What Does P0996 Mean?
The TCM has detected an intermittent fault in the transmission fluid pressure sensor/switch 'F' circuit. The signal voltage is fluctuating erratically or dropping in and out of the valid range. This is typically caused by a loose connection, damaged wiring, or a sensor with an internal intermittent fault.
Common Causes
35%
Loose or corroded connector at pressure sensor F causing intermittent contact
30%
Chafed or broken wire in the transmission harness with intermittent continuity
25%
Pressure sensor F developing internal intermittent fault
10%
TCM connector with loose pin or intermittent ground connection
Diagnostic Steps
1
Step 1: Monitor the pressure sensor F PID in live data while tapping on the sensor and wiggling the connector. Any erratic jumps in the reading confirm a connection or sensor issue.
2
Step 2: Inspect the sensor F connector for spread terminals, corrosion, or moisture. Check for proper terminal tension by gently tugging on individual wires. Re-pin any loose terminals.
3
Step 3: Perform a wiggle test on the transmission harness from the sensor to the TCM while monitoring live data. Focus on areas where the harness passes through grommets or near heat sources.
4
Step 4: Measure resistance across the sensor while flexing and tapping it. Resistance should remain stable. Any flickering or open readings indicate an internal sensor failure requiring replacement.
5
Step 5: Inspect the TCM connector for backed-out pins or corrosion. Verify the TCM grounds have less than 0.1V drop under load.
Estimated Repair Cost
$100 - $550
Parts + labor, varies by vehicle and location
The TCM has detected an intermittent fault in the transmission fluid pressure sensor/switch 'F' circuit. The signal voltage is fluctuating erratically or dropping in and out of the valid range. This is typically caused by a loose connection, damaged wiring, or a sensor with an internal intermittent ...
The most common cause of P0996 (Transmission Fluid Pressure Sensor/Switch "F" Circuit Intermittent) is: Loose or corroded connector at pressure sensor F causing intermittent contact
Typical repair costs for P0996 range from $100 to $550, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Intermittent shift quality issues may occur unpredictably. The transmission could momentarily lose proper pressure control during a shift. Drive cautiously and repair soon.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0996 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Transmission Hydraulic Control
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
