P0995
UniversalTransmission Fluid Pressure Sensor/Switch F Circuit High
Medium SeverityThis code indicates that the Powertrain Control Module (PCM) has detected a voltage reading from the Transmission Fluid Pressure Sensor/Switch F circuit that is higher than expected. This typically means there's an electrical issue preventing the sensor from accurately reporting transmission fluid pressure, which can lead to incorrect gear shifts or transmission performance problems.
⚠️ Before You Begin (Safety First)
Always ensure the vehicle is safely supported on jack stands if working underneath. Disconnect the battery before performing any electrical work or component replacement to prevent accidental shorts or injury. Allow the engine and transmission to cool down before handling any components to avoid burns from hot fluids or surfaces.
Common Symptoms
- Check Engine Light illuminated
- Harsh or erratic shifting
- Transmission slipping
- Delayed engagement of gears
- Vehicle stuck in 'limp mode'
- Poor fuel economy
Common Causes
- Faulty Transmission Fluid Pressure Sensor/Switch F
- Open or short in the sensor circuit wiring
- Corroded or damaged electrical connectors
- Faulty Powertrain Control Module (PCM) (less common)
- Internal transmission mechanical fault affecting pressure (rarely a direct cause of circuit high)
Frequently reported on: General/Universal, Chrysler Town & Country 2008-2016, Dodge Grand Caravan 2008-2016, Ford Focus 2012-2016, Honda CR-V 2007-2011
Diagnostic Steps
- Gather necessary tools including a multimeter, wiring diagrams, and potentially a replacement sensor.
- Safely lift the vehicle and locate the transmission fluid pressure sensor/switch F, often found on the valve body or within the transmission case.
- Inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections. Clean or repair as needed.
- Using a multimeter, check for continuity and resistance in the sensor circuit. Compare readings to manufacturer specifications.
- If the sensor tests faulty or the circuit shows an open/short, replace the Transmission Fluid Pressure Sensor/Switch F. This may require dropping the transmission pan and valve body.
- Clear the diagnostic trouble code with an OBD-II scanner and test drive the vehicle to ensure the issue is resolved.
👨🔧 When to Call a Professional
If you experience severe transmission issues such as slipping, harsh shifting, or the vehicle going into 'limp mode' immediately after this code appears, it is crucial to consult a professional transmission specialist to prevent further damage.
Commonly Asked Questions
What does 'Circuit High' mean for a sensor?
A 'Circuit High' condition typically means the sensor is sending a voltage signal that is above the expected range for its operating conditions, often indicating an open circuit, a short to voltage, or a faulty sensor sending an incorrect high signal.
Can I drive with a P0995 code?
While you might be able to drive, it's not recommended for long periods. The transmission may not shift correctly, which can lead to poor performance, further transmission damage, or leave you stranded. Address it as soon as possible.
Where is the Transmission Fluid Pressure Sensor F located?
The exact location varies by vehicle, but these sensors are usually located inside the transmission, often mounted on the valve body or within the transmission's hydraulic control unit. Access typically requires dropping the transmission pan.
Do I need special tools to replace this sensor?
You will likely need basic hand tools, an OBD-II scanner to clear codes, and possibly a torque wrench. Accessing the sensor might require draining transmission fluid and removing the transmission pan, so a fluid drain pan is also necessary.
Will replacing the sensor fix my shifting problems?
If the P0995 code is directly caused by a faulty sensor, then replacing it should resolve the shifting issues related to incorrect pressure readings. However, if there's an underlying mechanical transmission problem or wiring issue, merely replacing the sensor may not be enough.