The repair time can vary depending on the exact cause of the issue, availability of parts, and the complexity of the repair. It is advisable to consult a professional for a more accurate estimate.

10. Can a faulty Transmission Range Sensor 'B' Circuit Low affect other systems in the vehicle?

- Yes, a faulty transmission range sensor can impact the vehicle's overall drivability, transmission performance, and may trigger related warning lights on the dashboard.

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