System: Powertrain (P-Code)
SAE Standard (Generic)
Family: Shift Solenoid Circuit
Code P0755: Shift Solenoid B
Diagnostic & Technical Explanation
Code P0755 (Shift Solenoid B) sets when the TCM detects an open circuit, out-of-range current, or a stuck-on/stuck-off performance fault while driving one of the transmission's shift solenoids, which route hydraulic pressure to select the current gear. Every solenoid letter shares the same diagnosis path: causes are a failed solenoid coil, sludge/debris jamming the solenoid's spool, or damaged control wiring at the internal valve-body connector.
First-listed procedure
Rank #1
Check transmission fluid level and filter condition
Easy DIY
This is the first procedure in the authored
consideration order, not a measured cause likelihood. Execute it only when its prerequisites
and diagnostic findings support it. Its cost and labor estimates (where known), the step-by-step procedure and the
remaining 3 procedure(s) are in the licensed dataset. Ordering context.
Full family: Shift Solenoid Circuit
What this page does not show
This page publishes the fault mechanism and the code index. The licensed dataset adds, for
every one of the 15,886 codes, the full authored repair set (56,729 procedures in total)
with the fields deliberately withheld here:
- Procedures 2..n after the first-listed procedure
- Aftermarket parts cost ranges in USD (
est_parts_cost_min/max_usd)
- Professional labor-hour estimates (
est_labor_hours)
- Step-by-step diagnostic and repair instructions
- Replacement-part mappings and catalog lookups
- 6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)