Question about 1999 Volkswagen Cabrio

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99 vw Cabrio P0171 and P1476

My check engine light is on. so I pull out the code, it was saying
p0171 system too lean (bank 1)
p1476 Manfacurer control auxiliary emission controls

The car is driving fine. Is there a way to fix this? Thank you very much. I appreciate it.

P.S., i just went to jiffylube and had the oil changed about 3 days before this happened. I know my car has a coolant leak at the flange that connects to the engine. I will replaced it this weekend. I don't know if these things have to do with the check engine light or not.

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  • stheimb1962 May 06, 2009

    I have the same issue, but cannot locate where to pull the codes from..can u tell me where the onboard diagnostic is located?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: OBD fault code P0171

vacuum leak

Posted on Jun 26, 2008

ewashmidas
  • 362 Answers

SOURCE: Code P0171

Here are the possible causes for a PO171:

  • Base engine mechanical problem causing a lean A/F condition
  • Check for air leaks in the Air Induction system (e.g., in the intake manifold)
  • Check for air leaks in the exhaust manifold and in the exhaust pipes
  • Check for air leaks in the PCV system and in its related hoses and/or valve
  • Fuel control sensor is out of calibration (e.g., ECT, IAT or MAP)
  • Fuel delivery component fault (clogged filter, low fuel pressure)
  • HO2S has failed (it may be contaminated with fuel, silicone or water)
  • Vacuum hose is disconnected, broken, leaking or loose
Please let me know if this information is helpful. Positive feedback is appreciated. Thank You!

Posted on Mar 20, 2009

jgwhomeequip
  • 1902 Answers

SOURCE: Codes P0171, and P0174 bLean on a 98 Navigator. Any ideas?

O171 MAF (Mass Airflow Sensor) Just try cleaning this part it usually solves that problem without having to buy new part.

0174 Both are mass air flow sensors. The other problem can be a vacuum leak Check PCV valave and all vacuum lines. Also make sure fuel filter and fuel pump are working correctly. You can clean the MAF with some brake cleaner make sure it is dry before you install it back

Posted on May 28, 2009

SOURCE: engine code p0171 right bank running to lean

This sounds like an O2 sensor, there are 4 O2 sensors, 2 for each bank, 2 up stream by the exhaust manifold and 2 down stream by the catalytic converter. However the information you have given is limited, the explanation for the code seems to be missing some information. Ex: right bank sensor 1 to lean.

Posted on Sep 02, 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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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

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I have a 2001 Jimmy with "Service Engine Soon"


P0171 System too lean bank 1
P0174 System too lean bank 2

Last time you changed your fuel filter?
Look for any vacuum leaks.

Sep 05, 2011 | 2001 GMC Jimmy

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Engine check light on error code 1 is P0171 system too lean bank 1 error code 2 is P0174 system too lean bank 2


P0171 system too lean bank 1
P0174 system too lean bank 2
links to information on the codes

it means that the O2 sensors in your vehicle detected a lean condition in their respective banks. this could be caused by a dirty MAF (mass air flow) sensor or a vacuum leak downstream from the MAF sensor

sometimes you can clean the MAF with electronics cleaner or brake cleaner but be sure to take it off the vehicle first. be careful not to damage the MAF while spraying the cleaner, and allow it to dry completely before installing it on the vehicle.

May 21, 2011 | 2001 Jaguar S-Type

1 Answer

P0171 and P0174 Left and Right bank lean trouble codes pulled from ECU. Check Engine Light illuminated.


P0171 = system too lean bank 1
P0174 = system too lean bank 2

The fuel/air mixture is too lean for the entire engine. The fuel pump pressure could be too low. The fuel pump pressure regulator could be at fault. There could be an air leak downstream of the MAF sensor. MAF sensor (hot wire type) could be dirty. Check for intake manifold vacuum leaks. The engine coolant temp sensor and/or the intake air temp sensor could be faulty (stuck at full hot mode).

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Have code P0001, P0171, & P0300. Need to know


P0300 Random/Multiple Cylinder Misfire Detected
P0171 System too Lean (Bank 1) - Read Our Article On Oxygen Sensor Codes For Help With This Generic Check Engine Light Code
i could only find the 2 codes for you
try here
www.engine-light-help.com
what kind of shape are your plug wires in ?

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1 Answer

An Engine Light came on the dashboard of my 2003 Ford Windstar.The code came up saying p0171 (Fuel System too lean.(Cylinder bank 1) What does this mean?


P0171=System Too Lean Bank 1,
not cylinder 1,it means the oxygen sensor on the drivers side exhaust was stuck on lean and set a code.
doesn't mean you need to change the oxygen sensor yet,first clear the code and see if it corrected its self.

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CHECK ENGINE CODE P0171


there is only one bank on a pt cruiser and yes it could be a fuel pump or a vacuum leak

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Check engine light on


Generally when these codes appear it is due to insufficient fuel pressure. Test your fuel pump to ensure it is within specs. Have you changed your fuel filter?

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