What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
7Original wording in English
CHEVROLET, GMC
Reported code forms P0191
This Preliminary Information communication provides information to the technician about vehicles that may have a hard start, no start, rough running, or low fuel pressure. Technician may find Diagnostic Trouble Codes…
CHEVROLET, GMC
Reported code forms P0191
This Preliminary Information communication provides information to the technician about vehicles that may have a hard start, no start, rough running, or low fuel pressure. Technician may find Diagnostic Trouble Codes…
CHEVROLET, GMC
Reported code forms P0191
This Preliminary Information communication provides information to the technician about vehicles that may have a hard start, no start, rough running, or low fuel pressure. Technician may find Diagnostic Trouble Codes…
CHEVROLET, FOREST RIVER, GMC
Reported code forms P0191
This Preliminary Information communication provides information to the technician about vehicles that have a hard start or a no start. Technician may find Diagnostic Trouble Code DTCs P0087, P0088, P0191 or P128E.…
CHEVROLET, GMC
Reported code forms P0191
This Preliminary Information communication provides information to the technician about vehicles that may have a hard start, no start, rough running, or low fuel pressure. Technician may find Diagnostic Trouble Codes…
CHEVROLET, GMC
Reported code forms P0191
GENERAL MOTORS: MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED, INTERMITTENT DTC P0191, SLOW FUEL RAIL PRESSURE (FRP) DECAY, WIRING HARNESS CONNECTIONS, VOLTAGE FLUCTUATIONS/INTERRUPTIONS (FOLLOW CORRECTION INFORMATION…
Check vehicle applicability
11A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.