Question about 2000 Buick LeSabre

1 Answer

This is what the auto scanner reads. I was told to replace the camshaft position sensor and the upstream oxygen sensor. I replaced both and my check engine light comes back on. It reads the same thing on the scanner as it did before which i have described in my question above. I have a 2000 Buick Lesabre custom with a 3.8L

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Buick Master
  • 2,984 Answers

I can tell you with certainty that it was not the O2 sensor. They tell you to replace what it shows up and that is not the case when reading these codes. Unfortunately, since it is an electrical component, you cannot return it. Once installed, you have it period.

Now, back to the problem....if you have the same code then there is a really good possiblity that the wires or the connector to the CMP (camshaft position sensor) has a break in it. Either it is melted somewhere in the harness or the connector is faulty.

Only way to know this is to inspect the wires or take the vehicle to the shop for a diagnostic where they can connect to the harness to shoot an electrical signal through it to see if the harness is damaged.

$80-90 right off the bat to find out, unless you have a friend in a garage that has the tester.

Hope this helps!

Posted on Oct 01, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Hello, Need some assistance figuring out what is wrong with our BMW 2003 5.5ii series, in which had the following engine detections:


Is this a v8 engine, or straight six

The upstream o2 sensor for your bank 2 exhaust is not getting proper voltage or any voltage at all. Most likely dead.

Camshaft sensor is getting weird voltages, most likely from the engine underperforming due to the o2 sensor reading.

Misfire is most likely happening because the engines running lean, most likely again from that bad o2.

After that o2 sensors replaced and your running again, you might have to address the running issues of the engine which caused it to go bad in the first place. Which is a lengthly diagnosing process.

Nov 07, 2017 | BMW Cars & Trucks

2 Answers

What means catalyst Efficiency below normal


      Got it scanned and it's P0420: Catalyst efficiency below thresholdbank 1. They said it could be a bad catalytic converter or oxygen sensor. I borrowed a scanner and tried to measure the oxygen sensor readings over time.Sep 8, 2011

      civic - Check Engine code P0420 Catalyst efficiency below ...

      mechanics.stackexchange.com/.../check-engine-code-p0420-catalyst-efficie...
    Feedback

    P0420 Error Code: Catalyst System Efficiency Below ...

    www.obd-codes.com/p0420
    P0420 OBD-II Trouble Code. Technical Description. Catalyst System Efficiency Below Threshold (Bank 1). What does that mean? This diagnostic trouble code ...

    P0420 Code Fix How Its Done Catalyst Efficiency Below ...

    ? 4:25
    https://www.youtube.com/watch?v=-c8090n1Ihs
    Jun 20, 2014 - Uploaded by ACE AUTOS UK
    Here is a tutorial on P0420 code fix catalyst efficiency below threshold How To Diagnose a p0420 code ...

Jan 26, 2016 | Cars & Trucks

1 Answer

Can an O2 oxygen sensor effect another sensor and give a false reading?


Check which side of your engine has cylinder #1. That side is bank 1. Bank 2 is the side opposite of bank 1. So bank 2 is not always passenger side. And since you seem to have extra O2 sensors, I would replace the other upstream and see what happens. Also the mass air sensor can give a trouble code issue to the upstream 02 sensors. Good luck. I've struggled thru this myself.

Mar 06, 2015 | Cars & Trucks

1 Answer

Code p0420 acura m'dx


1996-newer (OBD-II) vehicles use oxygen sensors and a catalytic converter to reduce emissions. There is one O2 (oxygen) sensor in front of the catalytic converter (called upstream), and one behind it (downstream). When the engine is warmed up and running normally the upstream oxygen sensor reading fluctuates and the downstream one is fairly steady. In the case where both readings are fairly steady, a P0420 check engine light code is set.
Possible Causes: Oxygen (O2) sensor not working correctly
Damaged or leaking exhuast (pipe, manifold, catalytic converter)
Damaged catalytic converter
Diagnostic Help:
To diagnose a P0420 trouble code we begin by checking for exhaust leaks under the vehicle. Then use an oscilliscope to check the waveforms of both upstream and downstream O2 sensors. The front reading should vary, the rear should be steady. Replace as necessary. Check the rear Heated O2 Sensor. Check the catalytic converter, replace if necessary. If necessary, check for wiring and component concerns. See our article "Automotive Circuit Testing 101", if you need more assistance with this. Remember to refer to an model-specific repair manual for proper instruction.

Jan 20, 2014 | 2005 Acura MDX

3 Answers

I have a Chevy 2006 Aveo. Two codes came up when the engine check light was put on a scanner. Code P0340 and Code P0133. The check engine light has turned off and on by itself several times in the...


P0340 OBD-II Trouble Code - Camshaft Position Sensor Circuit Malfunction

This indicates that a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem could lie in any part of the circuit - the sensor itself, the wiring, or the PCM. Don't just replace the CPS (camshaft position sensor) and think that will definitely fix it.

