Quote:
Originally Posted by Billfitz
The warning means the sensor was tripped. Once tripped it must be replaced to do a reset. You also may need to clear the fault codes with an OBD diagnostic tool before a reset is possible.
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If you replace the sensor and try to reset and it still says "reset impossible" you'll definitely need a scan tool. For whatever reason the CBS % remaining can hit 255% once the sensor is tripped and it prevents a dashboard reset. Took me months to figure this out until I followed Bill's advice and got an NT510.