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P0171 and P0174 codes BMW 530i 2002 e39 engine

Check engine soon light

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 50 Answers

SOURCE: check engine light codes P0174, P0105

P0174, refers to a lean condition of the engine....Possible causes would be a vacuum leak, clogged fuel filter, or a leaking intake gasket( this is the most likely cause because Jaguar has a service bulletin on this very issue). P0105, refers to a MAP sensor malfunction which could also be causing the P0174

Posted on Aug 20, 2008

bschilz
  • 2049 Answers

SOURCE: p0171 and p0174 codes

P0171 System too Lean (Bank 1)
P0174 System too Lean (Bank 2)

If a car has a check engine light on and has P0171 and P0174 codes stored, the most likely cause is a vacuum leak. These codes are set by the car’s computer when it sees too much oxygen in the exhaust. Excessive oxygen readings in the exhaust will set lean codes. This does not mean that the oxygen sensors are defective. It is a common mistake for people to replace oxygen sensors when lean codes are present. Just because the code is related to oxygen sensor readings, it doesn’t mean that the oxygen sensors are bad. If both of these codes are stored this means that both banks of the engine have excessive oxygen in the exhaust. If the oxygen sensors are replaced it’s most likely that the same codes will reappear. It is very uncommon for two oxygen sensors to fail at the same time.

Therefore the most likely cause of P0171 and P0174 codes is a vacuum leak. The source of a vacuum leak can be one of many things. The most common cause of a vacuum leak is a leaky hose. Vacuum hoses over time can become dry and brittle. The rubber deteriorates and can leak causing a vacuum loss. Many times a leaky vacuum hose can be found by listening for a hissing sound. A large vacuum leak can even make the car run rough at idle. In some cases it will not idle without feathering the gas pedal.

Posted on Sep 10, 2009

Mustgo
  • 2359 Answers

SOURCE: Check Enginge Light, Jerky Driving

Good old case of leaky air intake tube.

The air flow meter read the temp and air density to the computer ECU but the leaky air tube (between air flow meter to intake spot on the engine ADD A LOT MOVE air and offset the temp.

So you engine ECU see on set of info and the ACTUAL air density and air temp. are different.

SEAL the tube the best you can.


Vacuum leak can also show the same symptom.

Posted on Jul 16, 2009

iambanshee74
  • 3489 Answers

SOURCE: check engine light codes p0171 and p0174. What do

these are lean codes. 171 is system too lean bank 1 and 174 is system too lean bank 2. what this relates to is you probably have a vacuum leak. look under for signs of obvious breaks in vacuum hoses. this is your most likely culprit. happy holidays

Posted on Dec 30, 2009

  • 14 Answers

SOURCE: My check engine light is

The PO174 & PO171 go hand in hand. There is a lean fuel to air mixture. A disconnected vacuum line or if it has a hole in it. Check all lines make sure they are all connected and are in good condition. Air filter and air passages should not be blocked or dirty. The EGR differential pressure sensor might be bad. If the problem is not enough fuel, the underling cause may be a weak fuel pump, restricted fuel filter, leaky fuel pressure regulator or dirty fuel injectors. Usually a vehicle with 60,000 miles or more.Hope this has helped give you some possible cause to look at. Happy motoring!

Posted on Mar 20, 2011

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2002 bmw check engine light on, diagnostic trouble codes p0174 and p0171.


Google the Codes
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They are Oxygen Sensors-lean on both banks
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BMW e 39 Free Workshop Manual


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2003 ' Bentley Publishers ' English ' ISBN: 083760317X ' Pages 1002 ' File type: PDF ' 44.37mb

This Bentley Manual is the only comprehensive, single source of service information and specifications for BMW 5 Series (E39) cars from 1997-2002. Whether you're a professional technician or a do-it-yourself BMW owner, this manual will help you understand, maintain, and repair every system on 5 Series cars.

BMW 5 Series (E39) Service Manual: 1997, 1998, 1999, 2000, 2001, 2002
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BMW 530I E39 2001 MODEL AUX FAN STAYS ON AFTER ENGINE SWITCHED OFF


If you mean the engine coolant fan, then yes most fans will run until the engine cools down to a specific temp.

Feb 02, 2010 | 2002 BMW 5 Series

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Can I repair airflow meter instead of replacing it


nope - if air mass is faulty then bes buy a new one ... or a tested 2nd hand one

Jan 13, 2010 | 2002 BMW 5 Series

1 Answer

Ford windstar check engine light comes on after stopping when starting to get moving again shows p0171 & p0174 codes why??


P0171 indicates a lean condition. The most common cause of this is a defective mass air flow sensor. Also check if any vacuum leaks. P0174 OBD-II Trouble Code


Technical Description

System Too Lean (Bank 2)


What does that mean?

Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust.

Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.

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Thanks.


Dec 17, 2009 | 2002 Ford Windstar Cargo

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2002 BMW 530i service engine light on


It could be any number of things you will nee the codes read to be sure. If yor mileage is near one of the recommended services points 50,000, 100,000 or 150,000 this could be the cause. Again you won't know or sure ill codes are read Good Luck With This

Jul 09, 2009 | 2002 BMW 5 Series

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