What's your o2 sensor story.
When my o2 sensor wires fell onto the exhaust pipe I discovered:
the heater section of the 4 wire type sensors carry a very large amount of electrical current in order to heat up the sensor tip.
Like maybe enuff to fry other parts of the electrical harness or the ECU?
Additionally, if you drive in deep water and get your sensor wet it may be toasted for good, or if you blow a head gasket and pass water thru the exhaust?
What kind of story would you like to share about your Code 21 experience?
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