P0996
Transmission Fluid Pressure Sensor/Switch F Circuit Intermittent
Transmission
Generic OBD-II
Medium
What it means
P0996 means the transmission control module saw an intermittent or inconsistent signal from fluid pressure sensor/switch F, which monitors hydraulic pressure inside the transmission. Because the dropout comes and goes, symptoms are sporadic — an occasional harsh shift or a flickering warning light. The cause is usually a loose connector or chafed wiring rather than a hard sensor failure.
Medium
Can I keep driving? Usually yes, but shifts may occasionally turn harsh or unpredictable; because the fault is intermittent, get it diagnosed before it becomes constant.
Common symptoms
What you'll notice
- Check-engine light that comes and goes
- Occasional harsh or delayed shifts
- Inconsistent or unpredictable transmission behavior
- Other intermittent transmission codes may appear alongside it
Common causes
Most likely first
- Loose or intermittent connector at the fluid pressure sensor/switch FLikely
- Chafed or corroded wiring making occasional contactCommon
- Intermittently faulty transmission fluid pressure sensor/switch FCommon
- Low or aerated transmission fluid affecting readingsLess often
- Faulty transmission control module (TCM)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data to capture the conditions when the fault appears, and check fluid level and condition.
- Wiggle-test the sensor F connector and harness with a scan tool live to catch the intermittent dropout.
- Inspect and reseat the connector; repair chafed, corroded, or loose wiring.
- If the fault follows the sensor, replace fluid pressure sensor/switch F.
- Clear the code and drive several cycles to confirm; if it persists with good wiring, test the TCM.
FAQ
Quick answers
Is it safe to drive with P0996?+
Generally yes. Shifting is mostly normal with occasional glitches, but an intermittent fault can worsen, so don't ignore it.
Can I just clear P0996?+
It may stay away for a while since the fault is intermittent, but it returns when the sensor signal drops out again. Find the loose connection.
Related codes
Often seen with P0996
Read & clear P0996 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX