P0140 OBD Engine Code Logo   Code #P0140 -
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)

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Hyundai Sonata
Check engine light on intermittently. Returned code P0140, 02 Circuit, No Activity Detected Bank 1 Sensor 2. Car starts and runs fine


starts cold after a lil ride has trouble starting once u park and come back but starts with difficulty

P0140

running rough

Tried o2 sensor and I drive a Chevy lumina 96

had p0420 code, replaced cat,scan p0140 code now engine light off

GMC Safari
why do I have a 140 code showing after replacing cat.


Toyota Sequoia
0140


Scan indicates voltage on O2 sensor ranges between .2 and .8. So it appears that the O2 sensor is connected and operating. However I am getting the code.

doesn't seem to effect a infrequently used 1996 Buick LeSabre -haven't tried to fix it till now (inspection due!)

Buick LeSabre
no symptoms noticed


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p0454 code

p0140 check engine light stay on

Mercedes-Benz ML320
check engine light stay on


Had error message P0140, P0141, P0154 and P0155. Replaced both O2 sensors within two days error message returned.



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Other Comments

P0057 I didn't do nothing yet that's why I'm here to ask questions an you show me the complete diagram

P0171 Check engine light on

P0960 where are they

P0243 PO243 FAULT TURBO/SUPERCHARGER WASTEGATE SOLENOID 'A' POOR RUNNING AND HARDLY BRAKE RESPONSE

P0725 Dodge Caravan
light came on while backing out of my driveway van would not shift gears I pulled over shut off for 5 seconds started it up drove on it was fine for about 3 miles then kicked back into second pulled over and tried shutting it off but didn't work still stuck in limp mode....Terry




Other Check Engine Light Codes

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P0817   Starter Disable Circuit
P0959   Auto Shift Manual Mode Circuit Intermittent
P0984   Shift Solenoid "E" Control Circuit Range/Performance




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