System: Powertrain (P-Code)
SAE Standard (Generic)
Family: Air System Pump Performance Circuit
Code P2C80: AIR System Pump Overspeed Bank 1
Diagnostic & Technical Explanation
Code P2C80 (AIR System Pump Overspeed Bank 1) sets when the secondary air injection pump on the named bank spins faster than commanded, runs hotter than its thermal limit, or reports a supply voltage fault - distinct from the simple stuck-on/stuck-off codes for the same pump. A worn pump bearing letting the motor overspin under light load, a failed internal thermal cutout, or a marginal supply connection causing voltage sag under load are the common causes.
First-listed procedure
Rank #1
Test air pump supply voltage under load
Moderate 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: Air System Pump Performance 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)