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.
Manifold Pressure/Vacuum Sensor: Service and Repair
2011 Chevrolet HHR L4-2.2LSECTION Service and Repair
Manifold Absolute Pressure Sensor Replacement
Removal Procedure
1. Remove the throttle body. Refer to Throttle Body Assembly Replacement (Removal and Replacement).
2. Disconnect the evaporative emission (EVAP) purge tube from the intake manifold. Refer to Plastic Collar Quick Connect Fitting Service (Plastic Collar Quick Connect Fitting Service).
3. Disconnect the wiring harness clips from the fuel rail and reposition the harness out of the way.
4. Disconnect the manifold absolute pressure (MAP) sensor electrical connector.
5. Remove the MAP sensor.
Important: If the MAP sensor seal is damaged, the MAP sensor must be replaced.
6. Inspect the seal for damage.
Installation Procedure
1. Install the NEW MAP sensor seal, if required.
2. Install the MAP sensor.
3. Connect the MAP sensor electrical connector.
4. Position the wiring harness and connect the harness clips to the fuel rail.
5. Connect the EVAP purge tube to the intake manifold. Refer to Plastic Collar Quick Connect Fitting Service (Plastic Collar Quick Connect Fitting Service).
6. Install the throttle body. Refer to Throttle Body Assembly Replacement (Removal and Replacement).
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.