System: Powertrain (P-Code)
SAE Standard (Generic)
Family: Vacuum Reservoir Pressure Sensor
Code P2528: Vacuum Reservoir Pressure Sensor Circuit High
Diagnostic & Technical Explanation
Code P2528 (Vacuum Reservoir Pressure Sensor Circuit High) sets when the ECM sees an open, shorted, or implausible signal from the pressure sensor monitoring the vacuum reservoir that supplies actuators such as the brake booster or emissions valves. Causes are a corroded sensor connector, a cracked sensor housing losing its vacuum seal, or wiring chafed near the reservoir's engine-bay mounting location.
First-listed procedure
Rank #1
Clean vacuum reservoir sensor 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: Vacuum Reservoir Pressure Sensor
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)