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 MANUALSCHEVROLET2011MALIBU LTZ, 2.4 1REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 407 (ENGINE CONTROLS & FUEL - 3.5L - DTC P0340 TO DTC P2544)DTC P0443 OR P0449CIRCUIT/SYSTEM TESTING
2011 Chevrolet Malibu LTZ, 2.4 1
Circuit/System Testing
2011 Chevrolet Malibu LTZ, 2.4 1SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2007 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
P0443
- Turn OFF the ignition.
- Disconnect the EVAP canister purge solenoid valve.
- Turn ON the ignition, with the engine OFF.
- Probe the ignition 1 voltage circuit of the EVAP canister purge solenoid valve with a test lamp that is connected to a good ground.
- If the test lamp does not illuminate, test the circuit for an open or for a short to ground.
- Connect a test lamp between the control circuit of the EVAP canister purge solenoid valve and the ignition 1 voltage circuit of the EVAP canister purge solenoid valve.
- If the test lamp illuminates, test the control circuit of the EVAP canister purge solenoid valve for a short to ground.
- Command the EVAP canister purge solenoid valve to 50 percent with a scan tool.
- If the test lamp does not flash or illuminate with the command, test the control circuit of the EVAP canister purge solenoid valve for an open or for a short to voltage.
- If the circuits and the control module test normal, replace the EVAP canister purge solenoid valve.
P0449
- Turn OFF the ignition.
- Disconnect the EVAP canister vent solenoid valve.
- Turn ON the ignition, with the engine OFF.
- Probe the battery positive voltage circuit of the EVAP canister vent solenoid valve with a test lamp that is connected to a good ground.
- If the test lamp does not illuminate, test the circuit for an open or for a short to ground.
- Connect a test lamp between the control circuit of the EVAP vent solenoid valve and the battery positive voltage circuit of the EVAP canister vent solenoid valve at the EVAP vent valve harness connector.
- If the test lamp illuminates, test the control circuit of the EVAP canister vent solenoid valve for a short to ground.
- Command the EVAP canister vent solenoid ON and OFF.
- If the test lamp does not illuminate with the commanded state of the valve, test the control circuit of the EVAP canister vent solenoid valve for a short to voltage or an open.
- If the circuits and the control module test normal, replace the EVAP canister vent solenoid valve.
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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.