P1516 on Chevrolet

Throttle actuator control (TAC) module fault (GM)

Severity: Inspect soon

GM bulletins pair P1516 with reduced engine power, so the truck or car may lose power while driving; get it checked soon.

It gets more serious if:

Stop: Stop driving if engine power drops sharply in traffic or the vehicle will not keep speed safely.

This page covers only what differs on Chevrolet. For what P1516 means, the ranked causes and the test order, see the P1516 guide.

2003 · Silverado
Supported by vehicle data
GM 3040 pairs P1516 with a Service Engine Soon light or reduced engine power on 2003 trucks; the bulletin says the condition is normally very intermittent. Whether the bulletin is still current is not verified.
2006–2007 · Aveo
Supported by vehicle data
GM 06-06-04-050 ties P1516 with P2106 and P2110 to a frozen or stuck-closed throttle body in cold weather. Whether the bulletin is still current is not verified.

3040Status unverified
Service Engine Soon and/or reduced engine power, P0120, P0220, P1516, P1518
2003avalanche, silverado, suburban · NHTSA 10009377
Condition is normally very intermittent.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
3089Status unverified
Service Engine Soon and reduced engine power with P1516
2003–2006avalanche, corvette, express · NHTSA 10009520
Covers reduced engine power with P1516; P0120, P0220, P1514, P1515, P1518 and P2135 may also be present.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
060604042Status unverified
TAC module codes P2108, P1516, U0107, reduced engine power
2006–2007silverado-1500, tahoe, suburban-1500, express-1500 · NHTSA 10020880
Covers TAC module codes with reduced engine power.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
060604050Status unverified
Poor acceleration, throttle body frozen shut, P1516, P2106, P2110
2006–2007aveo · NHTSA 10020863
Cold-weather frozen or stuck closed throttle body.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

GM 3040: Service Engine Soon and/or reduced engine power, DTCs P0120, P0220, P1516 and/or P1518 — General Motors via NHTSA
GM 06-06-04-050: Poor acceleration, throttle body frozen shut or stuck closed, DTCs P1516, P2106 and/or P2110 — General Motors via NHTSA
GM 3089: Service Engine Soon and reduced engine power with DTC P1516 — General Motors via NHTSA

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error