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P0171 & P0174 codes Landrover Freelander HSE - I already have a new vacuum boot with new air hoses - I cant find any air leaks, but I suspect the maf sensor - visually the sensor looks clean. How many ohms should the maf sensor show? what range? on & off the car? the car idles and runs well, except it seems like it is missing a little bit of power and the engine light is on with the codes.

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6ya6ya
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Posted on Jan 02, 2017

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

SOURCE: 1999 ford taurus emission reading p0171 and p0174

just tune up ur car periodicly, clean filter. clean ur sparkplug.

Posted on Jan 16, 2009

  • 1 Answer

SOURCE: what is the marking for the timing belt setting for freelander landrover 2002

timing info on a 2002 landrover freelander v-6

Posted on Aug 28, 2009

pumpkinman
  • 1144 Answers

SOURCE: Low Fuel Pressure on Landrover Freelander TD4

causes .bad filter,gas line leak,tank leak call dealer to find aux pump.bad gas.i had a truck i replaced the in tank fuelpump 5 times one week they were all bad. could be as simple as your gas cap? any check engine lights on?

Posted on Oct 07, 2009

roniecon
  • 6826 Answers

SOURCE: what do these trouble codes mean p0171 and p0174

po171 is system too lean,bank 1,po174,is system too lean,bank 2,It sounds like a fuel pressure problem.

Posted on Jan 05, 2010

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Code p0171 and p0174


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P0171 & P0174 are lean codes.this can be cause by a vacuum leak. One of the symptoms is a ruff idle when cold.

You can listen for it or you can have it smoke checked by a shop. Most common causes are intake plenum gaskets and rotted PVC hoses.

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2004 x-type 3.0 v6 152,000 miles showed codes P0171, P0174, P2096, P2098, P0101, P0171 pd, P1000.


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Jun 09, 2012 | Cars & Trucks

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My check engine light is on and I get the following three (3) service codes: P0171 P0174 P1000 Please tell me what is the problem!! Al Frazier alfrazier99@yahoo.com


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!

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1999 gmc yukon obd11 codes po101 po171 po174 po429 what could be the causes


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I have a 2003 Range Rover HSE, am getting an ERROR CODE P0171 and P0174. What could this be and how can I fix it?


if its a code that is a lean mixture its probnably the intake gaskets or a vacuum leak.

Apr 30, 2010 | 2003 Land Rover Range Rover

4 Answers

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.

Sep 10, 2009 | 2002 Jaguar X-Type

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P1507 P0171 & P0174 error codes on 02 windstar


p0171 indicates the system is running lean on bank 1,p0174 means the system is running to lean on bank 2 p1507 is an idle speed under run fault i'd suspect an air leak is the cause of your problem check air intake system for airleaks

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