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Engine-Codes – Generic – P0821

P0821 Code - Gear Lever X Position Circuit

Quick Answer

The P0821 code indicates a problem with the gear lever X position circuit in the vehicle. Common causes include Faulty gear lever position sensor, Wiring issues in the gear lever X position circuit, Faulty transmission control module (TCM). 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
P0821 indicates Gear Lever X Position Circuit.
Common causes
Common causes include Faulty gear lever position sensor, Wiring issues in the gear lever X position circuit, Faulty transmission control module (TCM).
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 14, 2024
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Code P0821 Description

The P0821 code indicates a problem with the gear lever X position circuit in the vehicle. This code is typically found in vehicles with automatic transmissions. The gear lever X position circuit is responsible for detecting the position of the gear lever and sending this information to the vehicle's transmission control module (TCM). The TCM uses this information to determine the appropriate gear for the vehicle to be in.

OBDII Code P0821 - Gear Lever X Position Circuit
P0821 Code - Gear Lever X Position Circuit

Common Causes of P0821

  1. Faulty gear lever position sensor
  2. Wiring issues in the gear lever X position circuit
  3. Faulty transmission control module (TCM)
  4. Corrosion or damage to connectors in the circuit
  5. Electrical issues such as a blown fuse

Symptoms of P0821

  1. Difficulty shifting gears
  2. Erratic shifting
  3. Vehicle getting stuck in a particular gear
  4. Illumination of the Check Engine Light

How to Fix P0821

  1. Diagnose the issue by using a scan tool to read the code and determine the exact cause of the problem.
  2. Inspect the gear lever position sensor and wiring for any damage or corrosion. Replace any faulty components.
  3. Check the transmission control module (TCM) for any malfunctions. Replace if necessary.
  4. Inspect and repair any damaged connectors in the circuit.
  5. Clear the code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0821

The cost of repairing the gear lever X position circuit can vary depending on the specific cause of the issue and the make and model of the vehicle. On average, the repair costs for this issue can range from $200 to $500, including parts and labor. However, it is important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is recommended to check with local auto repair shops for a more accurate estimate.

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Code P0821 Information for Specific Makes

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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