- 2013 CHEVY SONIC ENGINE INFORMATION EVAP PURGE SOLENOID VALVE MANUAL
- 2013 CHEVY SONIC ENGINE INFORMATION EVAP PURGE SOLENOID VALVE CODE
If it resets, continue with your diagnosis.Ĭonsult the service manual for particular system specifications and test EVAP purge solenoid/valve operation.
2013 CHEVY SONIC ENGINE INFORMATION EVAP PURGE SOLENOID VALVE CODE
Keep in mind that it may take several ignition cycles for this type of code to be reset. Clear all codes and test drive the vehicle. Write all this down so that you can come back to it later. Connect the scanner to the diagnostic connector and retrieve all stored codes and freeze frame data. Compromised charcoal elements cannot usually be replaced individually and will probably demand complete canister replacement.
If charcoal is found in the vacuum lines, immediately suspect a defective canister. Repair or replace defective vacuum lines and hoses as needed. Keep in mind that most of these vacuum circuits will have no vacuum present unless the purge control solenoid/valve is activated. If you have access to a smoke machine, it can make this process much easier. The EVAP system is comprised of a network of long vacuum lines and metal tubing, so this can be a chore in itself. Repair or replace damaged wiring and/or connectors as required. I have a habit of beginning my diagnosis with a visual inspection of all system wiring and connectors, as well as vacuum lines and hoses. Your issue may be a known issue with a known fix put out by the manufacturer and can save you time and money during diagnosis.Ī suitable diagnostic scanner, a digital volt/ohmmeter, a manufacturer’s service manual (or equivalent), and a smoke machine will help to diagnose code P0497. Cracked, crimped, or collapsed vacuum lines/hosesĪ good starting point is always to check for technical service bulletins (TSB) for your particular vehicle.Shorted or open circuit (wiring or connector) for the EVAP purge control solenoid/valve.Potential causes for this code to set are: In most cases, no symptoms will be exhibited.The sound of a vacuum leak from the underhood area.While it may slightly reduce fuel efficiency, there is no inherent danger involved. In this type of system, if EVAP pressure fails to drop sufficiently when the purge control valve is opened, a code will be stored and service engine soon lamp illumination may occur. Other systems utilize an EVAP pressure sensor to monitor and control purge and vent control solenoid operation. In some systems, if there is not sufficient change in manifold air pressure or exhaust oxygen content, when the purge control solenoid/valve is opened, a P0497 will be stored and a service engine soon lamp may be illuminated. Engine vacuum draws the fuel vapors into the intake manifold where they are burnt alongside conventional fuel. When vacuum reaches the canister, ambient air is drawn through the charcoal element and it releases the fuel vapors that have been store therein. This allows the valve to open and intake vacuum to reach the canister. In most cases, a constant supply of battery voltage is present at one terminal of the purge control valve and the PCM provides a ground pulse when drivability conditions are optimal. A constant intake vacuum supply hose (from the engine intake manifold) is attached to one opening of the purge control valve with a second line attached to the only other opening. The purge control solenoid/valve is usually located in the engine bay. The P0497 code is related to the EVAP purge valve. An EVAP pressure sensor is used to monitor EVAP system efficiency. The purge control solenoid is activated when the PCM deems that the engine is in a state to burn the EVAP fuel vapors efficiently. The canister contains a charcoal element that absorbs fuel vapors for release at the appropriate time. The pressure that is built when fuel is stored causes the vapors to vent into the tubes and eventually the canister. Fuel vapors are routed to the reservoir (usually called a canister), through a specially designed valve and network of metal tubes and rubber hoses. When I see that a code P0497 has been stored, I know that the powertrain control module (PCM) has detected a low flow condition in the evaporative emissions (EVAP) purge system.ĭesigned to capture fuel vapors (from the fuel tank) before they escape into the atmosphere, the EVAP system utilizes a closed reservoir to store excessive vapors until the engine is prepared to burn them.
Although generic, the specific repair steps may vary depending on make/model. This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to all 1996-newer vehicles (Ford, Honda, Mazda, Mercedes, VW, etc.). Evaporative Emission System Low Purge Flow What does that mean?