Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 859 (ENGINE CONTROLS AND FUEL - 2.2L - DTC P0351 TO DTC P2544)DTC P0455CIRCUIT/SYSTEM TESTING
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Circuit/System Testing
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
- Refer to the J 41413-200: EEST operation manual for detailed instructions in Evaporative Emission System Diagnosis .
- Disconnect the purge tube at the quick connector on the EVAP canister side of the purge solenoid valve and install the CH 48096: Port Tool. Connect the J 41413-200: EEST to the CH 48096: Port Tool.
- Use a scan tool to seal the system and use the flow meter on the J 41413-200:
EEST, calibrated to 0.51 mm (0.020 in) to determine that there is no leak in the EVAP system.
- If a leak is detected use the J 41413-200: EEST to apply smoke to the EVAP system at the service port or the filler neck until the leak is located.
- Connect the J 41413-200: EEST nitrogen/smoke hose to the J 41413-311: EVAP Plug brass cone adapter. Disconnect the hose at the fuel cap end of the GE 41415-50: Adapter. Connect the J 41413-311: EVAP Plug to the disconnected hose on the GE 41415-50: Adapter. Install the GE 41415-50: Adapter filler neck end only to the vehicle.
- Start the engine.
- Allow the engine to idle.
- Use the Purge/Seal function to seal the system with a scan tool.
- Command the EVAP canister purge solenoid valve to 20 percent.
- The vacuum/pressure gauge on the J 41413-200:
EEST and the FTP parameter on the scan tool should both show vacuum.
- If the vacuum/pressure gauge shows vacuum but the FTP parameter does not show vacuum, replace the FTP sensor.
- If neither the FTP parameter nor the vacuum/pressure gauge shows vacuum, repair the restriction in the purge path.
- Verify that the vacuum increases to the abort limit on the scan tool or more than 3.2 volts, and the value is similar between the scan tool and the vacuum/pressure gauge on the J 41413-200:
EEST.
- If the values are not similar or the voltage did not reach 3.2 volts, replace the FTP sensor.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.