Question about 1998 Ford Taurus

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Failed smog test because of fault code po174 : system too lean (bank 2) ford taurus 1998

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Coad 174 and171 on ford touras 1998

Posted on Mar 17, 2011

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Leak on the intake, bad EGR valve that's not closing. Perhaps a bad O2 sensor, but probably not. The O2 sensor is what detects a rich/lean condition. But when they fail they usually give their own error codes.

Posted on Feb 05, 2010

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1 Answer

Po171 po174 code


Lean bank 1 and bank 2 , and throttle actuator system fault. Check reason for lean codes 1st, vacuum leak(s), air inlet boot and hoses, or low fuel pressure / clogged filter. Repair as needed then clear codes and recheck .

Jan 09, 2014 | Cars & Trucks

1 Answer

Po171 and po174 codes shows on my scaner.What do the codes mean.


171 - SYSTEM TOO LEAN BANK ONE.
174 - SYSTEM TOO LEAN BANK TWO.

Dec 16, 2010 | 1998 Ford Explorer

1 Answer

Failed OBDII Diagnstic trouble codes P0761 and O1744 What does this mean?


code P0761-
Possible causes - Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid 3 valve
- Shift solenoid 3 valve harness or connectors
- Shift solenoid 3 valve circuit is open or shorted
P0761 FORD Description Shift solenoid valve 3 is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position. When is the code detected? The P0761 code is detected when the ECM has detected a mechanical fault with the solenoid energized, valve stuck off code O1744- is not a code these are the ones I have found that come close
P0174 1999 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 2000 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 2001 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 2002 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 2003 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 FORD Fuel Injection System Too Lean Bank 2

Sep 28, 2010 | 1999 Ford Taurus

1 Answer

Generic code PO171 system 2 lean bank 1 generic


This can be caused by a faulty mass air flow sensor

Jul 06, 2010 | 1999 Ford Taurus

1 Answer

My ford truck failed the smog test because bank 1 and 2 are to lean ( p0171 & p0174 )


possible solutions are, a dirty maf sensor. remove manifold air flow sensor and clean it with maf sensor cleaner. you can buy a can at any auto parts store to clean, take off and clean maf sensor, do not touch inside of sensor it is very fragil. when cleaning sensor be sure it is dry before installing it back on vehicle. also check for a vacuum hose leak downstream of maf sensor.make sure air filter is clean. this usually takes care of the problem. po171 and po174 are the same. you can use electrical cleaner to clean sensor also. also check for a dirty fuel filter and fuel pressure, if needbe.

Feb 11, 2010 | 1998 Ford Taurus

1 Answer

Yes my truck is 1998 ford f 150 4.2 an i have code po174






DTC code p0174 means "System too lean (Bank 1)"

Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exahust). On V6/V8/V10 engines



, Bank 2 is generally the side of the engine that doesn't have cylinder #1.

Jan 09, 2010 | 1999 Ford Windstar

1 Answer

My check engine light is on its saying system too lean code Po174


How many miles are on the car? It could be one of three things.
1. Check vaccum lines running to the valve covers. The rubber nipple that connects to the valve cover sometimes gets a hole.
2. Could be 02 sensor depending if its lean on bank 1 or bank 2.
3. Also check DPFE hose's. Located on back of motor running from EGR valve exhuast tube.

Oct 28, 2009 | 2000 Ford Taurus

1 Answer

Obd code P1131 and PO174


P1131 - Heated Oxygen Sensor (HO2S) Circuit Low Variance Bank 1 Sensor 2
P0174 - Fuel Trim System Lean Bank 2

Clean the MAF sensor and check for vacuum leaks at the intake manfold or the injector O rings.

Nov 13, 2008 | Ford Ranger Cars & Trucks

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