Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble getting a steady signal from a sensor that checks the pressure of the fluid in the transmission. It's like trying to watch a video that keeps pausing and playing.
The P0844 code is triggered when the transmission control module (TCM) detects an intermittent signal from the transmission fluid pressure sensor/switch A.
The transmission fluid pressure sensor/switch A is responsible for monitoring the hydraulic pressure in the transmission. An intermittent circuit issue means that the sensor is not providing a consistent signal, which can lead to improper transmission operation.
• Check Engine Light is on
• Transmission may not shift properly
• Poor fuel economy
• Faulty transmission fluid pressure sensor/switch
• Damaged or corroded wiring or connectors
• Low transmission fluid level
Transmission: A system in a vehicle that transmits power from the engine to the wheels.
Sensor: A device that detects or measures a physical property and records, indicates, or otherwise responds to it.
• Scan the vehicle with an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Check the transmission fluid level and condition.
• Replace the faulty transmission fluid pressure sensor/switch.
• Repair or replace damaged wiring or connectors.
• Refill or replace the transmission fluid if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Honda Accord
• Toyota Camry
• Nissan Altima
• Regularly check and maintain transmission fluid levels.
• Inspect and clean connectors and wiring periodically.
• Schedule regular transmission maintenance.
Sensor Issue
• Avoid driving aggressively until the issue is fixed.
• Consult a professional mechanic for accurate diagnosis.
Check with your vehicle manufacturer for specific warranty coverage on transmission components.
This code has been associated with transmission issues in vehicles with high mileage or poor maintenance history.
Moderate – It is advisable to address this issue soon to prevent further transmission damage.
Driving with a faulty transmission sensor can lead to unsafe driving conditions. Address the issue promptly.
• Vehicle at operating temperature
• Transmission in gear
The transmission fluid pressure sensor/switch is typically located on or inside the transmission housing.
Q: Can I drive with a P0844 code?
A: It's not recommended to drive for extended periods with this code, as it may lead to further transmission damage.
Q: How do I reset the P0844 code?
A: After repairs, the code can be cleared using an OBD-II scanner. However, ensure the issue is resolved first.
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