Question about 2002 Chevrolet Impala
To reset it just disconnect the battery negative cable for 5 minutes
Posted on May 05, 2010
Take it to your local auto store and they can check the car computer and tell you why it's on for free. You might need oil in the car. Also check for water leaks from the bad valve cover gasket they used. Look for water leaks in front of the engine also.
Posted on May 11, 2010
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Posted on Jan 02, 2017
YOU NEED TO HAVE SOMEONE READ THE CODES. SOME PARTS HOUSES (ADVANCE AUTO AND AUTO ZONE) WILL DO THIS FREE OF CHARGE. ONCE THEY TELL YOU WHAT THE CODES ARE YOU WILL HAVE TO FIX THAT PROBLEM BEFORE THE LIGHT STAYS OUT. YOU CAN RESET IT BY DISCONNECTING THE BATTERY FOR A COUPLE MINUTES, BUT THE LIGHT WILL KEEP COMING BACK ON UNTIL THE VECHILE IS REPAIRED
Posted on Dec 14, 2008
Bank 1 is the rear O2 sensor, but experience says to change both. The front one is right behind the engine in the middle of the engine compartment. The rear O2 sensor is on the top of the exhaust pipe, just behind the catalytic converter. But the same code that shows it is the O2 sensor (which is P0420), is the same code for the catalytic converter, or a vacuum leak. Make sure if you do change the catalytic converter, ensure that the new one is OBD-2 compliant. And the vacuum leak could possibly come from the manifold gasket. Let me know what the problem was!
Posted on Mar 26, 2009
SOURCE: check engine light on
You cannot reset the check engine light any other way than using a scan tool. Some auto parts stores will scan the vehicle for free then at least you will know the area of the fault.
Posted on May 07, 2009
On most cars you can reset the check engine light by disconnecting the computer from it's power source. Disconnect one of the terminals on your battery. The negative terminal is usually suggested but I've never noticed a difference between the two. When you reconnect it and start it up, the light should be gone until the computer comes across another problem.
Posted on Aug 08, 2009
there are a couple of things, first make sure there are not restriction in the exhaust, i know the dealer has had to replace converters under warranty because of this problem, then theres a reflesh program for the computer due to this problem, and lastly,run with egr off make sure it clean of carbon,carbon gets stuck in pintle sets check eng lightbut carbon then blows by so when you remove egr you see nothing, well start with these good luck.
Posted on Nov 28, 2009
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