October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Diagnostic Aids

Disregard Code 23 if SERVICE ENGINE SOON light goes out when throttle is returned to idle.

Fig 1: CODE 23, Schematic, TPS Misadjusted

Courtesy of GENERAL MOTORS CORP.

Fig 2: CODE 23, Flow Chart, TPS Misadjusted

Courtesy of GENERAL MOTORS CORP.