Question about 2004 Pontiac Vibe
Understand, unless you mistyped, the Generic OBD2 definition is Bank 1 sensor 3 heater fault.
Your car is a GMish Toyota Matrix. There is nor ever has been a sensor 3 on that engine! So, if its consistently that code, start with a new scantool. Ive had a few older update tools occaisionally give a wrong O2 code on toyo products if the software was between 2006 and 2010 data lists.
Try enhanced as well as generic and they must and should read the same.
If you are in fact getting that code, you have a software issue. If its a different code, you need to know what it is.
Posted on Jan 05, 2015
There is 2 system in O2 sensor one is the sensor itself
and the other one is the heater
the code you have means the heater is not working look for the fuse or find out why heater is not working
don't put any anti seize lubricant on O2 sensor no ground for heater
hope it help
Posted on Jan 05, 2015
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Posted on Jan 02, 2017
Bank 1 is the frt side exhaust manifold (did they say bank 1 sensor 1?),you can start by replacing that sensor,i would check the intake for leaks ,the gm 6cly. are known for bad intake gaskets,you will see oil coming out form the frt or rear of the intake,also check your atifreeze overflow bottle for bronwish sludge,which means that the oil is mixing with the antifreeze.A leaking intake could cause that lean condition.
Posted on Mar 29, 2009
The OBD II code for P0400 is Exhaust Gas Recirculation Flow Malfunction.
I'm sure the only thing you have left is you may have to replace the EGR valve or check for any leak from the vaccum lines going to to EGR valve.
Posted on Jun 01, 2009
There are to many things that can cause the check engine light to come on. Best thing to do is to go to Auto Zone and get the Car ecm scanned for the DTC codes which would indicate the issues to why the check engine light is on. It could be as simple as a bad gas cap and needs to be replaced and if that is the case, make sure your get one from the dealer and not a generic gas cap. It could also be a bad O2 sensor and Auto Zone can give you the step by step instructions to replacing the old O2 sensor with a new on with common tools and they do have that part for sale. Good luck and keep me posted, be glad to answer any more questions you may have.
Posted on Aug 04, 2009
It is probably the sensor before the cat. if it has a heater. The heater circuit going bad is a common problem, it does not affect the way the car runs after it warms up, it is an emission device to heat the O2 sensor up quicker than the hot exhaust gas would. It should be replaced because it will keep your check engine light on and you would not be able to pass an emission test.
Posted on Oct 12, 2009
you need to have the Engine Coolant Temperature switch checked,since the computer relies solely on sensors,the ect tells the computer how cold or hot it is so the computer will make it a rich or lean mixture to start the engine,if it tells the computer that it is 75 degrees the computer will lean the mixture like starting a car in the winter without a choke.
Posted on Feb 07, 2010
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