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Old 10-22-2004, 11:51 AM   #1
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Default Trouble code p1640 and p0171

Had a mishap with the AC compressor clutch over the weekend that left me with a SES lite on. Pulled the codes and got two

P1640 - QDM1 - Failure

P0171 Bank 1 - System too Lean.

Can Anybody Translate these for me????

Thanks

Steve
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Old 10-22-2004, 03:18 PM   #2
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p1640 = Controls low speed fans and something else....don't remember what right off hand.

p0171 = Lean code...just what it says.....test your o2 sensor or replace it per the hayes manual.

You can also look in tech info also for tips and pointers with these codes....pretty common ones around here I think.. I know I've had both, I still have the QDM 1 once in a while.....
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Old 10-22-2004, 03:48 PM   #3
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Quote:
Originally Posted by LakevilleSSEi
p1640 = Controls low speed fans and something else....don't remember what right off hand.

p0171 = Lean code...just what it says.....test your o2 sensor or replace it per the hayes manual.

You can also look in tech info also for tips and pointers with these codes....pretty common ones around here I think.. I know I've had both, I still have the QDM 1 once in a while.....
There'* alot more to lean than an O2 sensor. Let'* assume that it actually MIGHT be lean, and the O2 is reading correctly. Fuel pump, filter, FPR, and injectors are all culprits.
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Old 10-23-2004, 04:06 PM   #4
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Bill is right, P0171 can be a lot of things. In my case I keep getting that code because I have a vacuum leak somewhere. So check all your lines for cracks.
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