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Home >> Chrysler >> 1983 >> E Class 2.2 D >> Repair and Diagnosis >> Engine Performance >> System >> 2.2L EFI CEC System >> Testing & Diagnosis >> Fault Codes >> Code 21

Code 21

Problem with O2 Sensor feedback circuit. Occurs if engine temperature is above 170°F (77°C), engine speed is above 2000 RPM, but O2 sensor stays rich or lean for more than 22 seconds.

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