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Home >> Dodge and Ram >> 2018 >> ProMaster 1500 >> Repair and Diagnosis >> Engine Performance >> System >> Emissions Control >> Description >> Non-Monitored Circuits >> Fuel Pressure >> Cylinder Compression

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.