Question about 1999 Chevrolet Malibu

1 Answer

Sensor problem... I really need some help here... no one knows the answer...

My check engine light has been on for quite some time now. probably about 6 months. when the light first came on I had the code read and it came up as the o2 sensor. (the one before the cat converter). I changed the sensor and the light went out for a couple weeks. but then it came back and had the same code. I took the car to my regular mechanic and he said that code can be multiple things. he messed around with some wires on the map sensor and once again the light went out for a little bit, but it came back. I'm clueless and everyone else seems to be to. if you have ANY idea what the problem could be please help!

Posted by on

  • kto23o Oct 02, 2008

    I have had the same issue with the O2 sensor. Replaced it twice and code came up again.



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 321 Answers

I would replace the O2 sensor again,and it should be replaced under warranty,as most parts have at least a 1 year warranty.If the exact same code came back again,for the exact same O2 sensor,then the next step in the diagnostic route (every trouble code has a diagnostic route) is to ohms check the wires for that specific sensor between the sensor and PCM (Powertrain Control Module) for continuity.You are looking for any problems with the wires,or the connectors,involved in the circuit.If the sensor checks out,and the wires check out,then the only thing left is a problematic PCM,which might be able to be reflashed so that it is less sensitive,and less prone to set a "check engine" light and diagnostic trouble code.Reflashing is basically just reprogramming the vehicle's engine and trans computer/controller.Good luck,and t/y you for your service to our great nation.

Posted on Jul 16, 2008


1 Suggested Answer

  • 2 Answers

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

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.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Check engine light came on. code is reading fuel sensor what does that mean. and where is it. will it hurt to drive the car

There are a lot of "fuel sensors" in the car, or codes relating to issues with fuel pressure, etc. So your question does not provide enough information to provide a helpful answer. Repost your question and provide the exact code (for example, P0087) in addition to the year, make, model, and engine size of your vehicle.
If the check engine light is not flashing, and the engine is still running normally, it's probably OK to drive for a short time, but be aware that it may quit running at any time. Have it checked out and repaired as soon as you can.

Aug 23, 2017 | Cars & Trucks

1 Answer

How will I know if I need a new sensor?

There are several different sensors in most cars. Some don't really "go out", and some do. To give you a useful answer, we would need to know the make/model/year of your car, and which sensor you were really asking about...
In general, you will see a "check engine" type of light if something that can be replaced goes out.

Oct 14, 2016 | Cars & Trucks

1 Answer

I have Daihatsu Charade 1994 5D Hatch. While drive the car engine goes "off" its self when I stop the car @ traffic lights or slow down the car to take a turn. Anyone help me to solve this problem. any...

This may sound like a really simple answer to your problem, but I'd suggest you check the gas cap. A lot of times when your Charade is moving around the gas load will shift in the tank causing pressure changes which register on the electronic sensors as an engine fault. If you tighten up the gas cap, you restore the fuel system's pressure balance and the light shouldn't go on again. Since the early 1990s, auto fuel systems have to be sealed so that the emissions controls work correctly. If the gas cap is not tightly turned down, the system reads it as a fault and the engine light or check engine light goes off. That should solve your problem. One last note, you don't really say whether there are any other problems occurring like bucking or misfiring. Does this occur at any time? If it does, let me know and I'll find the answer to that problem. If you want more information about cars you might look at where you will find a wide range of information including car repair hints.

Sep 27, 2014 | Cars & Trucks

2 Answers

Which sensor?

I doubt it is a sensor because a faulty sensor would turn on the check engine light. I would look at fuel pressure in case the problem is a weak fuel pump or pump relay.

Jan 27, 2014 | 2003 Chevrolet Monte Carlo

1 Answer

I have a 99 Kia sportage Ex, the dealer said that I need an oxygen sensor. No other shop can pull up the code. What does an oxygen sensor do? How would I know if it is really needed???

Any auto parts store should be able to scan the computer for trouble codes. If the check engine light is not on you probably don't have any stored codes.
The O2 sensor monitors the exhaust gas to find the level of unburned fuel. The computer takes the data from the sensor and adjusts on time for the fuel injectors.

Aug 22, 2012 | Cars & Trucks

1 Answer

Just quit running...start and idel 3-4- sec. then dies. Ive changed fuel filter, plugs and wires, and new fuel pump... does the same thing. My check engine light has been on for some time now. (o2 sensor)...

It definitely sounds like the O2 sensors. See if you can get them replaced and see what happens. Remember that there are 2 O2 sensors; an upper and a lower. The upper one will probably be on the top of the engine where the air flow breather goes into the engine. The lower one will probably be on the bottom of the engine actually on the tailpipe itself close to the firewall. I had to replace my O2 sensors in my car, whenever I would stop at a red light it died. I hope this works, it stinks not having a ride, I know.

Sep 19, 2010 | 1995 Toyota Pickup

1 Answer

Need to know how to check the oxygen sensors on a 1996 saturn sl

Don't know if this will answer it. O2 sensors send info to the computer to make adjustments to the emissions system. Over time the O2 sensors fail which cause the computer to light the "Check engine" light. Originally the "Check engine" light was dedicated to an emission system fault. Now manufactures use it for a variety of abnormalities. To know what the "check engine" light means you have to either take it to a mechanic or buy a OBDII scanner (around $100) and read the code yourself. I like to read my own codes. These scanners are good for all modern cars. Instructions are included EZ to follow.
Long story short, don't worry about it the check engine light will come on when O2 sensor fails. Happy motoring!

Mar 11, 2010 | 1996 Saturn SL

3 Answers

1996 jeep cuts off while driving it and then it usually starts back up. do you know why this happens and what part do i need to replace?

Is the check engine light on? probably is ... A lot of answers to this . If ck engine light take to autozone to get the codes or some where. Autozone does it 4 free...Tune up needed ...replace spark plugs wires..mass air flow sensor..fuel filter...air filter...bad gas..Good luck

Dec 05, 2009 | 1996 Jeep Grand Cherokee

1 Answer

Oxy sensor light on, and also heat is not working. I dont know

Oxygen sensors are located on the exhaust pipe in front and behind the catalytic convertor. There are more than one. If your check engine light is on, the code will tell you which sensor is faulty - I need that code to tell you the exact location.
Also really need to know the engine type to be more specific.
If your heat is not working there is probably a fault in the door mechanism that lets air pass over the heat exchanger under the dash. the switch is most likely at fault.

Jan 07, 2009 | 2002 Ford Windstar Cargo

1 Answer

Check engine light

Without the actual code I'd be guessing. Very unprofessional to me and certainly not fair to you. I can tell you how to fix what's wrong with your car, but I need the actual code or codes.

Dec 28, 2008 | 1995 Pontiac Sunfire

Not finding what you are looking for?
1999 Chevrolet Malibu Logo

80 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

77939 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides