Question about Chrysler Concorde

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I keep getting a p0171 and p0175 codes from the scanner (auto x-ray)(meaning i'm lean in bank 1 and too rich in bank 2). fuel injector cleaner didn't help really help. so should i replace the upstream O2 senors or the fuel injectors... any other suggestions would be appreciated. thanks.

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  • Anonymous Mar 30, 2014

    need to know best way to replace oxygen sensor and fuel injectors troubleshooting codes p0175 and p0171 came up at auto zone it describes defective oxygen sensor and injectors. car was cutting off a lot driving and stopping also idling rough.

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  • Chrysler Master
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P0171, p0175 = system too lean (usually related to MAF Sensor) this means that the Air Flow Sensor is telling the computer that much less air is entering the engine than actually is. but first check for vacuum leaks in hoses and also pcv hose. the maf sensor may just need cleaned. any auto parts store will have maf sensor spray, follow directions on can. or you can use electrical spray also. as for the 02 sensors its possible. check or clean maf sensor first.

Posted on Jul 29, 2010

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On a 2007 Dodge Nitro I have codes: P0174 & P0175


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System lean bank 1 p0172 fuel


PO 171 Bank 1 too lean
PO 174 Bank 2 too lean
Why ?
The front O2 Sensors need to be replaced at
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Have to check fuel trim with a scan tool
Have to check fuel pressure
Have to check there are no leaking injectors
Have to check for Vacuum Leaks from the intake
all the way to the exhaust converter
Your working a rich condition keeping in mind the system
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You look at fuel trim short & long,sort of a past history
of events
May want to look at converter temps also
The converters won't last long if you have or has
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Now the spark plugs can't be over 3 years old
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OK, that's a partial list of codes, the fuel delivery is controlled by the oxygen sensors, so it's possible that something in that area could be causing your problem.

However, it could also be clogged fuel injectors that can't deliver enough fuel to the cylinders compared to the air that is pulled into the engine.

Try some fuel injector cleaner for that poured into the gas tank.

How does it run?
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