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P 0171 p left bank lean p 0174p right bank lean on f250 2004

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Check for vacuum leaks, especially on intake manifold gaskets. I use carb cleaner or ether to spray around. If engine revs where I spray, there's the leak. If this doesn't solve, please let us know.

Posted on Sep 15, 2010

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Posted on Jan 02, 2017

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Codes 1133 and 0171 is coming up on my GMC JIMMY 1998


DTC P1133 HO2S Insufficient Switching Bank 1 Sensor 1

DTC P0171 Fuel Trim System Lean Bank 1

You have a bad vacuum leak or a fuel delivery problem on bank ! P1133 HO2S BANK 1 SENSOR 1998 Chevy Lumina 3 1

Mar 17, 2017 | GMC Cars & Trucks

1 Answer

Bank 1 system too lean code po171 how to repair


code p 0171 refers to system too lean bank 1===causes --intake/exhaust leak---AIR system---MAF/VAF sensor---fuel pressure/ pump/ pressure regulator---injector/s---heated oxygen sensor (HO2S unit in the exhaust manifold or before the cat converter
If the engine is running well then consider replacing the HO2S unit as that reports to the ECM that then adjusts the mixture for that bank by altering injector amounts and timing
all the rest affect both banks but the code is bank 1 specific

Sep 18, 2016 | Cars & Trucks

1 Answer

What are the probable causes of DTCs P0171 and P0174?


code p 0171 refers to system too lean bank 1===causes --intake /exhaust leak---AIR system---MAF/VAF sensor---fuel pressure/pump---injector/s---HO2S
In this case I would suspect the heated oxygen sensor (HO2S)
then check fro a cracked flex section in the exhaust before the cat converter
code p 0174 refers to system too lean bank 2---causes intake /exhaust leak--fuel pressure/pump---injector/s---AIR system---hose connection/s

Feb 06, 2016 | Cars & Trucks

1 Answer

What is the meaninig of code 0171 0714


Code 171 is the fuel mixture is too lean on bank one which is the side with cylinder one.
Code 714 is a problem with the trans fluid temp sensor circuit.
The O2 sensors for bank one and the temp sensor would need to be tested.

Jan 10, 2013 | 2004 Mercury Mountaineer

1 Answer

Grtting a 0171 system lean bank 1 car runs good


well it could be a few things
vacum leak
mass air flow sensor
crappy gas
bad o2 sensor

Oct 14, 2009 | 1999 Volkswagen Cabrio

1 Answer

Lean bank 1 code 0171 running to lean i change the 02 sensor and maf sensor and check engine light comes back on


Check for a lower intake leak somewhere air is getting in on 1,2,3. Check for leaking vaccum hoses also.

Mar 23, 2009 | 2005 Chevrolet Equinox

3 Answers

Codes 1133-0131-0171-0300


p1133 - o2 sensor, Insufficiant Switching, Bank 1 Sensor 1.
p0131 - o2 sensor circuit, low voltage, bank 1 sensor 1
p0171 - Lean condition, Bank 1
p0300 - Random Misfire

I would be looking at the front passenger side oxygen sensor for issues. It may be bad, it may not be plugged in, bad wiring at harness.

The random misfire may be symptomatic of the o2 sensor problem.

Mar 17, 2009 | 2002 Chevrolet Silverado 1500

1 Answer

My sx 2.0 gave me an error code of p 0171. What does this mean?


Hi there...P0171 code is system too lean bank 1. this could be caused by an oxygen sensor gone bad.

Jan 09, 2009 | 2003 Dodge Neon

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