Question about 2001 Toyota Corolla

1 Answer

Check engine light on

Check engine light is on. there is a code that reads p0171. what does it means?

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

Sounds like you need a mass air flow meter (on top the airbox). Take the meter out and make sure it is fairly clean, if so, 9 times out of 10 it will need an air flow meter.

Posted on Dec 31, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Code P0171


P0171 - System Too Lean Bank 1 Share
1 ' Add Comment Possible causes
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
What does this mean? Tech notes
If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.
What does this mean? When is the code detected?
- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
P0171 Description
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the Malfunction Indicator Light (MIL) (2 trip detection logic).
Read more: http://www.autocodes.com/p0171.html#ixzz3t65yA9xI

Dec 01, 2015 | 2004 Nissan Titan

Tip

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

Error code 01710 car stalls and will not start for a few minutes


Hyundai has P0171 and P0170 codes. What does this mean??...and took it to Autozone to run a check engine light test on it. The codes that came back were P0171 and P0170? The possible problems were system too lean, fuel syst fault, ignition syt fault, en...


p0171 and p0174 both banks lean

Feb 27, 2011 | 2001 Hyundai Santa Fe

3 Answers

My check engine light is on and I have an error code of p0171 please tell me what is this error code and the resolution I changed all 8 coils and spark plugs and several days later i received and error...


A code P0171 may mean that one or more of the following has happened:
  • The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
  • There could be a vacuum leak downstream of the MAF sensor
P0305 is cylinder 5 misfire (note if u get this code u have a misfire period. might not be able to tell by listening to or looking at engine but it there) ( if you hooked it up to a computer and monitor that cyl you would see the miss )


first thing i would do is test cylinder 5 fuel injector
to do this unplug cylinder 5 injector
then using a multimeter (if don't have one borrow one or buy a cheap one ) check the resistance of the injector should be around 12-15 ohms but very for different motors check one of the other injectors and if cylinder 5 reads close to other injectors it fine but if reads high or low replace it

second check for a vacuum leak
get some carburetor cleaner spray around intake gaskets vacuum lines etc. if idle changes u have vacuum leak there

thirdly clean the mass air flow sensor the make special spray for it which i highly recommend and should be under $5.00 the parts store u can use carburetor cleaner on it but not recommend because the carb cleaner can leave a residue on senor that will destroy it

if all above fails do a compression check on motor if cyl 5 reads lower than all others then there internal damage (bad rings, or burnt value )

Dec 21, 2010 | Ford Expedition Cars & Trucks

1 Answer

2002 vw jetta engine code 1296. what does it mean.




My 2001 Jetta GLS Check engine light is on and I am getting 2 trouble codes P0171 and P1296. What does this mean? My temp gage is also reading nothing at all. 1 more thing I noticed when my low fuel light came on the other day my temp gage began to work but when I filled up with gas the temp gage went to zero again.

P1296 indicates that the car isn't warming up fast enough or at all. Determine if the gauge is faulty by checking the temp of the engine with an infrared thermometer. A healthy engine should operate at 190-200 deg. F fully warmed up. It may be that the gauge is accurate and your engine isn't reaching optimal temp because of a faulty thermostat. It also could be that the engine is actually warm and the gauge is wrong. Use the search feature, we've gone over this one a few times. Also note that P1296 has been mis defined a few times too. P0171 has been discussed here a million times. Check the trouble codes section and the search box.
,,,,, I pulled this off of the OBD home page, It is a close shot for your car, Hope it helps.

Nov 11, 2010 | 2002 Volkswagen Jetta TDI

2 Answers

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 ?

Jan 14, 2010 | 2005 Chevrolet Suburban

1 Answer

Engine service light illuminated. Diagnostic revealed P0171 and P0174 what does that mean?


code P0171 P0174?? sorry these are not nissan codes but the code readers own codes so return to where the reading was done and ask them

Dec 14, 2009 | 2000 Nissan Maxima

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

Not finding what you are looking for?
2001 Toyota Corolla Logo

Related Topics:

140 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

61168 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...