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P0432 and P0422

  #1  
Old 12-03-2013, 02:25 PM
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Default code P0432 and P0422 after changing bad coil

Hey, all; I need some help. My 2002 S80 T6 was previously misfiring. Based on this website, I was able to determine that it was a faulty coil on cylinder 6. I replaced the coil and it drives much better now (almost perfectly); however, the Check Engine light is on and is generating codes P0432 and P0422. When I'm coasting at around 50 mph (in top gear), I notice a very slight hesitation if I lightly touch the gas pedal to gradually speed up. It almost feels like the injector may be clogged and I have to give it a decent amount of gas to get good acceleration, but I don't know. Any ideas??

Thanks for your help.
 

Last edited by chuck_ds; 12-03-2013 at 02:35 PM. Reason: Adding more descriptive title
  #2  
Old 12-04-2013, 08:16 AM
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P0422 Main catalyst converter, bank 1 - efficiency below threshold
P0432 ... bank 2...
 
  #3  
Old 12-04-2013, 09:23 AM
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Any idea what the most likely cause is? Is it likely something simple that caused these codes to occur?
 
  #4  
Old 12-05-2013, 04:48 AM
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  #5  
Old 12-05-2013, 08:46 AM
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Thanks; that helps... From the research I've done on the forums, the main possibilities that I've seen are cracked hose, O2 sensor, or air mass meter sensor... I guess I'll try the cheapest route first and look for any cracks in the air intake system, then work from there... I wish I knew for sure... Thanks for your help!!
 
  #6  
Old 12-06-2013, 02:48 AM
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Maybe your bad coil made injector to spray unburned gasoline into catalyst. Don't know what consequences could that made...
 
  #7  
Old 12-06-2013, 08:45 AM
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Yeah, I read some posts that mention that too. I hope that's didn't interfere with anything. I originally thought it was bad gas, so I finished out one tank of gas, then Refueled with another tank of gas (spiked with Lucas fuel system cleaner). I hope that wasn't enough to cause any real or expensive damage. Yesterday, I bought some Mass Air Flow Sensor cleaner to spray on the sensor. I also bought some Sea Foam additive to put in the crank case and fuel line. I figure these are some low-cost troubleshooting options to explore first. Keep your fingers crossed for me.
 
  #8  
Old 12-07-2013, 08:54 AM
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Good luck.
 
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