P0621 · Herstellerinformationen

BUICK, CHEVROLET · 2025-04-12

This Preliminary information communicates to the technician what to do when they encounter a service charging system message with a DTC P0621.

BUICK, CHEVROLET · 2025-02-14

This Preliminary information communicates to the technician what to do when they encounter a service charging system message with a DTC P0621.

CHEVROLET, GMC · 2016-03-24

This Preliminary Information communication provides information to the technician the steps to diagnose and repair vehicle with a Service Charging System message or Service Engine Soon Malfunction Indicator Lamp and the Engine Control Module may have set a P0621 and/or P0622. These concerns could be caused by the generator wiring harness rubbing on the Air Conditioning compressor line and shorting the circuits. Technician will inspect the generator wiring harness for chaffing and repair as necessary. Install additional conduit to protect the wiring harness from future issues.

CHEVROLET · 2015-12-01

Malfunction Indicator Lamp (MIL) Illuminated with DTCs P2096 and/or P0621 Set

CHEVROLET · 2015-12-01

Malfunction Indicator Lamp (MIL) Illuminated with DTCs P2096 and/or P0621 Set Condition/Concern Some customers may comment on the malfunction indicator lamp (MIL) being illuminated. Technicians may find diagnostic trouble codes (DTCs) P2096: Post Catalyst Fuel Trim System Low and/or P0621: Generator L-Terminal Circuit set as current or history

CHEVROLET · 2015-02-17

This Preliminary Information communication provides information to the technician about vehicles that may have an intermittent "Service Charging System" message on the Driver Information Center or a Battery Malfunction Indicator Lamp during an auto stop event. If there is no fault found during diagnostics for P0621 contact General Motors Technical Assistance Center for further assistance.

CHEVROLET · 2015-02-06

This preliminary informational bulletin provides repair information to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated with technicians finding DTCs P2096 and/or P0621 set.

CHEVROLET · 2014-11-13

This Preliminary Information communication provides information to the technician about vehicles that may have an intermittent "Service Charging System" message on the Driver Information Center or a Battery Malfunction Indicator Lamp during an auto stop event. If there is no fault found during diagnostics for P0621 contact General Motors Technical Assistance Center for further assistance.

CHEVROLET · 2014-11-01

GENERAL MOTORS 2014-2015 CHEVROLET MALIBU, 2015 CHEVROLET IMPALA: INTERMITTENT SERVICE CHARGING SYSTEM MESSAGE/ BATTERY MIL DTC P0621. *LJ

CHEVROLET, GMC · 2009-10-01

CHEVROLET/GMC: SHUTTLE BUS GENERATOR MODIFICATION P0621. DEALER MAY ENCOUNTER CONCERN OF A SES LIGHT ON WITH DTC P0621 FOUND. MANY CASES THESE VEHICLES ARE USED IN A SHUTTLE BUS APPLICATION. SOME UPFITTERS OF THE SHUTTLE BUSES ARE ORDERING THE VEHICLES WITH DUAL GENERATORS AND REMOVING ONE OF THE GENERATORS TO INSTALL AN ADD ON AIR CONDITIONING COMPRESSOR. *PE

SATURN · 2005-08-01

CRANK/NO START/EXTENDED CRANK (3 SECONDS OR GREATER) PRIOR TO VEHICLE START, DELAY INTO REVERSE, INOPERATIVE/INTERMITTENT OPERATION OF COMPONENTS AND/OR DIAGNOSTICS TROUBLE CODES (DTC) P0621, P0300-P0306, P0571, P0112, P0629, P0693, U2105, U2108, U1088, AND U1096 IN ELECTRONIC CONTROL UNIT (ECU). *TT

CHEVROLET, GMC · 2004-04-19

SERVICE ENGINE SOON LAMP BEING ILLUMINATED. WITH DIAGNOSTIC TROUBLE CODES P0507, P0621 OR P0622. GM VOICEMAIL EXPRESS. *TT

CHEVROLET, GMC · 2004-01-01

6.6 LB7 ENGINE WITH A NO CHARGE CONDITION WITH DIAGNOSTIC TROUBLE CODE P0380 P0621. *SC

CHEVROLET, GMC · 2004-01-01

A NO CHARGE CONDITION WITH DIAGNOSTIC TROUBLE CODE (DTC) P0380, P0621. *TT

CHEVROLET, GMC · 2004-01-01

DIAGNOSTIC TROUBLE CODE (DTC) P0621 AND/OR P0622. BATTERY CHARGE INDICATOR ILLUMINATED ON INSTRUMENT PANEL CLUSTER (IPC). *TT

CHEVROLET · 2004-01-01

THE CONDITION IA A SHORT FLASH OF THE BATTERY LIGHT AND DIAGNOSTICS TROUBLE CODE (DTC) P0621 AS A HISTORY CODE. *MJ

CHEVROLET · 2004-01-01

3.5L LX9 ENGINE DIAGNOSTIC TROUBLE CODE P0621.*MR

SATURN · 2003-11-01

SERVICE MANUAL UPDATE REGARDING TROUBLESHOOTING TABLE FOR DIAGNOSTIC TROUBLE CODE (DTC) P0621. *TT

SATURN · 2003-11-01

SERVICE MANUAL UPDATE REGARDING TROUBLESHOOTING TABLE FOR DIAGNOSTIC TROUBLE CODE (DTC) P0621. *PH