P0758 means Shift Solenoid B Electrical. There is an open or short in the shift solenoid B circuit, so the computer cannot operate it. It is a generic OBD-II code, so the definition is the same on any make, but the most likely cause varies by engine; confirm with a scan tool and the service information for your vehicle before buying parts.
What P0758 means
Electronically controlled automatics are run by a transmission control module (TCM), a separate box or part of the engine computer. It reads speed sensors, the range sensor and fluid temperature to decide when to shift, and drives solenoids that apply clutches and the torque converter clutch. Many basic code readers only show the generic P0700; a scan tool that reads the transmission module shows the specific fault. Check fluid level and condition first, since low or burnt fluid causes many transmission codes.
P0758 symptoms
- Stuck in one gear or limp mode
- Missing shifts
- Check engine light
Common causes of P0758
- Failed shift solenoid B
- Internal harness or case connector fault
- TCM driver fault
How to diagnose P0758
- Measure solenoid resistance at the case connector
- Inspect the harness and connector
- Check the module output if the solenoid tests good
Can you drive with P0758?
Only as needed; shifting may be limited.
P0758 tips
Electrical solenoid codes can come from the internal harness rather than the solenoid itself. Testing resistance at the case connector checks both; then test the solenoid alone with the pan off.
Will P0758 clear itself?
If the fault stops, the computer turns off the check engine light by itself after several drive cycles without seeing it again, and the code stays in memory as history for a while. Clearing P0758 with a scan tool after a repair is fine, but if the cause is still there the code returns, sometimes within one drive. Disconnecting the battery also clears codes on most vehicles, but it erases learned fuel trims and idle settings as well.
Related codes
| Code | Meaning |
|---|---|
| P0756 | Shift Solenoid B Performance or Stuck Off |
| P0753 | Shift Solenoid A Electrical |
| P0750 | Shift Solenoid A Malfunction |
Guides that help
When it is more than a sensor
If the fault turns out to be internal (worn clutches, a failed converter or a damaged valve body), compare a rebuild with a replacement in transmission rebuild vs replacement and transmission replacement cost, identify your unit with what transmission do I have?, and browse our transmissions.
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