P0759
Shift Solenoid B Intermittent
Transmission
Generic OBD-II
Medium
What it means
P0759 means the transmission control module has detected an intermittent electrical problem with shift solenoid B, which controls hydraulic pressure to engage a gear. Because the fault comes and goes, shifting may be erratic one moment and normal the next. Loose or corroded wiring is a common culprit, along with low or dirty fluid and the solenoid itself.
Medium
Can I keep driving? Often drivable, but intermittent faults can cause sudden erratic or harsh shifts and limp mode — repair before it becomes constant.
Common symptoms
What you'll notice
- Erratic or inconsistent shifting between gears
- Harsh or delayed shifts that come and go
- Occasional failure to shift into the expected gear
- Transmission may briefly drop into limp mode
- Check-engine light on
Common causes
Most likely first
- Intermittent fault in shift solenoid BLikely
- Loose, corroded, or chafed wiring and connectors in the solenoid B circuitCommon
- Low or contaminated transmission fluidCommon
- Sticking valve body from debris in the fluidLess often
- Failed transmission control module (TCM)Less often
How to diagnose & fix
Work through it in order
- Check transmission fluid level and condition; correct if low, dirty, or burnt.
- Wiggle-test and inspect the solenoid B connector and harness for intermittent breaks or corrosion — the usual cause of intermittent codes.
- Read freeze-frame data to see the conditions when the fault sets.
- Measure solenoid B resistance against spec and test its circuit; replace if out of range.
- If electrical checks pass, inspect the valve body for sticking. Clear and road-test to confirm.
FAQ
Quick answers
Is it safe to drive with P0759?+
Usually yes for short trips, but intermittent shift faults can worsen into constant harsh shifting or limp mode, so address it soon.
Can I just clear P0759?+
You can, but an intermittent wiring or solenoid fault will trip it again — often at random until the loose connection or part is fixed.
Related codes
Often seen with P0759
Read & clear P0759 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