What does P1517 mean on a Chevy?

P1517. Throttle actuator control module performance. Control module internal check failed. Applies to Silverado, Sierra, Tahoe, Yukon with 4.8L, 5.3L, 6.0L V8 2003 to 2006..

What causes P1517 on a Chevy?

Faulty TAC module Poor TAC module ground Corroded module connector Wiring short in TAC circuits Low battery voltage

How do I fix P1517 on a Chevy?

Check battery voltage and grounds Inspect TAC module connector Test module power and ground Check wiring for shorts Replace TAC module if it fails tests

Code

P1517

Throttle actuator control module performance

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: Silverado, Sierra, Tahoe, Yukon with 4.8L, 5.3L, 6.0L V8 2003 to 2006.
Related: No single generic twin. See OBD Codes List

What it means

P1517. Throttle actuator control module performance. Control module internal check failed. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Yukon with 4.8L, 5.3L, 6.0L V8 2003 to 2006..

Findings, check these first

Faulty TAC module
Poor TAC module ground
Corroded module connector
Wiring short in TAC circuits
Low battery voltage

Standard procedure

Check battery voltage and grounds
Inspect TAC module connector
Test module power and ground
Check wiring for shorts
Replace TAC module if it fails tests

Look up another code

Press / to jump to the box. Chevy-enhanced powertrain, body, chassis and network codes.

Sources and review

Review: checked against the recorded source material.

OBDII Code P1517 CHEVROLET - Electronic Throttle Module | Engine-Codes.com
archived reference page (engine-codes.com via Wayback Machine)
Supports: code identity and Chevrolet application
Fetched directly. Electronic throttle module is the GM name for the throttle actuator control module in the catalog. Model and year fitment remain curator claims.

Last updated 2026-09-25.

Report a correction for P1517. Include your vehicle, the issue and a source if you have one.