System: Powertrain (P-Code)
SAE Standard (Generic)
Family: Vehicle Speed Correlation
Code P215B: Vehicle Speed - Output Shaft Speed Correlation
Diagnostic & Technical Explanation
P215B (Vehicle Speed - Output Shaft Speed Correlation) is a plausibility check comparing vehicle speed as calculated from two independent sources — wheel speed sensors, transmission output shaft speed, or a secondary vehicle speed sensor — and flags when they disagree beyond the expected tolerance for tire slip. A mismatched tire size or worn tire on one axle, a failing wheel speed or output shaft speed sensor feeding one of the two signals, and a transfer case or differential slipping internally are the common causes.
First-listed procedure
Rank #1
Verify all four tires match specified size and tread depth
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 Correlation
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)