Question about 1998 Saab 900

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What does p0140 code mean n what culd i do about it

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O2 sensor. There are troubleshooting procedures here: http://www.obd-codes.com/p0140
Procedures require the use of a good OBD II scanner.
If you have the money, you can try replacing the sensor to see if it clears the code. It's easy to replace.

Posted on Sep 03, 2010

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Posted on Jan 02, 2017

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02 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)

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Copyright OBD-Codes.com

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Gm trouble code list


P0140 - 02 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
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What does code PO 140 mean


Yes, PO140: O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2

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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.
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Dec 14, 2012 | 1996 Plymouth Grand Voyager

1 Answer

I have a 1997 Chevy Blazer with the 4.3 engine. The Service Engine light keeps coming on. I scanned the codes and replaced the O2 sensor just before the catalytic converter. The light is still coming on...


P0146 pd means pending code
Pending codes and DTCs? Posted on November 12, 2010 by fcrmaster
When reading codes from your vehicle the fault code reader may show them as pending codes or normal Diagnostic Trouble Codes (DTC).
Pending codes (also known as continuous monitor codes) will be registered when an intermittent fault occurs. If that fault does not happen again after x number of start/stop cycles, the ECU will erase the code from memory. If the fault is persistent it becomes a DTC.
If you have read pending codes it is advisable to check the codes again after a week or so. If there is no apparent problem with the vehicle it is safe to erase the codes too and check back. But always make a note of any fault codes with the date and mileage of a vehicle.
If the codes read include a DTC then you need to investigate further. This you can either do yourself or advise your garage. If, again, you don't see an apparent problem (depending n the severity of the code) with the vehicle you can note the codes down and erase them. Then check again after a week or a few days depending on how often the vehicle gets used. If a repair has been made (previous owner) the DTC may just not have been reset after the repair.
The other numbers behind the code 01/06 , 02/06, 03/06 , 05/06 ,04/06 These don't mean anything . cheap code reader .
DTC P0140 HO2S Circuit Insufficient Activity Sensor 2
DTC P0146 HO2S Circuit Insufficient Activity Bank 1 Sensor 3
DTC P0171 Fuel Trim System Lean Bank 1
DTC P0174 Fuel Trim System Lean Bank 2
Sorry but this is something you should take to a qualified repair shop that has a diagnostic tool that can view sensor scan data.
Causes of lean condition trouble codes P0171 P0174 GM 5 3L

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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

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I went to get my car inspected and it was rejected because 2 codes showed up...P0743 and P0140...What are these codes


The P0743 is torque converter clutch circuit electrical. The P0140 is O2 sensor circuit no activity detected (bank 1 sensor 2).

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