Question about 2005 Chevrolet Equinox
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Posted on Jan 02, 2017
SOURCE: ERROR CODE
it means you have a bod O2 senser the front one as your car has two or three for a v6 but it will be the first one one in the pipe on the front side of a gm product or if your exhaust pipe comes off the back i.e. 2.3 it will be the one in the manifold itself ohh do not forget to check the plug first sometimes an over enthusiastic mechanic unplugs or tampers with these to get you to do more work check the plugs well and wires they are easily fixed
Posted on Jun 14, 2008
the code you speak of relates strictly to the catalytic converter. it is possible there is a faulty sensor, however that choice is highly unlikely. Catalytic converters carry a 5/50 7/70 and 8/80 warranty depending upoin the state you live in...this may be a repair covered under manufacturers warranty. this code is becoming very prevelant in many auto lines as a result of the insurgence of ethanol dilution of our fuels. the "10%" ethanol sticker is located on most pumps. Most vehicles on the road today are not flex fuel capable and this ethanol is wreaking havoc on our fuel and emission systems, especially the catalytic converters. the converters are caked with deposits from the ethanol, reducing its effeciency. if your have access to well worth branded products (not available in ANY parts store, typicaly dealers and repair shops only) try adding on succesive tank loads of fuel their product called Octi-Plus. this products helps remove ethanol products, and very well may save yoiu big $$$ for that converter repair bill...i hope this helps..check out this link....
ps i appreciate your 4 thumbs up if this helps you!
Posted on Jun 19, 2009
SOURCE: check engine light code is
There is not a problem with a sensor there is a problem with the catalytic converter. P0420 sets when the downstream o2 sensor is either reading higher than expected or reading simular to the upstream O2 sensor. Either way it is usually the catalytic converter that is the source of the problem and rarely the downstream O2 sensor.
The Catalytic converter is located in the exhaust system under the car. Catalytic converters from either the dealer or a quality direct fit part from a reputable manufacturer are recommended. Cheap cats lead to lots of problems!
Posted on Feb 13, 2011
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Sep 29, 2015 | 2009 Chevrolet Lumina SS
Catalyst System Bank 1 Low Efficiency
Air leaks at the exhaust manifold or in the exhaust pipesBase engine problems (i.e., high engine oil or coolant usage).Catalytic converter is damaged, contaminated or has failed.Continuous engine misfire conditions, or weak or low coil output.Front HO2S or rear HO2S is contaminated with fuel or moisture.Rear HO2S is loose in the mounting hole (check it for a leak).Front HO2S older (aged) than the rear HO2S (HO2S-12 is lazy).Click here to see.
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Trouble Code: P0420
Catalyst System Low Efficiency (Bank 1)
Air leaks at the exhaust manifold or in the exhaust pipes Base engine problems (i.e., high engine oil or coolant usage.) Catalytic converter is damaged, contaminated or it has failed. Continuous engine misfire conditions, or weak or low coil output. Front HO2S or rear HO2S is contaminated with fuel or moisture. Rear HO2S is loose in the mounting hole (check it for a leak). Front HO2S older (aged) than the rear HO2S (HO2S-12 is lazy) .Here is what is listed in the Saturn repair guide.
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