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You can generally clear codes in one of two ways:
1) Disconnecting the battery for a certain amount of time (30 minutes to be safe). This is NOT recommended as it can cause all sorts of problems with your car's electrical components and its computer.
2) Using a code reader scan tool (like the kind they lend free you at most major auto parts store) to read the code and then clear it. When you plug the tool into your vehicle and it reads the code(s), it will give you the option to clear them.
HOWEVER, Neither of these will allow you to pass an emissions test. Most states now rely on your car's OBDI II computer to tell them about your emissions system. If an emmissions related code (ex P0420) has been manually cleared, the computer will show that and you will NOT pass the test.
Oftentimes, a bad emission code can be caused by a faulty oxygen sensor(s) and your actual emissions are still within the legal limits. Unfortunately, it will not matter if, like most states, your state stipulates an OBDI II test. If you live in a state that allows the old fashioned "sniffer" test (actual measuring of the emissions), this may be your best bet to pass. If you do need to get your emissions system worked on, make sure you have the oxygen sensors tested for proper performance before you agree to replace your catalytic converter(s).
What else can I help you with?
How to Clear Check engin light 2000 intrepid?
Have vehicle scanned and codes cleared - usually a problem in the emission control system
What is the problem when the Emission Light is on Chevy Malibu 2001?
Have vehicle scanned--most auto parts stores will do this free--if no problem they can clear codes
Accredited emission test Ontario?
Do you have to licence your vehicle within a certain number of day from the emission test? Sandra
What does the 1991 Honda accord maintenance required indicator mean?
Probably a problem with emission system - have vehicle scanned at auto part store to determine problem or clear codes
How many miles do you have to drive to reset for an emission test on a Chevy impala 2001?
I would drive 20-50 miles to reset the computer. Depends on what kind of emission test you are talking about. Do you mean the emission test for a state inspection?
How do you test code p1491?
To test code P1491, which typically pertains to an issue with the evaporative emission control system, you should start by using an OBD-II scanner to confirm the code and check for related codes. Next, inspect the EVAP system components, including the gas cap, hoses, and valves for leaks or damage. Perform a smoke test to identify any leaks in the system. Finally, clear the code, run the vehicle through a drive cycle, and recheck for any codes to ensure the issue is resolved.
How can you test or erase the trouble codes manually on a 2001 Nissan Quest?
Borrow, rent or buy a good quality OBD2 code scanner. The good ones let you clear the codes. Any codes that WON'T clear are usually caused by a failed component that needs to be replaced.
What is the purpose of a vehicle emission test?
The purpose of a vehicle emission test is to make sure that a vehicle is not emitting harmful toxins into the air. What is tested for varies by state but mainly looks for carbon emission.
Griffith In emission test site colfax St hours?
What hours is the emission test site off Colfax St, Griffith IN open
What does the po mean in the emission codes mean?
Haley Grana.
Does auto zone clear codes?
No.....its against the law to clear codes.
Where is the computer reset button on a 1999 dodge 1500?
This is an OBD2 system. To my knowledge the only possible way to reset the computer is to disconnect the battery. I'm not even sure this wll work. I've never heard of a reset button on these OBD2 systems. If you wanted to clear all the trouble codes then You'll need a handheld scanner tool (available at parts store). I don't recommend clearing the trouble codes until you have repaired the problem. Also once you clear the codes you'll have to drive the vehicle at least 100 miles before you have an emission test.
