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2000 mercury cougar code p0174... fuel trim too lean bank 2. and the tach, speedometer, fuel gage sometimes work and sometimes dont and the battery light is lit up in the dash but the battery is new. what can i do?

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6ya6ya
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Posted on Jan 02, 2017

  • 52 Answers

SOURCE: check engine light on

Check out this site as it tells you exactly the problem http://www.obd-codes.com/p0171
Hope this helps

Posted on Jan 15, 2009

  • 1201 Answers

SOURCE: Diagnostic Codes p0171 bank 1, and p0174 bank 2 (too lean)

Those codes are for the oxygen sensors, lean fuel mixture on both banks. Change them, problem with stalling and rough idle should go away.

Posted on Apr 23, 2009

  • 104 Answers

SOURCE: Check Engine Light Problem

Codes that tell you your engine is running lean can be caused by a number of things. First thing to do (and cheapest) is to get some fuel injector cleaner and run it for awhile. Dirty injectors can cause these codes. I recommend lucas brand myself but there are several different cleaners to choose from. The second thing is checking your vacuum lines. If there is a leak it can cause the engine to **** in too much air and cause the codes. Anything beyond that gets into alot of mechanical work and should be done by a certified technician

Posted on Jul 16, 2009

  • 1986 Answers

SOURCE: mazda 6 2003 code p0174 system to lean in bank 2

It means that your MAF Sensor is dirty or faulty, or you may have a vacuum leak downstream of the MAF Sensor in one of the hoses.

In most cases, just cleaning the sensor will fix it. Otherwise you'll have to have all your hoses inspected and or replaced and also a Dirty Fuel filter can cause this code

Posted on Sep 11, 2009

GasparMacari
  • 166 Answers

SOURCE: diagnostic code #'s p0174,p0171

oxygen sensors are telling you that the mixture is too poor on ur sistem need to check its behaviour and see whats causing that lean mixture
hoope this helps

Posted on Nov 10, 2009

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Vehicle CEL is on, various codes


P0300 is a random miss fire , a vacuum leak can cause this as well as low fuel pressure ! weak fuel pump , clogged fuel filter !
DTC P0171: Fuel Trim System Lean Bank 1
DTC P0174: Fuel Trim System Lean Bank 2 These two codes are saying the PCM - engine computer is see a lean condition .
DTC P0191: Fuel Rail Pressure (FRP) Sensor Performance
Circuit/System Description
The fuel pressure sensor is located on the fuel line. The fuel pressure sensor monitors the fuel pressure in the fuel line. The fuel pump flow control module (FPCM) monitors the voltage signal from the fuel pressure sensor.

You don't say what make , model an year vehicle ! These are for GM vehicles , yours could mean something else . Except the first three , those are genaric codes , same for all makes ! So can't say what this codes are P2097, and P2099 ! Can't mean this P2097 - Post Catalyst Fuel Trim System Too Rich Bank 1
P2099 - Post Catalyst Fuel Trim System Too Rich Bank 2

Sep 03, 2016 | Cars & Trucks

1 Answer

What is p0171 p0174?


P0171 Fuel trim bank one condition Lean (If bank one and two codes set together suspect fuel pressure or MAF sensor. Or O2 sensor defective
P0174Fuel trim bank two condition Lean (same as above or Failed H02S21 Heated O2 sensor Bank 2 sensor 1)

May 11, 2014 | 2000 Jeep Grand Cherokee

1 Answer

4 Codes in computer


code p0128 indicates a mechanical fault ( could be the thermostat stuck open)
code p0174 -system too lean -bank2 ===causes --intake /exhaust leak--fuel pressure/pump--injectors--AIR system--hose connection/s
code po171 refers to system too lean bank 1 same as po174 with the HO2S sensor being the culprit. As to all being related . only by way of the o2 sensors
code p0442 is not connected to the first 3 as it is in a different section of the fuel system

Apr 09, 2014 | 2003 Saturn VUE

1 Answer

Engine light on


P0171 ; Fuel Trim System Lean (Bank 1)
P0174; Fuel Trim too Lean (Bank 2)
fuel trim is system to modify injector pulse if system go lean it will go rich when the system is too much lean and is max.rich it code
look for 02 sensor bank 1 and 2 data
hope it helps

Mar 31, 2014 | 2003 Chevrolet Malibu

2 Answers

Obd code system to lean bank 1&2


Lean on Bank 2 means one side of the engine is getting less fuel or too much air. I also own a 4.0L and I work on these models for this code consistantly. Usually if you have a vacuum leak at the pcv valve hose behind the throttle body you will get a lean Bank 1 and 2.
My recommendation in these cases would be to change the PCV valve (helps with your gas milage) and the fuel filter; other than that you will have to be sure the fuel pressure is correct and there is no vacuum leaks on the driver side of the engine. I am 90 percent sure the fuel filter, pcv valve and clearing the codes will correct this issue.

