P1523 GMC – Electronic Throttle Control Throttle Return

P1523 GMC Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light),No throttle response

P1523 GMC Possible Causes

Dead or weak battery,Faulty Throttle Actuator Control (TAC) module,Throttle Actuator Control (TAC) module harness is open or shorted,Throttle Actuator Control (TAC) module circuit poor electrical connection

P1523 GMC Description

The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. The TAC module continuously tests the integrity of this data. When the TAC module is unable to write or read data to and from random access memory (RAM), or the TAC module is unable to correctly read data from the flash memory or and internal TAC module processor fault is detected and the Diagnostic Trouble Code (DTC) is set.