The P0844 code is an OBD-II diagnostic trouble code that indicates a problem with the Transmission Fluid Pressure Sensor/Switch ‘A’ circuit. This code is often triggered when the engine’s control module (PCM) or Transmission Control Module (TCM) detects an intermittent signal from the transmission fluid pressure sensor.
What Does the P0844 Code Mean?
The P0844 code signifies that the PCM or TCM has detected an issue with the hydraulic pressure signals being sent from the transmission fluid pressure sensor. This sensor is crucial for managing the hydraulic fluid used to engage the clutches in the transmission, ensuring smooth gear shifts during operation.
What Causes the P0844 Code?
- Transmission Control Module (TCM) failure
- Low transmission fluid level
- Failure of the transmission fluid pressure sensor
- Wiring issues related to the sensor or circuit
What Are the Symptoms of the P0844 Code?
- Transmission may not shift properly
- Increased fuel consumption
- Potential slipping of the transmission
How Serious Is the P0844 Code?
The P0844 code is considered urgent and indicates that immediate action is necessary. Ignoring this code can lead to significant transmission damage and may affect the overall safety of the vehicle, potentially harming the driver and passengers.
How to Diagnose the P0844 Code
To diagnose the P0844 code, a mechanic will typically follow these steps:
- Use an OBD-II scanner to confirm the code and check for any related trouble codes.
- Inspect the transmission fluid level and condition.
- Examine the wiring and connectors related to the transmission fluid pressure sensor for signs of damage or corrosion.
- Test the transmission fluid pressure sensor to ensure it is functioning correctly.
- Check the functionality of the Transmission Control Module (TCM).
Common Repairs for the P0844 Code
- Replacing the transmission fluid pressure sensor
- Repairing or replacing damaged wiring or connectors
- Filling or flushing the transmission fluid
- Replacing the Transmission Control Module (TCM) if necessary
How Much Does It Cost to Fix the P0844 Code?
The cost to fix the P0844 code can vary significantly based on the underlying issue. Simple repairs, such as replacing the transmission fluid pressure sensor, may cost between $100 and $300, while more complex repairs involving the TCM can range from $500 to $1,500 or more, depending on labor costs and the make and model of the vehicle.
Can I Fix the P0844 Code Myself?
While some vehicle owners with mechanical experience may be able to address minor issues, such as checking fluid levels or replacing a sensor, it is generally recommended to seek professional assistance for diagnosing and repairing the P0844 code. Proper diagnosis is crucial to ensure that any underlying issues are resolved to prevent further damage to the vehicle.
