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Toyota Corolla Code P0171 Check Engine light


Code P0171 on Toyota Corolla Q: What could cause the code P0171 on 2002 Toyota Corolla? A: The code P0171 reads "System Too Lean (Bank 1)". This means that the air-fuel mixture coming in to the engine is too lean, or there is too much air and too little fuel. This could be caused by a number of reasons, such as bad airflow sensor, vacuum leaks, low fuel pressure, clogged fuel injectors, etc. To know exactly what caused the problem, your mechanic can do a few tests.
From my experience, the airflow sensor problems are fairly common; sometimes the sensor just gets dirty and gives false air flow readings causing lean condition. Again, your mechanic can test it.
If the airflow sensor is causing the lean condition, it will need to be replaced. If the sensor is just dirty, your mechanic may suggest to clean it (cleaning the airflow sensor is very delicate procedure) as a temporary solution - sometimes this could work.

on Dec 07, 2009 | Toyota Corolla Cars & Trucks

1 Answer

Im getting P0171 code- lean .


About 259,000 results (0.64 seconds) Search Results

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    Feb 11, 2014 - 'Check Engine' code P0171 System Too Lean - Is it safe to drive? ... My question is: is it okay to drive my car while it shows these codes? ... This will cause you to get increasingly worse fuel mileage. ... I am going to defer to your expertise, but I just want to ask if you've considered that lean-running engines ...

    P0171 and P0174 - OBD-II Trouble Codes - RepairPal

    repairpal.com > Encyclopedia > OBD II Codes
    Definition of error code P0171 and P0174 - System too Lean (Bank 1 and Bank 2). ...Before we get into the main causes of P0171, let's explore why this code matters. ..."Lean" running cars and light trucks are highly polluting vehicles. Most of ...

    Mazda tribute codes p0171 - Cars & Trucks 'Cars & Trucks

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    Question Product: Cars & Trucks Question Details: Mazda tribute codes p0171 ... I am getting the following (4) codes in a 2003 Mazda Protege5 engine: P0090 ...

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Jan 27, 2016 | Cars & Trucks

1 Answer

Codes po303, po171, po137. po420


2000 Toyota Corolla, P0171 & P0420 codes - YouTube

? 5:43
https://www.youtube.com/watch?v=ahJnJ19-vwY
Jun 13, 2011 - Uploaded by StandardBrandParts
Standard Motor Products presents: Technician's Toolbox "2000Toyota Corolla, P0171 & P0420 codes"

Smoke testing for codes P0171 P0174 - YouTube

? 5:48
https://www.youtube.com/watch?v=kZsqEfP-5zM
Jan 18, 2011 - Uploaded by realfixesrealfast
These two codes mean a V style engine is running lean on both banks. So you have to be thinking - what can ...

How to repair fault code P0171 and reset warning light ...

? 26:31
https://www.youtube.com/watch?v=Y8FBGrCT3rM
Nov 27, 2014 - Uploaded by Peter Finn
How to repair and fix fault or error code P0171 and reset warning light Toyota Corolla VVT-i engine. ... Also how to find fault codeusing OBD scanner. ... Trouble shooting a misfire, Code P0300, P0301, P0302, P0303, P0304, P0305, P0306, ... 2000 Toyota Corolla, P0171 & P0420 codes - Duration: 5:43. by ...


Dec 02, 2015 | 2005 Toyota Corolla

2 Answers

2000 Echo 1.5. What are the probable causes of DTC P0171?


Get it to someone with a suitable diagnostic reader and find out.

Jun 02, 2015 | Toyota Cars & Trucks

1 Answer

2011 Toyota rav4 p0171


code p0171 refers top system too lean, bank 1===causes---intake/exhaust leak--air system---MAF/VAF sensor--fuel pressure/pump--injector/s ----HO2S

Feb 19, 2015 | 2011 Toyota RAV4

1 Answer

Got a P0171 code on 98 camry. what do you suspect?


Here is an explanation to the P0171 code :

http://www.obd-codes.com/p0171

Regards

Sep 14, 2011 | 1998 Toyota Camry

1 Answer

1998 toyota camry , 2 codes, p0171. + p1133


P0171 lean code. Clean the maf sensor. A f sensor is inthe exhaust pipe.

Oct 25, 2009 | 1998 Toyota Camry

1 Answer

Check engine light code P0171 activated on my 2001 toyota corolla


p0171 is lean condition bank one. you could have a vacuum leak a bad map sensor bad maf sensor clogged fuel filter low fuel pressure. start with the vacuum leak first.

May 05, 2009 | 2001 Toyota Corolla

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