Understanding Subaru OBD-II Trouble Codes P0846
What are OBD-II Trouble Codes?
OBD-II (On-Board Diagnostics) Trouble Codes are diagnostic codes that are generated by a vehicle’s onboard computer system. These codes help technicians and mechanics identify and diagnose issues with a vehicle’s various systems and components.
What is P0846?
P0846 is a specific OBD-II Trouble Code that is associated with Subaru vehicles. It indicates a problem with the transmission fluid pressure sensor/switch B circuit. This sensor is responsible for monitoring the hydraulic pressure inside the transmission and sending the information to the vehicle’s computer system.
Symptoms of P0846
When a Subaru vehicle encounters the P0846 trouble code, the following symptoms may be experienced:
- Illuminated check engine light
- Transmission shifting issues
- Harsh or delayed shifting
- Decreased fuel efficiency
Causes of P0846
P0846 can be caused by various factors, including:
- Faulty transmission fluid pressure sensor/switch
- Low transmission fluid level
- Dirty or contaminated transmission fluid
- Wiring or connector issues
Diagnosing and Resolving P0846
When diagnosing and resolving the P0846 trouble code, it is recommended to:
- Inspect the transmission fluid level and condition
- Check the wiring and connectors associated with the transmission fluid pressure sensor/switch
- Replace the faulty sensor/switch if necessary
- Clear the trouble code and test drive the vehicle to ensure the issue has been resolved
If you are unsure about diagnosing or resolving the P0846 trouble code, it is best to consult a qualified mechanic or Subaru dealership for assistance.
