Question about 1997 Chevrolet C/K 3500

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Chevy 1 ton van 5.7 v8

Van started chuging , ran code check comes up 2 codes both oxygen sensors , is there something else that would set off those codes ? or is it normal for both sensors to go bad at the same time

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Both front oxygen sensors can fail at the same time

If you replace the front or upstream sensors at 100,000
miles, if they haven't failed sooner, your doing preventative
maintenance,so add that to the list

After that they slow down & you don't have the proper control
over the fuel trim & your vehicle is not as sharp in response to
your gas pedal request

The chugging is something you need to look into

The O2 Sensors are not causing that,you got things
that need attention,spark plugs,air filter,clean maf sensor
& check out ignition issues,worn out exhaust converter
causing a partially blocked exhaust system

Posted on Mar 19, 2014



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SOURCE: 1997 Chevy 2500 3/4 ton van. What are the symptoms

poor acceleration,bad gas mileage,but on this vehickle the check engine light would come on as it has three oxegen sensors right,left bank,and after converter sensors.if there is a problem the check engine light would be on?

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SOURCE: I have a 2002 chevy tahoe and I just had an oxygen

Sound like either the mechanic didn't plug the sensor in all the way or you got a bad sensor, bank 2 should be the passenger side, sensor 2 is the sensor after the catalytic converter.

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SOURCE: I have a 2002 Chevy

Not the fuel filter

More like a vacuum leak

Posted on Apr 13, 2011

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Check engine light comes on i hooked up my code reader under the steering wheel and it threw this code PO133 any idea's of what it is or how to fix

The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is more than likely the front Bank 1 oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:
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  • Check the frequency and amplitude of the oxygen sensor (advanced)
  • Check for a deteriorating / contaminated oxygen sensor, replace if necessary
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Peter. The dealer did diagnose the problem. They said the car needed all 3 oxygen sensors replaced. They were replaced and the car is now returning codes p0172 and p0175 which are the only 2 codes coming up when the check engine light came on. My question is if the dealer sold me the incorrect oxygen sensors could this cause the computer to incorrectly set the p0172 and p0175 rich fuel mixture codes. There are no other codes coming up. My plan at this point is to check and clean the MAF, check my fuel pressure, and also the TPS but I did not want to waste my time if it could possibly be that the new oxygen sensors where the problem. Any help would be appreciated.

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You might have to test the circuits at the ECM to see if anything is not making the circuit back to it.
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Code P0481 on a 2003 chevy venture can it cause Oxygen Sensors to be off

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2001 Nissan Sentra. Car starts with no power, but after a few restarts, gain power again. Code is PO420.

Hi, P0420 code means a catalytic converter fault.
The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.
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  • Replace the catalytic converter

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What does the oxygen sensors look like in a 2003 Chevy Venture (warner Brothers Edition) ? How many are there? Where are they located? Can you show a picture of them in place? How do i replace them? Chevy...

There should be an O2 sensor before and after the catalytic converter on your vehicle, so it will have 2 sensors. You'll need a 7/8" open end wrench or an O2 sensor socket to replace them.

It'll look something like this:

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