P0755 — Shift Solenoid "B" Malfunction
Drive with caution — fix soon.
What P0755 means
P0755 indicates a malfunction in shift solenoid "B", which the transmission uses to control fluid flow and engage gears. When this solenoid fails or its circuit has a fault, the transmission can shift erratically or stay locked in one gear. This is most often an electrical or solenoid problem rather than full mechanical failure.
Common symptoms
- Check Engine light is on
- Erratic or harsh shifting
- Transmission stuck in one gear (limp mode)
- Slipping between gears
- Higher RPMs without a matching gear change
Common causes
- Faulty shift solenoid "B"
- Low or contaminated transmission fluid
- Damaged wiring or corroded connectors
- Clogged or worn valve body
- Faulty transmission control module
Typical repair cost
$150 – $500
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0755 code?
Short trips are usually okay, but don't make a habit of it. The transmission may shift roughly or drop into limp mode, so plan to get it checked soon and avoid hauling heavy loads.
How much does it cost to fix a P0755?
Most repairs land between $150 and $500. Fluid service or wiring repairs cost less, while replacing the shift solenoid or servicing the valve body sits at the higher end.
Is a P0755 code serious?
It's a moderate issue. Your car will likely still move, but continued driving with bad shifting can damage the transmission, so it's worth fixing without much delay.
Why did my transmission go into limp mode with P0755?
When the control module can't trust the solenoid, it locks the transmission into a safe gear to protect it. Fixing the solenoid or its circuit usually clears the limp mode.