P0849 Fault Code

Transmission Fluid Pressure Sensor/Switch B Circuit Intermittent

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

The P0849 fault code indicates an intermittent issue with the Transmission Fluid Pressure Sensor or Switch B Circuit. This component is crucial for ensuring the proper functioning of the transmission by monitoring the fluid pressure and relaying this information to the vehicle's computer systems. When this circuit encounters intermittent faults, it can lead to improper shifting and other transmission-related issues.

What are the symptoms of the P0849 code?

Drivers may experience a variety of symptoms when the P0849 code is present such as:

• Harsh or erratic transmission shifts
• Delayed or slipping transmission engagement
• Transmission warning light illuminated on the dashboard
• Reduced fuel efficiency due to improper operation of the transmission
• Potential overheating of the transmission fluid due to incorrect pressure readings

What causes the P0849 code?

The most common causes of the P0849 code include:

• Faulty Transmission Fluid Pressure Sensor or Switch
• Damaged wiring or connectors in the sensor circuit
• Poor electrical connections causing intermittent signals
• Low transmission fluid levels or contamination affecting sensor operation
• Transmission control module software issues or faults

How to fix P0849?

To resolve the P0849 fault code, the following steps should be taken:

• Inspect the wiring and connectors for any signs of damage or corrosion and repair as needed.
• Check the transmission fluid level and quality; replace or top off if necessary.
• Test the Transmission Fluid Pressure Sensor for proper function and replace it if it malfunctions.
• Update or reprogram the transmission control module software if it is outdated or has known issues.
• Clear the fault codes from the vehicle's computer and monitor for any reoccurrence of the P0849 code.