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 MANUALSJEEP2011PATRIOT LATITUDE, 2.0 A, AUTOMATIC CVTREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMEMISSIONS CONTROLEVAPORATIVE EMISSIONSVALVE, POSITIVE CRANKCASE VENTILATION (PCV)DIAGNOSIS AND TESTINGDIAGNOSIS AND TESTING - PCV SYSTEM
2011 Jeep Patriot Latitude, 2.0 A, Automatic CVT
Diagnosis And Testing - PCV System
2011 Jeep Patriot Latitude, 2.0 A, Automatic CVTSECTION Diagnosis And Testing - PCV System
WARNING:
apply parking brake and/or block wheels before performing any test or adjustment with the engine operating.
- With engine idling, remove the hose from the PCV valve. If the valve is not plugged, a hissing noise will be heard as air passes through the valve. A strong vacuum should also be felt when a finger is placed over the valve inlet.
- Install hose on PCV valve. Remove the make-up air hose from the air plenum at the rear of the engine. Hold a piece of stiff paper (parts tag) loosely over the end of the make-up air hose.
- After allowing approximately one minute for crankcase pressure to reduce, the paper should draw up against the hose with noticeable force. If the engine does not draw the paper against the grommet after installing a new valve, replace the PCV valve hose.
- Turn the engine off. Remove the PCV valve from intake manifold. The valve should rattle when shaken.
- Replace the PCV valve and retest the system if it does not operate as described in the preceding tests. Do not attempt to clean the old PCV 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.