You have a 1997 Neon light comes on says O2 sensor changed it still comes on same thing car is ldling faster now?

1. Why is my check engine light still on after changing O2 sensor?
2. How do I get my oxygen sensor monitor ready?
3. How do I reset my O2 sensor drive?
4. How long does it take for an O2 sensor to reset?
5. Is there a fuse for oxygen sensor?
6. What does oxygen sensor incomplete mean?
7. What does oxygen sensor not ready mean?
8. How many miles does it take to reset an EVAP system?
9. Do I need to reset after changing O2 sensor?
10. How do you reset your computer after changing O2 sensor?
11. What causes O2 sensor failure?
12. Can an O2 sensor fix itself?
13. Will a bad O2 sensor throw a code?

Why is my check engine light still on after changing O2 sensor?

The O2 sensor is just one out of hundreds of reasons the check engine light will come on. On some engines, the check engine light will turn itself off after the sensor is replaces, however, many require the code to be manually cleared with an ODB2 scanner. You have to use a scan tool and see what the code is.

How do I get my oxygen sensor monitor ready?

Stop and idle for 30 seconds. Then smoothly accelerate to 30 to 40 mph. Repeat the last two steps five times. Toyota: The oxygen sensor monitor should run after idling the engine for nine minutes, then driving at a steady 25 mph for two minutes.

How do I reset my O2 sensor drive?

There is no such thing as resetting an oxygen sensor. Once the problem related to the oxygen sensor code has been properly diagnosed and repaired the car's computer will turn the light off and erase the code. The computer will do this when it sees two consecutive drive cycles with the problem corrected.

How long does it take for an O2 sensor to reset?

Turn the ignition to the on position but do not turn on the engine (it will not start anyway). After five minutes, reinsert the fuse. The lamp of the check engine will blink and then turn off, indicating that your ECU has been restored.

Is there a fuse for oxygen sensor?

yes, there is a fuse for the o2 heaters. check all the fuses. it may also be a harness issue and needs to be checked as well.

What does oxygen sensor incomplete mean?

if the oxygen sensor heater monitor is not ready, check to see how many other monitors are not ready. if the oxygen sensor and catalyst monitors are also not ready, the culprit is most likely a weak battery. if your battery is more than four years old, replace it and re-run the drive cycle.

What does oxygen sensor not ready mean?

A “not ready” result means your vehicle's computer has not had a chance to check all of the parts of the emissions control system for problems – so it cannot determine if everything is working as designed. Until the vehicle is “ready” to complete the checks, the OBD inspection cannot complete.

How many miles does it take to reset an EVAP system?

Here's something you probably don't know: after clearing the car's computer you will need to drive for about 50 to 100 miles. As you drive your car the computer will monitor all the sensors and register the results.

Do I need to reset after changing O2 sensor?

YES!!! You must reset your computer on your car after you've diagnosed the issue causing the engine light to come on. Once you've done that assuming you've done that and changed your O2 sensor you must clear the codes from your engine computer.

How do you reset your computer after changing O2 sensor?

Turn the ignition to the "On" position but don't crank the engine (it won't start anyway). Wait five minutes and reinsert the fuse. The "Check Engine" light will blink, then shut off. This will indicate that your ECU has been reset.

What causes O2 sensor failure?

Why do O2 sensors fail? Since the oxygen sensor is in the exhaust stream, it can become contaminated. Common sources of contamination include an excessively rich fuel mixture condition or oil blow-by in an older engine and engine coolant being burnt in the combustion chamber as a result of an engine gasket leak.

Can an O2 sensor fix itself?

Oxygen sensors are fairly easy to diagnose and replace. Typically, you cannot repair a faulty O2 sensor. It must be replaced because of the technology and materials in its housing.

Will a bad O2 sensor throw a code?

Like other engine sensors, there's no need to replace an O2 sensor as long as it is working properly and accurately reading the oxygen content of the exhaust. ... Such problems may not be bad enough to set a code, but they could have a detrimental effect on engine performance, fuel economy and emissions.