What is the P0847 fault code. Transmission Oil Pressure Sensor/Switch “B” Circuit Low Input malfunction description How to fix P0847 fault code? What are the causes and symptoms of the P0847 fault code error?
What is the P0847 fault code? What does it signify?
The P0847 code stands for “Transmission Oil Pressure Switch/Switch “B”, Circuit Low Input.” The transmission oil pressure sensor/switch converts the hydraulic pressure in the transmission to an electrical signal, which is transmitted to the powertrain control module. This signal is used to determine the transmission operating pressure while shifting by the PCM. Code P0847 will be activated if the PCM detects an issue with the hydraulic clutch, oil pressure switch or hydraulic clutch. This means that if the desired oil level and the current oil temperature do not match, code P0847 will be activated.
The code’s “B” label refers to an electronic circuit, not a component. To determine which “B” circuit is right for you, consult your vehicle’s specific repair manual.
The P0847 fault code can affect vehicles of all makes and models, including but not limited to Honda, Jeep, Peugeot or Pontiac.
What is the P0847 Fault Code and Why Does It Happen?
Here are some reasons why P0847 should be set.
- – A defective transmission oil pressure sensor/switch
- – Defective electronic pressure control solenoid
- – Defective electronic pressure regulator
- – Broken, melted or rusty wires. Loose connectors.
- – Low transmission oils
- – Use a dirty transmission oil
- – Blockage of transmission fluid passage lines
- – Internal transmission problems
- – Defective high pressure transmission pump
- – Defective hydraulic controller unit
- – Defective PCM / TCM (rarely)
- – Transmission oil leaks can be caused by gaskets or other components
- – Defective torque converter clutch connection
What are the symptoms of the P0847 Fault Code?
You may experience the following symptoms if your vehicle has the code P0847:
- – Illumination at the check engine lights
- – Hardiness in changing gears or being unable to do so at all
- Gearbox slipping
- – The gearbox is overheated
- Transmission oil leaks
- – Increased fuel use
- – Torque converter clutch not engaging or disengaging
- – PCM allows you to enter safe mode, lock the vehicle in 2nd and 3rd gears.
How to Fix the P0847 Fault Code
The following repairs may be able to resolve the P0847 fault code:
- – Replacing a defective electronic pressure control solenoid
- – Replacing a defective transmission oil pressure sensor
- – Replacing an electronic pressure regulator
- – Cleansing clogged transmission fluid passagelines
- – Repair of mechanical transmission failures
- – Flush the gearbox and change the oil with the filter
- – Topping up transmission oil that is not available
- Repair of damaged cables and connectors, as well as open or short circuits
- – Replacing a damaged transmission high-pressure pumps
- Repair of transmission oil leaks
- – Test and replacement of PCM and TCM
How serious is the P0847 fault code?
A vehicle with the P0847 Code is generally driveable. If not fixed, it can cause transmission damage and reduce transmission performance. There are a variety of problems that can occur when the transmission oil pressure sensor is not working or the hydraulic pressure is too low. Code P0847 should be addressed immediately and not delayed.
