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Fault code P0140

Service engine light is on

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Gm trouble code list


P0140 - 02 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
The causes for a P0140 code are few and unless the wire/s has been damaged, replacing the sensor is usually the smartest thing to do.

Jul 12, 2014 | 2003 Chevrolet Suburban 1500

1 Answer

Code p0036,p0141,p0140


In order to get the light out you will have to replace the rear O2 sensor.

Mar 31, 2014 | 2001 Volkswagen Beetle

1 Answer

P0140 bank 1 sensor 2 1996 plymouth grand voyager minivan


Code 140 is for a problem with the O2 sensor bank one sensor two.
This sensor is behind the catalytic converter and tells the computer if the cat is working or not.
The code means the sensor voltage has not changed as often as it should.
Could be a faulty sensor, wiring harness problem, or other issue.
The sensor would need to be tested using a scanner.

Dec 14, 2012 | 1996 Plymouth Grand Voyager

1 Answer

I replaced both 02 sensors and still keep get a service engine soon light, with a code p0140 why?


The code is indicating that the reading the computer is picking from the rear O2 sensor is off. This can be caused by many things in the engine, rich fuel mixture, lean fuel mixture. A high-end scan tool needs to be hooked up and a diagnosis done.

Oct 09, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

My 2005 kia spectra has the check engine light on and its coming up with these codes can u tell me what they are?? p2237 p2243 p0030 p0140 p0171...


I have a 2005 Kia Spectra. The check engine light has been on and i got it checked. What does engine codes P0030 and P2237 mean?

May 22, 2011 | Kia Spectra Cars & Trucks

1 Answer

1996 Chevrolet pick up -- Service engine soon light stays on. Checked gas cap. It has code # PO140. Any help would be appreciated.


p0140 is 02 sensor ckt no activity ( bank 1 sensor 2). bank 1 sensor 2 is in back of convertor, it will need replaced it is sending wrong info to pcm.

Sep 16, 2010 | Chevrolet C1500 Cars & Trucks

1 Answer

My car indicates check engine sigh with following two codes 1: p0139 2: p0140


Hi Garcha,

Both codes relate to O2 Sensor # 2

Code P0139: O2 Sensor Circuit Slow Response - Bank 1, Sensor 2
Code P0140: O2 Sensor Circuit No Activity Detected - Bank 1, Sensor 2

A faulty O2 sensor will mean incorrect signals will be sent to the EFI computer, causing erratic engine running.


Cheers,


"If this has helped you in any way, please rate this solution" :-)



Jan 27, 2010 | Hyundai Motor 2002 Elantra

3 Answers

Check engine light is on, diagnostic code p0140 keeps comming up.


I had this problem with my 05 Trailblazer and it happened around 50k miles. The oxygen sensor needs to be replaced and the part costs about 90 bucks but atleast you will have you're check engine light off.

Dec 16, 2009 | 2005 Chevrolet TrailBlazer

1 Answer

Chevy wont start


sounds like seprate issues check for fuel pressure, and spark. the code refers to a poss bad o2 sensor wich would be a seprate issue since o2sensors typically wont keep it from starting, just use alot of gas. good luck

Sep 11, 2009 | 1999 Chevrolet Silverado 1500

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