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171 error code - 2002 Cadillac Eldorado

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Exclamation marks is red on dashboard, diagnosis shows code 171 and 174


P0171 System too Lean (Bank 1)
P0174 System too Lean (Bank 2)
So why does another fault light come up when brake pedal pressed ,Try reading the codes again with a diagnostic tester that has the relevant codes built into the machine and not a micky mouse device

Nov 29, 2013 | 1999 Ford Ranger SuperCab

1 Answer

Error code P 171 and P 174 and P0443


Type: OBD PO 171 --for the code discription,
cause & solutions

OBD PO 174
OBD PO 443

Sep 16, 2013 | Ford Windstar Cars & Trucks

1 Answer

How to fix error codes p0171 and p0232


Code 171 is for the fuel mixture on bank one is too lean, and code 232 is for a problem with the fuel pump circuit.
Code 232 could cause code 171 or 171 could be something going on with one of the O2 sensors.
You would need to take a scanner and watch the activity on the O2 sensors, and check base fuel pressure with a gauge.

Apr 07, 2013 | Ford Five Hundred Cars & Trucks

1 Answer

Just replace egr valve and dfpe valve as well as cleaning throttle body to try and remove 401 error code now the engine idles faster and 171 and 174 codes are showing up any ideas thanks g.


171/174 too much oxygen in the exhaust, sounds like you may have a vacuum leak after the Mass Air Flow sensor (MAF). Check for leaks in the intake system. Also the MAF sensor could be dirty, clean with electrical cleaner and make sure that it is completely dry before hooking it back up and testing it. Hope this helps, let me know.

Aug 23, 2010 | Ford F-150 Cars & Trucks

1 Answer

200 lincoln ls 3.9 codes 171 174 300


171 and 174 mean it is running lean and 300 means a random cylinder misfire

May 24, 2010 | 2000 Lincoln LS

1 Answer

98 chevy lumina. Code 113, 102, 171. runs then


the code 113 is intake air temp cicuit, high input.
the code 102 is mass air flow volume air flow circuit, low input.
the code 171 is system too lean (bank 1)
I sure hope this helps you out. Dont sound like anything too major though

Sep 23, 2009 | Chevrolet Lumina Cars & Trucks

1 Answer

Po171 error code


P0171 means the system is lean on cylinder bank number one, with just the one code you could replace the bank one upstream O2 sensor and that will most likely cure the problem.

Aug 27, 2009 | 1999 Chevrolet Cavalier

1 Answer

I have a bmw e46 316i 1999 105hp and my problem is whit an error code 171.i can't solve it.what does it mean.please help!


171; check, fuel supply system short circuit to b+

check positive (b+) connections in fuel rails, fuel pumps, fuel injectors, etc....

Feb 20, 2009 | 2004 BMW 7 Series

1 Answer

E46 bmw 318i


171 check, fuel supply system short circuit to b+

Jul 20, 2008 | 2004 BMW 7 Series

1 Answer

How to fix error code po171


i strongly believe it is your fuel pump

Jul 01, 2008 | 2003 GMC Sonoma Extended Cab

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