P0755 — Shift Solenoid B Malfunction
Category: Powertrain Severity: Medium
Updated:
DTC code P0755 means: Shift Solenoid B Malfunction. It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include low or degraded transmission fluid, faulty speed sensor or solenoid for the affected gear/shaft and wiring/connector issue; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Low or degraded transmission fluid
- Faulty speed sensor or solenoid for the affected gear/shaft
- Wiring/connector issue
- Internal transmission wear (worn clutch pack or band)
Symptoms
- Harsh, delayed or slipping shifts
- Transmission may enter limp/failsafe mode (stuck in one gear)
- Check engine light on
- Unusual noise when shifting
How to diagnose it step by step
- Check the transmission connector.
- Measure solenoid B.
- Check the ATF.
- Replace the solenoid.
How to fix it
Start by checking the transmission fluid level and condition — many of these codes trace back to low or old fluid. If the fluid is fine, the affected sensor or solenoid is the next suspect; internal mechanical wear is the last, more expensive possibility and usually needs a specialist.
Estimated repair cost
$60–250 + labor.
Frequently asked questions
What does DTC code P0755 mean?
Shift Solenoid B Malfunction.
Is code P0755 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P0755?
Only as needed.
Related codes
P0753 P0758 P0750 P0744 P0743 P0768 P0741 P0740 P0735 P0734
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