System: Powertrain (P-Code)
SAE Standard (Generic)
Family: EVAP Leak Detection Pump Performance
Code P24C1: EVAP System Leak Detection Pump Switching Valve Performance/Stuck Off
Diagnostic & Technical Explanation
Code P24C1 (EVAP System Leak Detection Pump Switching Valve Performance/Stuck Off) sets when the EVAP leak detection pump module's intake air filter is restricted enough that the pump cannot build the reference vacuum/pressure needed to run its leak test. Causes are a clogged or saturated filter element, debris ingestion, or a pump losing output over time.
First-listed procedure
Rank #1
Replace EVAP leak detection pump air filter
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: EVAP Leak Detection Pump Performance
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)