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P2197 Code Rough idle/Stalling

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P2197 Code Rough idle/Stalling

 
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Old 01-22-2019, 10:49 PM
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P2197 Code Rough idle/Stalling

Hoping someone can help. I've put some money into my 2004 F150 5.4 by replacing oil pump, timing chains, cam phasers, plugs and coils.....Its throwing a P2197 code and has a rough idle. Gas mileage is brutal. I just got a OBD reader but am a total newbie with it. Thinking it was an O2 sensor but wondering if i have a vacuum leak somewhere. Any assistance would be appreciated.
 
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Old 01-23-2019, 12:50 AM
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Old 01-23-2019, 02:37 PM
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I checked for a vacuum leak and did not find anything. Ran the scan tool and got the following freeze frame data:

Short term fuel % trim bank 1 0.78125
Long term fuel % trim bank 1 -14.0625
Short term fuel % trim bank 2 57.03125
Long term fuel % bank 2 0%

02 sensor 1 bank 1 voltage .755 v
02 sensor 1 bank 1 short term fuel trim 0.78125 %
02 sensor 2 bank 1 voltage .77 v
02 sensor 2 bank 1 short term fuel trim NaN%
02 sensor 1 bank 2 voltage 0.1 v
02 sensor 1 bank 2 short term fuel trim 57.03125 %
02 sensor 2 bank 2 voltage .83 v
02 sensor 2 bank 2 short term fuel trim NaN%
 
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Old 01-23-2019, 02:52 PM
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https://www.obd-codes.com/faq/fuel-trims.php

In this case, I'd suspect you have a bad sensor or a wiring issue.
 
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Old 01-23-2019, 03:22 PM
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Thanks for the replies. By the looks of things I think I will try and replace the 02 sensor 1 bank 2 as it seems out of whack.
 
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Old 02-02-2019, 12:13 PM
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Replaced the 02 sensor and no change....Cleared the code and it is not setting off anything yet. Next thought is plugged cat's...
 
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Old 02-02-2019, 12:30 PM
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If the cats are plugged, it would be way down on power.
 
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Old 02-10-2019, 06:16 PM
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what are the short term fuel numbers now?
 
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Old 02-17-2019, 04:53 PM
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Took it in and had mechanic look at it....Found the issue was a broken spark plug...Had to really look hard to find the broken plug, wasn't real noticeable. I had replaced them this past summer and it seemed to go well when i did it so not sure if i got the plug already broken or if i busted it installing it (don't believe that I did)
 
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Old 02-17-2019, 09:09 PM
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Glad you got er fixed and thanks for letting us know!
 
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Old 02-21-2019, 05:51 PM
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It seems to be running fine but now i'm getting a P2198 and P2196 code and gas mileage is still brutal.....
 
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Old 02-21-2019, 06:31 PM
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