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2001 oldsmobile silhouette 3.4l engine. Still getting P0140 code after replacing both O2 sensors. What is causing the SEL and code?

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  • Cars & Trucks Master
  • 377 Answers

Disconnect your battery for 1 hour then reconnect ,,should reset the code error

Posted on Oct 18, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 14 Answers

SOURCE: Check Engine Light - O2 Sensor - bank 1 running lean

you should have three oxygen sensors on your car, one for each bank of three cylinders; should be towards the Y pipe on each exhaust manifold. Additionally you should have one on the exhaust pipe before the cadilitic converter.

Posted on Nov 20, 2008

ewashmidas
  • 362 Answers

SOURCE: PO171 error code System too lean bank 1

Here are some possible causes, I would start with anything related to replacing the intake.

Air leaks in intake manifold, exhaust pipes or exhaust manifold
Fuel control sensor is out of calibration
Low fuel pressure (fuel filter clogged, pressure regulator failure)
One or more injectors restricted or pressure regulator has failed
O2 sensors contaminated, deteriorated or has failed
Vacuum hose is disconnected, broken, leaking or loose

Posted on Jan 28, 2009

66 chrgr
  • 1011 Answers

SOURCE: Where is the bank 1 O2 Sensor on the 2001 Olds

it is on the back of the exhaust manifold on the back of the motor by the fire wall

Posted on Mar 04, 2009

YIRMASTER
  • 32 Answers

SOURCE: I have a 2001 Chrysler Sebring LXI Coupe 3.0 mitsu

A great tool to have that can save you some money to read computer error codes and clear them after work has been done can be had for under $100 from Actron. This is what I have been using and its a life saver but it's also good to have the vehicles repair manual as well.

The computer on this car is OBDII like many other vehicles out there these days so you'll need a tool that can plug in and read the outlet located above the shin of your right leg under the dashboard or steering wheel. Here is a link to a bunch of their products on amazon Actron and other OBDII Computer diagnostic code reader tools.

Posted on Jan 11, 2010

  • 1 Answer

SOURCE: My gas gauge on my 2001 oldsmobile silhouette goes

In Canada Canadian Tire sells a fuel additive to put in the tank and fill up with gas (must fill up to cover sensor in tank ) might take two appliciations but it worked in mine

Posted on Apr 21, 2010

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Error code p1040


P0140 BMW P0140 BMW - O2 Sensor Circuit Low Voltage Bank 1 Sensor 2



Possible causes - Faulty Rear Heated Oxygen Sensor Bank 1
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

Replacing the Rear Heated Oxygen Sensor Bank 1 usually takes care of the problem
http://engine-codes.com/p0140_bmw.html

Apr 22, 2014 | 2006 BMW 325i

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

2 Answers

I have a dodge ram 2500 5.9 cummins showing a code of p0140. What's this code


From this website:

http://www.obd-codes.com/p0140

P0140 - 02 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)

What does that mean?

The Powertrain control module (PCM) will provide a .45 volt reference voltage to the Oxygen sensor. When the O2 sensor reaches operating temperature, it will generate a voltage that will vary depending on the oxygen content of the exhaust. Lean exhaust generates a low voltage (less than .45V) and rich exhaust generates a high voltage (greater than .45V). O2 sensors on a specific bank marked as "sensor 2" (as this one is) are used to monitor emissions. A Three-Way Catalyst (TWC) system (catalytic converter) is used to control tailpipe emissions. The PCM uses the signal received from Oxygen sensor 2 (#2 indicates aft of catalytic converter, #1 indicates pre-converter) to read efficiency of TWC. Normally this sensor will switch between high and low voltage at a noticeably slower rate than the front sensor. This is normal. If the signal received from rear (#2) O2 sensor indicates that the voltage has "stuck" between .425V to .474 V, the PCM determines this sensor is inactive and this code will set.

Potential Symptoms

Your check engine light(CEL), or malfuction indicator lamp (MIL) will be illuminated. There will not likely be any noticeable drivability problems other than the MIL. The reason is this: The rear or post catalytic converter Oxygen sensor does not affect fuel deliver(this is an exception on Chryslers). It only MONITORS the efficiency of the catalytic converter. For this reason, you will likely not notice any engine trouble.

Causes

The causes for a P0140 code are fairly few. They could be any of the following:

Shorted heater circuit in O2 sensor. (Usually requires replacement of heater circuit fuse in fuse block also)

Shorted signal circuit in O2 sensor

Melting of harness connector or wiring due to contact with exhaust system

Water intrusion in harness connector or PCM connector

Bad PCM

Possible Solutions

This is a fairly specific problem and shouldn't be too difficult to diagnose.

First, start engine and warm up. Using a scan tool, watch the Bank 1, sensor 2, o2 sensor voltage. Normally the voltage should switch slowly above and below .45 volts. If it does, the problem is likely intermittent. You'll have to wait for the problem to surface before you can accurately diagnose.

However, if it doesn

Apr 15, 2011 | Dodge Pickup Cars & Trucks

1 Answer

O2 sensor replacement


032e2e1.gif

Fig. Showing the locations of the HO2S 1 (Sensor 1) on 3.5L engine

Check this link for DIY Replace O2 Sensor.

Hope helps (remember rated this).

Jul 14, 2010 | 2001 Oldsmobile Silhouette

2 Answers

Po 140 and Po 138 codes for a Nissan pathfinder 2001


Hello! Which O2 sensor did you change? P0138 and P0140 are indicating Bank #1 Sensor #2... Is this the sensor that was changed? If it was, The sensor is reacting to a different fault...A rich condition will contaminate the sensor; It then generates a fault...Actually the O2 fault is an effect not a cause...

Does the engine run OK? Hard starting, stalls or breaks-up when you give it gas. Give me a little back ground...

There is a common fault on 2001 Nissan's that you can check; Lack of a non-resistive ground to the body...

Use an ohm meter set on the X1 scale...#1 read from negative terminal of battery to body...Then from the engine to the body...Both readings should = Zero ohms...If not .......That's the fault


Guru............saailer

May 22, 2010 | 2001 Nissan Pathfinder

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

1 Answer

Engine code P0141 appears on my code reader


O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

Change this O2 sensor. Bank 1 Sensor 2 Hope this helps. Phil

Jan 20, 2009 | 2001 Oldsmobile Silhouette

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