Here I find one TSB...
MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED - SYSTEM LEAN DIAGNOSTIC TROUBLE CODES (DTC'S) - SERVICE TIPS

FORD:
2000 Contour
2000-2002 Escort
2000-2003 Escort ZX2
2000-2004 Crown Victoria, Focus, Mustang, Taurus
2002-2004 Thunderbird
2000-2003 Windstar
2000-2004 Econoline, Excursion, Expedition, Explorer, F-Super Duty, Ranger
2001-2004 Escape
2004 Freestar
2000-2004 F-Series

LINCOLN:
2000-2002 Continental
2000-2004 LS, Town Car, Navigator
2002-2003 Blackwood
2003-2004 Aviator

MERCURY:
2000 Mystique
2000-2002 Cougar
2000-2004 Grand Marquis, Sable, Mountaineer
2004 Monterey

ISSUE: This article is intended to aid in diagnosing DTC's P0171, P0174, P1130, P1131, P1150, P1151, P2195, or P2197 (system lean or lack of HEGO switches) when a vacuum leak is present. HEGO sensors, MAF sensors, and PCM replacements are not an effective repair when a vacuum leak is causing the above DTC's.

ACTION: Perform the following inspections/repairs when the above codes are found in memory. Procedure provides instructions on how to make comparisons of the total fuel corrections (using scan tool or equivalent) at idle and high RPM's to help determine if a vacuum leak is the root cause of the DTC's.

SERVICE PROCEDURE:
NOTE FREEZE FRAME AND ADAPTIVE FUEL VALUES (ASSOCIATED WITH "LONGFT" PID) WILL NOT BE AVAILABLE IF A KAM OR OBDII RESET WAS RECENTLY PERFORMED.

NOTE FREEZE FRAME DATA WILL INDICATE THE ENGINE AND AMBIENT CONDITIONS WHEN THE DTC WAS SET. THESE ARE IMPORTANT BECAUSE THE VACUUM LEAKS MAY OCCUR ONLY WITHIN SPECIFIC TEMPERATURE RANGES AND MUST BE DUPLICATED TO DETECT THE LEAK.

NOTE FUEL TRIMS AT IDLE ARE PARTICULARLY SENSITIVE TO VACUUM LEAKS SINCE THE UN-METERED AIR LEAKAGE FLOW IS A HIGHER PERCENTAGE OF TOTAL AIRFLOW AT IDLE THAN AT PART THROTTLE. THE BAROMETRIC PRESSURE (BP) PID IS NOT RECOMMENDED TO VIEW WHEN DIAGNOSING A VACUUM LEAK. BP IS AN INFERRED PID CALCULATED DURING HIGHER ENGINE LOADS.

Jan 20, 2012 | 1996 Ford Explorer

1 Answer

How to fix a 2000 mercury cougar with a cumputer code reading fuel trim too lean (bank2)


POSSBLE CAUSES FOR LEAN FUEL TRIM.STOPPED UP FUEL FILTER OR STOPPED UP FUEL INJECTORS.WEAK FAULTY FUEL PUMP.FUEL PRESSURE SHOULD BE 37 - 41 PSI.YOU COULD HAVE AIR LEAKS AFTER THE MAF SENSOR OR LEAKS IN THE PCV SYSTEM.CHECK FOR A EXHAUST LEAK NEAR THE OXYGEN SENSOR.LEAKING EGR VALVE GASKET OR VALVE DIAPHRAGM.MAF SENSOR DIRTY.UPSETTING AIRFLOW CONFUSING THE PCM.

Oct 09, 2010 | 2000 Mercury Cougar

1 Answer

I have got a P0171 & P0174 engine codes on my 2001 mercury sable. What do I do to fix it.


P0171 System Too Lean Bank 1
P0172 System Too Rich Bank 1
P0173 Fuel Trim Bank 2
P0174 System Too Lean Bank 2

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?
Does it miss at all?

Oct 08, 2010 | 2001 Mercury Sable

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

4 Answers

Codes po174/171 cadillac deville northstar engine


Check for vacuum leaks around the intake. This is the most common cause for these codes.

Sep 12, 2008 | 2003 Cadillac Deville

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