System: Powertrain (P-Code)
SAE Standard (Generic)
Family: Vehicle Speed Sensor B Circuit
Code P2158: Vehicle Speed Sensor B Circuit
Diagnostic & Technical Explanation
P2158 (Vehicle Speed Sensor B Circuit) is a secondary vehicle speed sensor, separate from the primary wheel-speed-derived signal, used by some transmissions or transfer cases as a redundant input. The ECM/TCM distinguishes a missing signal, a signal reading low, or one that is intermittent/erratic, and the leading causes are a worn tone-ring/reluctor at the sensor's mounting point, a corroded connector, and a chafed signal wire near the transmission or transfer case.
First-listed procedure
Rank #1
Inspect and clean vehicle speed sensor B connector
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 2 procedure(s) are in the licensed dataset. Ordering context.
Full family: Vehicle Speed Sensor B 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)