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Home >> Plymouth >> 1988 >> Colt E, 2D Hatchback >> Repair and Diagnosis >> Engine Performance >> System >> ECI System >> Self-Diagnostic Codes >> Diagnostic Code 1 (Oxygen Sensor)
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Diagnostic Code 1 (Oxygen Sensor)

If oxygen sensor signal does not change for 20 seconds or more in feedback range, check wiring harness and connector, oxygen sensor and ECU.