Transmission Fluid Pressure Sensor/Switch Circuit High
The P0995 code indicates that the transmission control module (TCM) has detected a voltage signal from the transmission fluid pressure sensor that is higher than the expected range. This sensor monitors hydraulic pressure within the transmission to ensure proper shifting. A high circuit condition can be caused by a faulty sensor, wiring issues, or internal transmission problems, potentially leading to harsh shifts, slipping, or limp mode.
01. Most Common Causes
- Faulty transmission fluid pressure sensor
- Short to voltage in sensor circuit wiring
- Damaged connector or corroded terminals
- Internal transmission malfunction (e.g., stuck valve)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or erratic shifting
- Transmission slipping or delayed engagement
- Vehicle enters limp mode
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Inspect the transmission fluid level and condition; top up or replace if necessary.
Step 3: Visually check the sensor wiring and connector for damage, corrosion, or shorts.
Step 4: Test the sensor voltage and resistance with a multimeter; compare to manufacturer specs.
Step 5: If sensor and wiring are okay, perform a transmission pressure test to rule out internal issues.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the transmission may shift erratically or fail, potentially causing further damage. Limp mode may limit speed and drivability.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for sensor replacement, but can be higher if wiring repairs or internal transmission work is needed.