Question about 1998 Chevrolet Suburban
Currently has about 85K, all 3 o2 sensors have been replaced in the past 2 years, and around 6 months ago the MAF was replaced- supposedly the ecm did not need to be flashed. Now I am getting the 430 code- it stays on for around 60-100 miles and goes off for a few hundred.
does this mean cat has to be replaced? Cost is about $750 from dealer. Will any engine damage occur if I prolong the replacement?
What were the codes??? You should have gotten one code if it was only one O2 sensor that went bad. If all three O 2 sensor went bad you would have gotten three different codes. P0031 (bank1 sensor1) P0051 (bank2 sensor2) P0061 to P0064 O2 sensor after the catalytic. Hops this helps.
Posted on Jul 03, 2009
You def have a catayst problem. Before changing the converter i would recommend changing both up and down stream oxygen sensor on bank 2. If they are old thats what the computer determines if the catalyst is good or not. Most of the time after changing the sensors and resetting the light the problem is solved.
Posted on Aug 26, 2009
Depending on the engine it will have between 4 and 2.
If you had a straight 4 or 6 engine then there would be only 2, one on the exhaust manifold or exhaust pipe and then one just after the catalytic converter.
If you have a "V" engine (V8, V6) then you have an oxygen sensor on each exhaust manifold and will have a catalytic converter for each bank of the V. There will also be an oxygen sensor downstream of each converter as well. In this case there would be 4 oxygen sensors.
Posted on Oct 05, 2009
If all connections are good "dry, tight, no corrosion" then yes. It should be a defective sensor. These sensors are piezo sensors and create a voltage when sensing a knock. A bank refers to a side on a V style engine, 2 refers to the rear sensor on your bank 2. Bank 1 should be the side with cylinder #1 which should be the cylinder closest to you on one of the sides. So your looking for the rear sensor on the opposite side.
Posted on Jun 13, 2010
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I suggest to replace spark plugs before you return back.
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