Question about 1997 Cadillac DeVille

1 Answer

How engine performance is affected by bad o2 sensor po138

What affect will a sensor po138 have on the running of my engine?

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    Greenhorn:

    A rookie expert who has answered 20 questions on their first day.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Contributor
  • 20 Answers

Hey, The o2 sensor affects the fine tuning of the engine. it is used to tell how well the engine is burning off the fuel in the combustion process. if there is too much oxygen, then it will adjust the air/fuel mixture accordingly and vice versa. If the car runs too lean or to rich you will loose power and possibly damage your engine. It would be a good idea to replace if its faulty.

how engine performance is affected by bad o2 senso - 12_29_2012_11_58_16_pm.jpg

Posted on Dec 29, 2012

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

How do I know my O2 sensors are bad in my 2005 acura tl?


The sensors before the catalytic convertor can affect drivability. If they are failing, a code will set in the PCM and turn on the check engine light.

Jul 04, 2014 | 2005 Acura TL

1 Answer

Impala o2 sensor


1. Reduced fuel economy
2. Increased exhaust emissions
3. Poor engine performance
4. Engine check light appears
5. Engine stalls during idling
6. A rotten egg odour emitting from the exhaust
7. Your engine surges or hesitates
8. Rich mixture

Jun 03, 2013 | Cars & Trucks

1 Answer

Got code Po240


Hi there! Before changing any O2 sensor I would first look for vaccum leaks on the engine. It is not usual for a car that year to have a bad O2 Sensor. Any air that is entering the intake part of the engine without being measured will affect O2 sensor readings.

Mar 26, 2013 | 2005 Toyota Camry XLE

1 Answer

Can the 02 sensor in a 2000 s type affect performance of the alternator


No, The battery can or the drive belt can, or the alternator may be failing. The condition of the bat. cables (how much corrosion) are they really, really clean? But I Have never seen an O2 sensor affect the charging sys. Two different worlds, ALT.= high volts/big AMPS O2= low volts micro amps.

Feb 16, 2013 | Cars & Trucks

1 Answer

Does the speed sensor being bad make the engine run rough?


Yes the speed sensor could affect the cruise control, no it would not have any affect on the engine performance.

Jan 31, 2013 | 2001 Ford Focus

1 Answer

What can i do to solve problem code p0420 on the car.


This code can be a pain... unfortunately P0420 means it could be several things. Depending on how old the car is...
- Check for exhaust leaks in all pipes and exhaust manifold (visual inspection, listen for that ******* noise evident of holes)
- Get an O2 sensor socket, remove the sensors and inspect. Peer inside the catalytic converter from top and bottom, look for clean horizontal honey comb pattern. Should be obvious if pieces are falling out. Look at O2 sensors for corrosion or fading of metal, they only last ~100K. Only the upstream sensor affects how the car drives though, the bottom one just measures how good the cat is doing. Either one can trip the check engine light though.
* Symptoms of driving performance may take awhile to develop, and either a bad sensor or bad cat can cause it to run rich and burn excess fuel. Running long times with a bad upstream sensor can lead to damage on the cat, so do the cheap O2 sensor replacement first.
[My 1998 civic had the light on since I got it in May, finally performance and fuel economy started dropping. Before buying an O2 sensor or new cat, I visually inspected everything and finally took the sensors out to look at them and inside the cat. The cat and bottom sensor looked okay, but the top was corroded (I figured it was the top since my driving was being affected). I replaced the top O2 sensor and she runs nicely now, I expect fuel economy to return. You can clean sensors sometimes (no water), but usually its corroded so just replace it. $70 for a sensor is WAY cheaper than paying someone to replace you cat, which is a recommended change if you end up having to get a new cat anyway (don't want to ruin a new cat with a bad sensor dumping fuel in).

Sep 08, 2012 | 2003 Pontiac Vibe

1 Answer

I have a 2004 mitsubishi eclipse with the cat converter bad how long can i run with it with a bad converter will it ruin my engine anytime that part is too expensive $1000. what can i do


The Catalytic converter is used to reduce the toxicity of emission. I'm pretty sure it will not harm your engine if it is bad, but it will harm the environment. It could possibly also affect performance. Are you sure it is bad? does it make a very loud muffled sound out of the ordinary? It is a long shot but you can try changing the o2 sensor. The o2 sensor is a sensor that measures the pollution and oxygen going through your converter. If it doesn't meet the requirements it will most likely trip the engine light or cause problems as well. If you really have to replace it you can try ebaying the parts needed and then call around and see who can install it.

Mar 01, 2011 | 2004 Mitsubishi Eclipse

1 Answer

When my golf 1.9 tdi been running for awhile if i switch it off them try to restart it it is difficult to restart any idea?


when was the last time you changed your O2 sensors allot of people miss understand these sensors and usually wait until they fail to replace and end up with engine light on.However these are a common switch that is part of a routine tune up maintenance every 50.000kms or so these do affect starting,,cars emissions performance, mileage etc.I have seen these not work properly and not activate engine light so my solution would be O2 sensor Bank 1 sensor 1

Jan 09, 2011 | 2005 Volkswagen Golf

2 Answers

5 error cods on my 2002 Jetta GLS 1.8 Turbo Engine


P0420= Catalyst System Efficiency Below Threshold Bank 1
P0300=Random/Multiple Cylinder Misfire Detected
P0301=Cylinder 1 Misfire Detected
P0172=System Too Rich Bank 1
P2181=Cooling System Performance
you need to write these down,have someone clear the codes in the car,then go for short ride and recheck which if any code reappears.it's like domino's affect,one sensor can start a chain affect with the others.

Dec 09, 2009 | 1998 Volkswagen Jetta

2 Answers

I have a Honda Accord 2003, how can i fix a downstraem Oxygen sensor.. does this affect the gas cosumtion performance.. how can i fix this.. Help.!


o2 sensor is very important part to the engine when it come to the fuel economy. o2 sensor send information to the computer (ECU) which compute and calculate ratio of burnt exhaust gases. if the engine is not run properly either is too lean or too rich the o2 sensor will detect it as the car will triger the check engine light. you can drive the vehicle which will not hurt it as long you can tolerated the light however the car will get terrible gas mileage and poor performance as the ECU will try to lean the engine out itself. o2 sensor is fairly cheap to replace and fix. Let assume the car get 30 mpg on the high way, running with check engine light/bad o2 sensor will change the gas mileage to 18-25 mpg. If the car is V6 make sure you replace o2 on both side. good luck!

Nov 23, 2009 | 2003 Honda Accord

Not finding what you are looking for?
1997 Cadillac DeVille Logo

208 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts

yadayada
yadayada

Level 3 Expert

76109 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8270 Answers

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

Answer questions

Manuals & User Guides

Loading...