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Home >> Cadillac >> 1991 >> Seville Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Tests >> Pcm Code EO43, Left O2 Sensor Rich Signal >> Test Conditions:
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Test Conditions:

Codes EO14, EO15, EO16, EO21, EO22, EO26, EO27, EO31, EO32, and EO34 not set, throttle switch open, throttle angle 6-30 degrees, coolant sensor greater than or equal to 136°F (58°C), oxygen sensor ready (closed loop), vehicle not accelerating or decelerating, engine speed greater than or equal to 800 RPM and canister purge has occurred at full duty cycle 10 minutes since engine was running with coolant temperature of 176°F (80°C) and throttle angle at 10 degrees or greater.