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.
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HOMESERVICE MANUALSSATURN2009ASTRA XR, 2D HATCHBACK, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS AND FUEL - 1.6L (LDE OR LLU) AND 1.8L (2H0) - DTC PO341 TO DTC P2544DTC P0446CIRCUIT/SYSTEM VERIFICATION
2009 Saturn Astra XR, 2D Hatchback, Automatic
Circuit/System Verification
2009 Saturn Astra XR, 2D Hatchback, AutomaticSECTION Circuit/System Verification
- Ignition ON and fuel cap removed, verify that the FTP sensor parameter is between 1.3-1.7 volts.
- If not within the specified range, go to the FTP sensor section in Circuit/System Testing.
- Install the fuel cap.
- With the engine running, the EVAP canister vent solenoid valve open and the EVAP canister purge solenoid valve commanded to 100 percent, the fuel tank vacuum should not increase to more than 4.0 volts.
- If the fuel tank vacuum is greater than the specified range, go to the restriction section in Circuit/System Testing.
- Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
CAUTION:
Do not allow the FTP sensor voltage to exceed 4.5 volts or fuel tank damage may occur.
RENDER: 1.0x
NO RELATED
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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.