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Home >> Chevrolet >> 2001 >> Tracker 2D Utility, RWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics >> Diagnostic Tests >> DTC P1451: Barometric Pressure Sensor Performance >> Circuit Description
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Circuit Description

Barometric (BARO) pressure sensor and circuitry are located inside of PCM. PCM uses barometric pressure information in order to compensate for altitude changes. Barometric pressure sensor reading is displayed on scan tool when ignition is on and engine is not running.

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