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Home >> Jeep >> 1995 >> Grand Cherokee Limited, 5.2 Y, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 5.2L >> CODES/MESSAGES (Note: For DTC table, see TEST TC-1A under "Self-Diagnostic Tests.") >> Code 21

Code 21

DRB displays O2S STAYS AT CENTER. Condition is: no rich or lean signal detected from oxygen sensor input. DRB will display left or right O2S (if equipped).



DRB displays O2S SHORTED TO VOLTAGE. Condition is: oxygen sensor input voltage maintained at more than normal operating range. DRB will display left or right O2S (if equipped).

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