P0842 Fault Code

Transmission Fluid Pressure Sensor/Switch A Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0842 fault code indicates an issue with the Transmission Fluid Pressure Sensor or switch A circuit, specifically signaling that there is a low signal detected. This can lead to various performance problems in the vehicle's transmission system.

What are the symptoms of the P0842 code?

Symptoms associated with the P0842 code may include:

• Harsh or delayed shifting of the transmission
• Warning lights illuminated on the dashboard, such as the check engine light
• Slipping of the transmission
• Erratic behavior of the gear changes
• Poor acceleration or reduced power from the vehicle

What causes the P0842 code?

Common causes of the P0842 code include:

• A faulty transmission fluid pressure sensor
• Wiring issues such as short circuits or open circuits in the sensor circuit
• Poor electrical connections, including corroded or loose connectors
• Low transmission fluid level due to leaks
• Mechanical issues within the transmission itself

How to fix P0842?

To address the P0842 fault code, consider the following steps:

• Inspect the transmission fluid level and top it up if it's low.
• Check for leaks in the transmission system that could lead to low fluid levels.
• Test the pressure sensor for proper operation and replace if faulty.
• Examine the wiring and connectors for any signs of damage and repair as necessary.
• Clear the fault code and take the vehicle for a test drive to ensure the issue is resolved.