What does P1514 mean on a Chevy?

P1514. Airflow To TP Sensor Correlation High. Applies to Silverado, Sierra, Tahoe, Yukon, Suburban, Avalanche.

What causes P1514 on a Chevy?

Carbon-fouled throttle body causing airflow to exceed modeled throttle angle Contaminated mass airflow sensor over-reporting intake airflow Vacuum leak downstream of the throttle body on Vortec V8 engines Failed throttle position sensor misreporting blade angle

How do I fix P1514 on a Chevy?

Clean the throttle body and MAF sensor and perform a TAC relearn before replacing parts Compare MAF grams-per-second against throttle angle on a Tech2/GDS2 scan tool at idle and 2500 RPM Smoke-test the intake for vacuum leaks skewing the airflow model Replace the throttle body assembly only if the correlation fault returns after cleaning and relearn

Code

P1514

Airflow To TP Sensor Correlation High

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: Silverado, Sierra, Tahoe, Yukon, Suburban, Avalanche
Related: No single generic twin. See OBD Codes List

What it means

P1514. Airflow To TP Sensor Correlation High. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Yukon, Suburban, Avalanche.

Findings, check these first

Carbon-fouled throttle body causing airflow to exceed modeled throttle angle
Contaminated mass airflow sensor over-reporting intake airflow
Vacuum leak downstream of the throttle body on Vortec V8 engines
Failed throttle position sensor misreporting blade angle

Standard procedure

Clean the throttle body and MAF sensor and perform a TAC relearn before replacing parts
Compare MAF grams-per-second against throttle angle on a Tech2/GDS2 scan tool at idle and 2500 RPM
Smoke-test the intake for vacuum leaks skewing the airflow model
Replace the throttle body assembly only if the correlation fault returns after cleaning and relearn

Look up another code

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Sources and review

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Last updated 2026-09-13.

Report a correction for P1514. Include your vehicle, the issue and a source if you have one.