Symptoms can include:
* Hard starting or no start
* Rough running / misfiring
* Loss of engine power

Causes: A code P0340 could mean one or more of the following has happened:
* a wire or connector in the circuit could be grounded/shorted/broken
* the camshaft position sensor may have failed
* the PCM may have failed
* there exists an open circuit
* the crankshaft position sensor may have failed

Possible Solutions: With a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
* Visually inspect all the wiring and connectors in the circuit
* Check for continuity in the circuit wiring
* Check the operation (voltage) of the camshaft position sensor
* Replace the camshaft position sensor as required
* Check the crankshaft position circuit as well
* Replace circuit wiring and/or connectors as required
* Diagnose/replace the PCM as required



P0133 OBD-II Trouble Code - Oxygen Sensor Circuit Slow Response (Bank1, Sensor1)

This involves the front oxygen sensor on Bank 1. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.

Symptoms: You will likely not notice any drivability problems, although there may be symptoms.

Causes: A code P0133 may mean that one or more of the following has happened:
* The oxygen sensor is faulty
* The wiring to the sensor is broken / frayed
* There is an exhaust leak

Possible Solutions: The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is more than likely the front Bank 1 oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:
* Check and fix any exhaust leaks
* Check for wiring problems (shorted, frayed wires)
* Check the frequency and amplitude of the oxygen sensor (advanced)
* Check for a deteriorating / contaminated oxygen sensor, replace if necessary
* Check for inlet air leaks
* Check the MAF sensor for proper operation


Hope this helps (remember to rate this answer).

Feb 09, 2011 | 1999 Chevrolet K1500

2 Answers

How do i replace the camshaft position sensor on a 2004 infiniti i35


hi, i have infinity fx 35 2003 it light on the service engine camshaft position sensor bank 1 , i replaced the bank 1 after 3 hour it light on again service engine + VDC off and slip i put the scanner it told me camshaft position sensor bank 1 again what can i do ?

Jul 24, 2010 | 2004 Infiniti I35

1 Answer

2001 Nissan Maxima service engine light stays on code from Auto Zone scanner is PO139 and PO138. What should my next step be to solve this problem.


code p 0138 refers to 2 items
1--heated oxygen sensor(HO2S) 2 bank 1--high voltage ==causes --wiring short to positive --HO2S---ECM
2--oxygen sensor (O2S) 2 bank 1--high voltage ===causes wiring short to positive ---ECM
code p 0139 refers to 2 items
1--- heated oxygen sensor (HO2S) 2 bank 1--slow response ===causes --heating inoperative --wiring--ECM
2--oxygen sensor (o2S) 2 bank 1 slow response ===causes --wiring --- O2S

heated oxygen sensors9HO2S) are in the exhaust manifold before the cat converter
Oxygen sensors (O2S) are after the cat converter
it is indicated that the HO2S is faulty-
check the wiring and /or replace both sensors

Nov 16, 2017 | 2001 Nissan Maxima

1 Answer

I need to replace my oxygen sensor in my vehicle. I'd like to know how many there are and where they are located.


Most cars have at least 2 oxygen sensors, one before the catalytic converter, one after on the exhaust, and sometimes repeated if a V engine so then you would have 4. The OBD code if you get them read (can be done at an auto parts store) will tell you something like "sensor 1, bank 2" That would be the upstream sensor(sensor 1), on the exhaust side NOT containing the #1 cylinder(bank 2). But check the codes as a starting point so you are not replacing all of the sensors. The sensors are easy to replace, if you can get to it easily. Also, the sensor that usually goes bad is one of the upstream sensors, which is also the one your computer adjust fuel/air mix with. They are sold at any auto parts store.


Benjamin

Apr 26, 2009 | 1998 Chevrolet Camaro

2 Answers

2002 saturn sl1 camshaft position sensor


I hate to tell you this, but there is not Camshaft Position Sensor on any 1.9L Single or Dual OHC. I assume you had someone read a Diagnostic Trouble Code from your PCM. They probably told you that you needed a Camshaft Position Sensor, and then offered to sell you one. I would recommend changing your spark plugs and your plug cables with FACTORY REPLACEMENTS. This will usually make the DTC go away. Aftermarket plugs and wires rarely work well for this engine. If you are looking for a CRANKSHAFT position sensor, look between the engine and transmission on the back side of the transmission. It is also known as the "transmission input speed sensor". More often than not though, your engine will not fire up if the Crank position sensor is not working. Hope this helps.

Aug 24, 2008 | 2002 Saturn Sl

Not finding what you are looking for?
2000 Buick LeSabre Logo

Related Topics:

22 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts

yadayada
yadayada

Level 3 Expert

76848 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Buick Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...