Check engine code P140

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03-28-2006, 10:20 PM

teal854t

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Check engine code P140

P140: Bad O2 Bank1 Sensor2. What does it mean by bank1 sensor2

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03-29-2006, 01:39 AM

kdh97602

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RE: Check engine code P140

bank 1 = side where the #1 cylinder is
sensor 2 = second sensor in line; depending on the vehicle, its the one behind the cat.

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03-30-2006, 11:02 PM

Chump

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RE: Check engine code P140

Usually turns out to be a bad cat, if that's the sensor behind it.
What year, model and engine?

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