A shift solenoid is an electrically switched valve in the valve body. Manufacturers use these codes differently: Ford reports an open circuit with the base code and shorts separately, newer GM units have separate low/high codes, and the letter is not tied to a valve number (Saab's 9-5: A = valve S2). P0758 is the collective electrical code for solenoid B. GM's older 4-speeds flag open or short to ground at more than 43 of 50 failed counts; Subaru compares the driver transistor voltage for 30 ms, lights the MIL after two trips and holds third gear; on Saab's 5-speed Aisin box B is valve S3, checked by current; Hyundai's 8-speed uses it for the proportional valve of the 2-6 brake. Ford and newer GM do not use P0758.
Medium severity. Can I keep driving?Drive as little as possible and gently. If the transmission slips or stays in one gear, go slowly to a repair shop or call for a tow truck.
Symptoms
- Check engine or transmission warning lamp
- Limp mode in a fixed gear, no upshifts
- Harsh shifts from maximum line pressure
Most likely causes
- Open or corroded wire or transmission pass-through connector
- Solenoid coil open or shorted
- Internal harness or electronic module in the transmission
- Module driver faulty or valve supply missing
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It can trigger limp mode.
- It affects emissions.
What each character of P0758 means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- 7: Transmission
- 58: Specific fault in that system
Frequently asked questions
Can I keep driving with code P0758?
Drive as little as possible and gently. If the transmission slips or stays in one gear, go slowly to a repair shop or call for a tow truck.
What causes code P0758?
The most common causes are: open or corroded wire or transmission pass-through connector; solenoid coil open or shorted; internal harness or electronic module in the transmission.
Related codes
- P0976Shift Solenoid B Control Circuit Low
- P0977Shift Solenoid B Control Circuit High
- P0755Shift Solenoid B
- P0759Shift Solenoid B Intermittent
- P0753Shift Solenoid A Electrical
Sources
- gsi.ext.gm.com: 2006trans11
- saabwisonline.com: dtc p0758 shift solenoid b electrical
- saabwisonline.com: p0758
- static.nhtsa.gov: SB 10089604 0699
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.