Why does your 1987 Chevy g-30 flash code 45?

Anonymous

∙ 16y ago

Updated: 8/17/2019

Oxygen Sensor Circuit (Rich Exhaust). This may of may not be a defective O2 sensor. It may be something else that is effecting the O2 sensor. But considering the vehicle is 22 years old, I would suspect the O2 sensor needs replacing. I would replace the O2 sensor.

Wiki User

∙ 16y ago

What else can I help you with?

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