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Home >> Dodge and Ram >> 1994 >> Intrepid Base, 3.5 F >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 3.5L >> CODES/MESSAGES (Note: For DTC table, see TEST TC-1A under "Self-Diagnostic Tests.") >> Code 21
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Code 21

DRB displays O2S STAYS AT CENTER, LEFT O2S STAYS AT CENTER, or RIGHT O2S STAYS AT CENTER. Condition is: no rich or lean signal detected from oxygen sensor input.



DRB displays O2S SHORTED TO VOLTAGE, LEFT O2S SHORTED TO VOLTAGE, or RIGHT O2S SHORTED TO VOLTAGE. Condition is: oxygen sensor input voltage maintained at more than normal operating range.

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