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Home >> Dodge and Ram >> 1988 >> Shadow Base, 2D Hatchback, 2.5 K, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> 2.2L Turbo Tests W/Codes >> Description >> Trouble Code Descriptions >> Code 21

Code 21

Oxygen sensor feedback circuit. Displayed if no oxygen sensor signal is sensed for more than 22 seconds when in closed loop.

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