P0989
Transmission Fluid Pressure Sensor/Switch E Circuit Low
Transmission control
Generic OBD-II
Medium
What it means
P0989 means the transmission fluid pressure sensor/switch E circuit is reading low voltage. The control module relies on this signal to time and firm up shifts, so a low or lost reading can cause harsh shifting or a limp-mode fallback. Check the fluid level, then the sensor wiring and connector, before replacing the sensor itself.
Medium
Can I keep driving? Driveable but fix soon — a bad pressure signal can push the transmission into a default/limp strategy with harsh or limited shifting.
Common symptoms
What you'll notice
- Check-engine light on
- Harsh or delayed shifting
- Erratic shift behavior
- Possible limp (fail-safe) mode with limited gears
Common causes
Most likely first
- Faulty transmission fluid pressure sensor/switch ELikely
- Wiring shorted low or open in the sensor circuitCommon
- Corroded or loose connectorCommon
- Low transmission fluid affecting the pressure readingLess often
- Faulty transmission control module (TCM)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and check transmission fluid level and condition.
- Inspect the pressure sensor connector and wiring for a short-to-ground or open.
- Check the sensor's signal voltage with a scan tool against the expected range.
- Replace the fluid pressure sensor/switch E if its reading is out of range.
- If wiring and sensor are good, have the TCM tested and replaced as a last resort.
FAQ
Quick answers
Is it safe to drive with P0989?+
Short distances are usually fine, but the transmission may shift harshly or enter limp mode. Have it diagnosed before longer trips.
Can I just clear P0989?+
It returns until the sensor or wiring is repaired. Clearing it does not restore an accurate pressure signal.
Related codes
Often seen with P0989
Read & clear P0989 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