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Home >> Chrysler >> 1984 >> E Class 2.2 E >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Fuel Injection System - Multi-Point >> Trouble Shooting >> Fault Codes >> Code 21
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Code 21

Problem with O2 Sensor feedback circuit. Occurs if engine temperature is above 170°F (77°C), engine speed is above 1500 RPM, but to O2 sensor signal for more than 5 seconds.

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