Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
CADILLAC, CHEVROLET, GMC
Reported code forms P2120
This Preliminary Information communication provides information to the technician about vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on or reduced engine power message. Technician may find…
CADILLAC
Reported code forms P2120
This Preliminary Information communication provides information to the technician about vehicles that have Service Stabilitrak Message being displayed in the driver?s information center. Technician may find Diagnostic…
BUICK, PONTIAC
Reported code forms P2120
GENERAL MOTORS: MALFUNCTION INDICATOR LAMP-CHECK ENGINE LIGHT ON, HESITATION, REDUCED ENGINE POWER MESSAGE, DTCS P1125, P2101, P2120, P2125 OR P2138 SET (PERFORM REPAIR AS OUTLINED). *PE
CADILLAC, CHEVROLET, GMC
Reported code forms P2120
GMC: EI08047-INTERMITTENT MIL/SES, DTC(S) P2120, 02122, 02123, 02125, P2127, P2128, P2138 WITH REDUCED ENGINE POWER (REPLACE ACCELERATOR PEDAL). THIS MAY BE CAUSED BY CORROSION AT THE ACCELERATOR PEDAL CONNECTOR. *PE
BUICK, PONTIAC
Reported code forms P2120
GMC:SERVICE ENGINE SOON LIGHT AND DTC P1125, P2101, P2120, P2125, OR P2138. THE VEHICLE WAS EXHIBITING A HESITATION AND/OR HAD THE REDUCED POWER MODE SYMBOL OR MESSAGE DISPLAYED. *PE
CADILLAC, CHEVROLET, GMC
Reported code forms P2120
EI08047 - INTERMITTENT MIL/SES, DTC'S P2120, P2122, P2123, P2125, P2127, P2128, P2138 WITH REDUCED ENGINE POWER. *NJ
BUICK, CHEVROLET, GMC, OLDSMOBILE
Reported code forms P2120
4.2 5.3 LL8 LM4 ENGINE WITH DIAGNOSTIC TROUBLE CODE P2120 OR P2122 OR P2123 OR P2127 OR P2128. *MR
CHEVROLET, PONTIAC
Reported code forms P2120
REDUCED ENGINE POWER MESSAGE AND A DIAGNOSTIC TROUBLE CODE P1125 P2120 P2138. *TT