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CODE PO 171 SYSTEM TOO LEAN BANK 1 HOW TO FIX

CODE PO 171 SYSTEM TOO LEAN BANK 1 HOW TO FIX THIS?

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 141 Answers

SOURCE: PO 171

Bank 1 O2 sensor.

Posted on Jan 12, 2009

  • 56 Answers

SOURCE: code po 171 system lean on bank one what would

DTC P0171 and Po174 indicate air/fuel ratio is correcting rich for an overly lean condition. You could have several things causing this 1. fuel system malfuntion 2. EGR system malfunction 3. Air intake vacuum leak 4. Engine oil level to high 5. Incorrect cam timing 6. Restricted air cleaner 7. Faulty PCV system 8. Excessive internal engine wear.
Sorry I could not be more specific. Check for the easy things in this list. Most of the time one of the o2 sensors in bank one has failed and not reading correctly. Same on the 02 Lesabre.

Posted on Mar 01, 2009

  • 7 Answers

SOURCE: where is the fuel filter located?

vacuum leaks. not the fuel filter. your code says,bank 1. look closely for split vacuums or broken. also, intake manifold leaks. good luck

Posted on Apr 14, 2010

jeremieclemo
  • 90 Answers

SOURCE: My 2001 VW Beetle has an error code of PO 171.

most of the time it's an exhaust leak on bank 1 somewhere betwean the motor and first oxygen sensor

Posted on Aug 30, 2010

  • 123 Answers

SOURCE: what is code po 171 bank too lean

bank too lean mean the engine get not enough gas to burn. computer says that because if the gas not enough, u might get the combustion chamber to get overheated and melt the piston down or anything inside it.

Posted on Nov 23, 2010

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1 Answer

Po 171 174 codes


code P0171 is ; system too lean (bank1)
code P0174 is . system too lean (bank 2)

Oct 20, 2013 | Chevrolet Cars & Trucks

1 Answer

2006 xj8 code po 171 engine light is on


Lean report from right side bank #1 oxygen sensor

Replace both sides upstream sensors if over 100,000 miles

They slow down & set a mil lamp

Leave the rear monitors

Dec 02, 2012 | 2001 Jaguar XJ8

1 Answer

PO 171 and PO 174


You did not list a vehicle, so here are the generic codes.
Code 171 is system lean bank one and code 174 is system lean bank two.
The computer is getting a signal from the O2 sensors saying the fuel system is too lean, and the computer can not make it rich.
Possible causes are low fuel pressure, vac leaks, EGR valve problems, and so on.

Jul 27, 2012 | Cars & Trucks

1 Answer

Please tell me what this means,,, po171 band 1 system too lean and po174 band 2 system too lean, thank you, jill


PO 171--is an O2 Sensor Code for a Lean Condition
on Bank 1 (right side exhaust)

PO 174 -- is an O2 Sensor Codes for a Lean Condition
on Bank 2 (left side exhaust)

You gave us no vehicle
You gave us no drivability issues or
vehicle history,nothing

If the O2's have 100,000 miles on them,change the (2)
closest to the engine. They are most likely worn out
& the switching times are too slow to control injector
pulse width & thus set a MIL Lamp (OBD2 Fault ) on
your dash

You can learn a lot on the internet if you put OBD2 in your
Search Engine (Internet Explorer,etc)

Jul 15, 2011 | Lincoln Town Car Cars & Trucks

2 Answers

Error codes po 134 po 153 po 154 po 155 po 171 po 174


PO 134 = 02 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SENSOR1)
PO 153 =02 SENSOR CIRCUIT SLOW RESPONSE (BANK 2 SENSOR 1)
PO 154 =02 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 2 SENSOR 1)
PO 155= 02 SENSOR HEATER CIRCUIT MALFUNCTION (BANK 2 SENSOR 1)
PO 171= SYSTEM TOO LEAN (BANK 1)
PO 174= SYSTEM TOO LEAN (BANK 2)
I WOULD SAY YOU HAVE FAULTY OXYGEN SENSORS CAUSING THE ENGINE TO RUN TOO LEAN REPLACE THEM AND YOU SHOULD BE BACK IN BUISNESS

Feb 23, 2011 | 2004 Suzuki Grand Vitara

2 Answers

Code 171 and engine light is on


--BANK 1 = DTCs P0171 (lean) and P0172 (rich)

-Check intake air system for leaks, obstructions and damage.
-Check air cleaner element, air cleaner housing for blockage.
-Verify integrity of the PCV system.
-Check for vacuum leaks.

I would try cleaning the Mass Airflow Sensor first. A dirty Mass Airflow Sensor is a common problem for triggering PO 171 & 174 codes.

Good luck and keep me posted.

Oct 21, 2009 | Chevrolet Colorado Cars & Trucks

1 Answer

Emission system codes


P0421 - Warm Up Catalyst Efficiency Below Threshold (Bank 1)
P0171 - Fuel System Too Lean - (Bank 1)
P0446 - Canister Close Valve Malfunction
P1191/P1193 - Limp Home Valve - Low RPM
Before replacing the catalytic converter (bank 1 next to the firewall, Bank 2 is near the radiator), you'll want to verify it is bad (most likely is it sinse you also have a 'lean' code for Bank 1 - probably clogged). This can also cause misfires and engine stumble (low RPM) that's probably where the 1191/1193 occurred. The final DTC, P0446 - Canister Close Valve Malfunction, could be the valve itself, or the wiring between it and the PCM. Check the connector & pins for any damage/corrosion.
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Hope this helps

Mar 30, 2009 | 2001 Hyundai XG300

1 Answer

PO 171


Bank 1 O2 sensor.

Jan 12, 2009 | 2008 Pontiac Grand Prix

1 Answer

Codes #171 & 174


first check out for o2 sensor if its faulty this can show up.but if its proper.Evaporative emission control system leak very small 171 System too lean (bank 1) 174 System too lean (bank 2) 

Jan 05, 2009 | 2004 Ford F150

2 Answers

My 97 buick stalls some time and wont start for while


remove maf sensor and check for air filter debris on it, gently blow off debris taking care not to damamge the wires on the sensor. also check forvaccum leaks as this can cause a lean condition

Nov 28, 2008 | 1997 Buick LeSabre

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