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Engine-Codes – Generic – P1844

P1844 Code - Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent

Quick Answer

The P1844 diagnostic trouble code (DTC) indicates a problem with the transmission fluid pressure sensor/switch 'A' circuit intermittently. Common causes include Faulty wiring or connections, Defective transmission pressure sensor/switch, Low transmission fluid levels. 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
P1844 indicates Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent.
Common causes
Common causes include Faulty wiring or connections, Defective transmission pressure sensor/switch, Low transmission fluid levels.
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 12, 2024
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Code P1844 Description

The P1844 diagnostic trouble code (DTC) indicates a problem with the transmission fluid pressure sensor/switch 'A' circuit intermittently. In automatic transmissions, the transmission fluid pressure sensor/switch plays a crucial role in monitoring the hydraulic pressure within the transmission. The sensor provides feedback to the vehicle's computer system, allowing it to adjust the transmission's operation for optimal performance and efficiency.

OBDII Code P1844 - Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent
P1844 Code - Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent

Common Causes of P1844

  1. Faulty wiring or connections
  2. Defective transmission pressure sensor/switch
  3. Low transmission fluid levels
  4. Internal transmission issues

Symptoms of P1844

  1. Erratic or harsh shifting
  2. Delayed shifting
  3. Transmission slippage
  4. Transmission going into fail-safe mode

How to Fix P1844

  1. Begin by conducting a thorough inspection of the wiring and connections related to the transmission fluid pressure sensor/switch 'A' circuit.
  2. Test the transmission pressure sensor/switch to determine if it is functioning correctly. Replace the sensor/switch if necessary.
  3. Check the transmission fluid level and quality. Top up or replace the fluid as needed.
  4. If the issue persists, perform a detailed diagnostic evaluation of the transmission system to identify any internal problems that may be contributing to the code.
  5. Clear the DTC and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P1844

The cost of repairing a transmission fluid pressure sensor/switch 'A' circuit intermittent issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, the cost of parts for this repair can range from $50 to $200, while labor costs typically range from $100 to $300. However, it's important to note that these costs are estimates, and actual repair costs may vary based on factors such as location, vehicle make and model, and the severity of the issue. It's recommended to consult with a qualified mechanic or auto repair shop to obtain a more accurate cost estimate for addressing the P1844 DTC.

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Code P1844 Information for Specific Makes

  • P1844 Buick — Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent
  • P1844 Cadillac — Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent
  • P1844 Chevrolet — Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent
  • P1844 GMC — Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent
  • P1844 Mitsubishi — Shift Fork 3 Malfunction
  • P1844 Oldsmobile — Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent
  • P1844 Pontiac — Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent
  • P1844 Saturn — Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent
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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