What Does P0995 Mean?
The TCM has detected that the transmission fluid pressure sensor/switch 'F' circuit is reading abnormally high voltage. This indicates the sensor signal is above the expected range, suggesting an open circuit, disconnected sensor, or a short to voltage in the wiring. The TCM cannot accurately regulate hydraulic pressure with an erroneous high reading.
Common Causes
35%
Open circuit in sensor F signal wire or disconnected connector
30%
Faulty transmission fluid pressure sensor F with internal open circuit
20%
Signal wire shorted to voltage source or 5V reference wire
15%
TCM ground circuit fault or TCM internal failure
Diagnostic Steps
1
Step 1: Inspect the pressure sensor F connector at the transmission case. Look for disconnected, loose, or corroded terminals. Verify the connector lock is fully seated.
2
Step 2: Measure voltage on the sensor signal wire with KOEO. A reading near 5V (reference voltage) with the sensor connected indicates an open in the sensor or ground circuit.
3
Step 3: Disconnect the sensor and measure resistance between signal and ground pins. An open-line reading (OL/infinite) confirms a failed sensor. Expected resistance varies by manufacturer (typically 30-100 ohms at rest).
4
Step 4: Verify continuity of the ground wire from the sensor connector back to the TCM. Resistance should be less than 1 ohm. Also check for chafed wires shorting signal to the 5V reference.
5
Step 5: Monitor pressure sensor F PID in live data while wiggling the harness. Erratic readings point to an intermittent connection issue in the harness or connector.
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The TCM has detected that the transmission fluid pressure sensor/switch 'F' circuit is reading abnormally high voltage. This indicates the sensor signal is above the expected range, suggesting an open circuit, disconnected sensor, or a short to voltage in the wiring. The TCM cannot accurately regula...
The most common cause of P0995 (Transmission Fluid Pressure Sensor/Switch "F" Circuit High) is: Open circuit in sensor F signal wire or disconnected connector
Typical repair costs for P0995 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Transmission may default to limp mode with firm shifts or lock in a single gear. Safe for short distances but should be repaired promptly to prevent further transmission damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0995 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission Hydraulic Control
Difficulty
Type
Generic (SAE)
Recommended Tools
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