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
5Original wording in English
BUICK, CADILLAC, CHEVROLET, GMC
Reported code forms P0340
This engineering informational bulletin ends the need for information from the field on vehicles that have the condition of Malfunction Indicator Lamp Illuminated with DTCs P0335, P0340, or P0365 Set.
BUICK, CHEVROLET
Reported code forms P0340
This Preliminary information communicatesthe steps to diagnose and repair the concern of MIL on with DTC'sP0335 P0340 P0365 set current or in history. The Technician is advised to Perform theBattery Inspection / Test in…
BUICK, CHEVROLET
Reported code forms P0340
This Preliminary information communicatesthe steps to diagnose and repair the concern of MIL on with DTC's P0335 P0340 P0365 set current or in history. The Technician is advised to Perform the Battery Inspection/Test in…
BUICK
Reported code forms P0340
This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Engineering Information — Malfunction Indicator Lamp Illuminated with DTCs P0335, P0340, or P0365…
BUICK, CHEVROLET
Reported code forms P0340
This Preliminary information communicatesthe steps to diagnose and repair the concern of MIL on with DTC'sP0335 P0340 P0365 set current or in history. The Technician is advised to Perform theBattery Inspection / Test in…
Check vehicle applicability
2A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Historical vehicle association; OBD-II compatibility is not established by this record.
Historical records · 1 · Historical vehicle association; OBD-II compatibility is not established by this record.
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.