Question 1

What does P1516 mean?

Accepted Answer

P1516 - TAC Module — Throttle Actuator Position Performance. GM-specific: Electronic throttle body not responding to PCM commands as expected.

Question 2

What are the symptoms of P1516?

Accepted Answer

Reduced engine power warning, Limp mode, Check engine light, May only idle

Question 3

What causes P1516?

Accepted Answer

Dirty throttle body (carbon), Failed electronic throttle body, Wiring issue, TAC module failure

Question 4

How much does it cost to fix P1516?

Accepted Answer

Typical repair cost: $100-$600. Clean throttle body first — carbon buildup is the most common cause. If not, throttle body assembly replacement ($150-400). Throttle body relearn procedure required after.

P1516 — TAC Module — Throttle Actuator Position Performance

Don't guess — diagnose P1516 the right way

Common symptoms of P1516

Common causes of P1516

Repair cost & difficulty

Vehicles commonly affected

Related trouble codes