2007 S40 P0172..can you help?
#1
2007 S40 P0172..can you help?
It'd come 3 months ago, have erased it with ELM327.
Fine for few months and it's back.
the difference is it's coming back every time I start the car even after I erase it.
No performance drop, but I'm a slow driver so I might be missing it.
My guts telling me the temp under the hood has been hotter than before, but not sure.
Here's the screenshot of ELM327 when idle.
https://ibb.co/mABNPk
Do you see anything strange? how should I fix it?
Fine for few months and it's back.
the difference is it's coming back every time I start the car even after I erase it.
No performance drop, but I'm a slow driver so I might be missing it.
My guts telling me the temp under the hood has been hotter than before, but not sure.
Here's the screenshot of ELM327 when idle.
https://ibb.co/mABNPk
Do you see anything strange? how should I fix it?
Last edited by good1662; 07-21-2017 at 10:22 AM.
#2
Possible causes Faulty front heated oxygen sensor Ignition misfiring Faulty fuel injectors Exhaust gas leaks Incorrect fuel pressure Faulty Mass Air Flow (MAF) sensor
Read more: https://www.engine-codes.com/p0172.html
Does it run smooth or feel like it has a miss?
Read more: https://www.engine-codes.com/p0172.html
Does it run smooth or feel like it has a miss?
#3
Possible causes Faulty front heated oxygen sensor Ignition misfiring Faulty fuel injectors Exhaust gas leaks Incorrect fuel pressure Faulty Mass Air Flow (MAF) sensor
Read more: https://www.engine-codes.com/p0172.html
Does it run smooth or feel like it has a miss?
Read more: https://www.engine-codes.com/p0172.html
Does it run smooth or feel like it has a miss?
#5
the strange thing is it went away by itself.. didn't come back after 2 hours of drive.
the day it popped up was a really hot day.. any clue on reason why?
#6
#7
It'd come 3 months ago, have erased it with ELM327.
Fine for few months and it's back.
the difference is it's coming back every time I start the car even after I erase it.
No performance drop, but I'm a slow driver so I might be missing it.
My guts telling me the temp under the hood has been hotter than before, but not sure.
Here's the screenshot of ELM327 when idle.
https://ibb.co/mABNPk
Do you see anything strange? how should I fix it?
Fine for few months and it's back.
the difference is it's coming back every time I start the car even after I erase it.
No performance drop, but I'm a slow driver so I might be missing it.
My guts telling me the temp under the hood has been hotter than before, but not sure.
Here's the screenshot of ELM327 when idle.
https://ibb.co/mABNPk
Do you see anything strange? how should I fix it?
The most common cause for this problem is a disconnected or cracked vacuum hose causing the computor to command a richer fuel mix to compensate for the lean condition. Right under the intake and hard to get to is a vacuum hose that fails alot, I believe it go's to the PCV system.
HTH,
Last edited by madman77; 07-28-2017 at 08:28 PM. Reason: spelling
#8
decided to clean maf
It'd come 3 months ago, have erased it with ELM327.
Fine for few months and it's back.
the difference is it's coming back every time I start the car even after I erase it.
No performance drop, but I'm a slow driver so I might be missing it.
My guts telling me the temp under the hood has been hotter than before, but not sure.
Here's the screenshot of ELM327 when idle.
https://ibb.co/mABNPk
Do you see anything strange? how should I fix it?
Fine for few months and it's back.
the difference is it's coming back every time I start the car even after I erase it.
No performance drop, but I'm a slow driver so I might be missing it.
My guts telling me the temp under the hood has been hotter than before, but not sure.
Here's the screenshot of ELM327 when idle.
https://ibb.co/mABNPk
Do you see anything strange? how should I fix it?
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NFrank89
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08-26-2011 07:53 PM