00 impala is getting bad gas mileage could it be thermostat or o2 sensors check engine does not light up?

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are there any other symptoms? have you ever had a tune up done?(plugs, wires) oil,air,fuel filters been changed? check or do some of the above to see if this helps.
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Check engine light diagnostic test indicates bank 2 O2 sensor is slow to respond where is this sensor located?

just a quick note: bank 2 is LEFT side (drivers) on a rear wheeldrive vehicle ,on front wheel drive vehicles it would be the frontside when looking down from the front of the vehicle ,Sensor 2 isafter the cat converter! if you replace that sensor, clear thecodes or have someone clear them for you an (MORE)

If a 98 Honda Civic EX check engine light is on and it is getting very poor gas mileage and stalls frequently what could it be?

Answer . Your problem is most likely a faulty oxygen sensor. Have it serviced. . My car did this last summer, if it is shuddering too, it could be your cylinders. have the wires and plugs changed. it's cheap and could be the source of your problem.. I had this problem for about a year and a ha (MORE)

Would an O2 sensor cause you to go through a lot of gas and make the check engine light come on?

Answer, O2 sensors and gas mileage . \nIt is a very broad answer for why your engine light is on. He is probably right that is on due to the oxygen sensor but as for the gas mileage statement. If you haven't changed your pcv valve, that can kill your mileage as well, but it won't cause your eng (MORE)

Car hesitates check engine light stays steady or blinks when giving gas had a tune up done and replaced bad gas any other ideas of what this could be what's a v-tech sensor?

\n. \n Answer \n. \n. \nBAD FUeL FILTER.\n. \nBAD THROTTLE POSITION SENSOR.\n. \nBAD MAP SENSOR.\n. \nLOOK, GO TO ANY OF YOUR AUTO REPAIR STORES LIKE AUTO ZONE AND HAVE THEM HOOK UP A DIAGNOSTIC READER TO YOUR COMPUTER SYSTEM , NO COST TO YOU, AND SEE WHAT IT READS OUT.\n. \nYOU CAN BUY (MORE)

Where are the o2 sensors located on a 1995 Windstar and which sensor leaves check engine light on?

Answer . \nThey are screwed into the exaust system at various points. Some people say that there are 4 oxygen sensors, but technically,\nthat is not correct. Only the front 2 are considered oxygen sensors. They are screwed into the exaust pipe, one on each bank,\nafter the exaust manifold, but b (MORE)

If the check engine light on a 1991 crx is coming on but you just changed the o2 sensor what else could be the problem?

Answer . I just recently had my Check Engine Light come on in my `91 CRX, so I have stared to find what I need to look into. And the manual seems to say that the light may come on for: (keep in mind this for many modles from `88-`91, So they may not be in the `91 CRX). Oxygen SensorManifold Abs (MORE)

Does a bad O2 sensor cause the check engine light to turn on?

Yes, a bad 02 sensor can cause the cheek engine light to turn on. . It happened to my Honda Accord 96. Autozone OBD states that I have a "Malfunction Oxygen Sensor". I disconnected the negative battery cable and the check engine light went off. Until now it did not came back. It is more than a mon (MORE)

What could cause the check engine light error code for o2 sensors to come back on with same code after all 4 sensors were replaced in my expedition?

Vacuum leak I had this exact thing happen on my 98 Expedition Eddie Bauer. After changing all 4 of my o2 sensors the check engine light came back on. So I performed a complete tuneup while performing the tuneup I fould the vacuum line had been pulled from the PCV valve. I believe the shop my wife t (MORE)

Could the check engine light come on in a 2002 Pontiac grand prix gt due to a bad gas cap?

Answer . That could be one of many possibilites. To know exactly get anOBDII code reader which will run about $150. That will give you theexact code and somewhere to start. If you get a PO440 which is anemissions leak the cheapest place to start is replacing the gascap. And buy a dealer cap not an (MORE)

98 explorer check engine light lit wOBD codes 171 174 that say the airfuel ratio is too far out of spec for the control module to correct it. Could this simply be an O2 sensor gone bad or what?

Yes and no. I have a 99 explorer xlt, I found my thermostat stuck open which would not allow engine to come to operating temp. The o2 sensors only work properly if engine is at operating temp.It also could be the ECT sensor(engine coolant temp).I suggest changing thermostat first then clear code and (MORE)

O2 sensor has caused check engine light to come on - where is this sensor on the 2004 Escape XLT V-6?

If it is the same as an 01 Escape... . I am going through the same thing with my 01 Escape. Come to find out the 01 actually has 3 catalytic converters and 4 (yes I said 4) O2 sensors. It has one before and after 2 of the cats. When I went to Advance Auto they did a OBD II reading from inside my (MORE)

Could a bad battery turn the check engine light?

A bad battery will not turn on a check engine light. A bad alternator however will. Have your vehicle checked and see if the alternator is putting out at least 13.5 volts and if so there may be another issue causing the light .

What are the affects of a bad o2 sensor on your engine?

Answer . A bad O2 sensor could cause the engine to overcompensate for what it believes to be a problem. It will tell the engine to let in more or less O2 and could damage the engine in the long run. The sensor is not too expensive to replace and could save you LOTS of money in the future.

Check engine light is on saying its the o2 sensor what do i do?

You can drive the vehicle. Do not disconnect the battery as this will remove all codes. The problem could be a faulty catalytic converter and the O2 sensor is picking up bad emissions. However, I had that happen and it was the sensor itself that was bad. It could be a loose wire or bad connection du (MORE)

Why are you getting bad gas mileage?

this could be caused by, dragging brakes low tire pressure, dirty fuel filter dirty air filter wrong viscosity oil and last but not least A HEAVY FOOT ON THE GAS PEDAL Bad coolant Temp sensor

Will bad O2 sensor affect gas mileage?

A bad O2 sensor can affect gas mileage. It is an emissions sensor,so when it goes bad, it does not reflect emissions performance onthe car, which could cost a lot in gasoline.

Can a check engine light indicate a bad thermostat?

Many vehicles will trigger a check engine code if the engine never reaches its designated operating temperature (Such as if a thermostat was stuck open). However, there are hundreds of other reasons a check engine light can come on. Putting in a thermostat solely because the check engine light came (MORE)

Why Check engine light in 2006 impala?

could be a number of things like mass air sensor, cam position sensor, O2 sensor if you have a diagnostic tester plug her in and it will read codes and then erase them and if something comesback theres ur problem or take it in 2 ur dealership if u have extended warrenty. hope this helps

Why would the check engine light still be on after replacing the o2 sensor on a 2000 impala?

What are the codes The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger t (MORE)

Can an O2 sensor be bad with no check engine warning?

Most O2 sensor problems should set a check engine warning; otherwise, the manufacturer would probably be in violation of EPA and CARB regulations. In older cars, with less sensitive on-board diagnostic (OBD) systems, and unheated O2 Sensors, it may be possible for an O2 sensor to become partially c (MORE)

Would a bad thermostat cause check engine light to come on?

It could. The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light t (MORE)