Question about 1998 Jeep Cherokee 4WD

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1998 Jeep Cherokee Sport w/ 4 liter in-line 6, I have a check engine light on and the hand held diagnotic unit is telling me "BANK 1 SENSOR 1 HIGH VOLTAGE". What is the cause(s)?

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Your O2 sensor needs to be replaced. These sensors constantly out put voltage from .1 volts up to 1.3 volts, your sensor is stuck in the high range. It is the first O2 closest to the engine.

Posted on Sep 08, 2010

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