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Home >> Jeep >> 2009 >> Compass Limited, EDG, Automatic CVT >> Repair and Diagnosis >> Engine Performance >> System >> Emissions Control System >> Description >> Non-Monitored Circuits >> Cylinder Compression
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Cylinder Compression

The PCM cannot detect uneven, low, or high engine cylinder compression. Low compression lowers O2 content in the exhaust. Leading to fuel system, oxygen sensor, or misfire detection fault.

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