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The diagnostic trouble code P0841:00-28 indicates a range or performance issue with the Transmission Fluid Pressure Sensor/Switch A Circuit. This code is related to the transmission system and specifically the pressure sensor/switch that monitors the fluid pressure within the transmission.

Here are some possible causes and solutions for this issue:

  1. Faulty transmission fluid pressure sensor/switch: The pressure sensor/switch itself may be malfunctioning or providing inaccurate readings. In this case, the sensor/switch should be inspected and replaced if necessary. A professional mechanic should perform diagnostic tests to confirm the exact cause.
  2. Wiring or connector problems: Inspect the wiring harness and connectors associated with the transmission fluid pressure sensor/switch. Look for any signs of damage, such as frayed wires, loose connections, or corrosion. Repair or replace any damaged wiring or connectors as needed.
  3. Low transmission fluid level: Insufficient transmission fluid can affect the accuracy of the pressure readings. Check the transmission fluid level and ensure it is at the appropriate level. If it is low, refill it to the recommended level and inspect for any leaks that may be causing the fluid loss.
  4. Dirty or contaminated transmission fluid: Dirty or contaminated transmission fluid can impact the performance of the pressure sensor/switch and cause incorrect readings. Consider performing a transmission fluid flush and filter replacement to ensure clean fluid is circulating in the system.
  5. Check for other transmission issues: A malfunctioning pressure sensor/switch can sometimes be a symptom of other underlying transmission problems, such as a clogged filter or a faulty pump. It is recommended to have a professional mechanic or transmission specialist perform a thorough diagnosis of the transmission system to identify any additional issues that may need to be addressed.

It is important to note that these are general suggestions, and the specific diagnostic and repair procedures may vary depending on the make, model, and year of your vehicle. If you are unsure or uncomfortable performing these steps yourself, it is recommended to seek assistance from a qualified mechanic or dealership. They will have the expertise and tools to accurately diagnose and resolve the range or performance issue with the Transmission Fluid Pressure Sensor/Switch A Circuit.

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