Question about 2003 Toyota RAV4

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2003 Toyota Rav4 low voltage light is on after changing Mass Air Flow Sensor, alternator, and battery is good as it's 1 year old. Battery was checked and is good. Car is still stalling and voltage light is still on. Took it for free diagnostic at Auto Zone for a second time and code reads Mass Air Flow Sensor. Sensor has been changed. What else could it be?

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Did you have the computer reset after the part was changed? That is what you need to do. It may also take some time for the computer to relearn everything. Was it a bad maf sensor or a probem in th circuit itself? There is a difference. If it was just the sensor and you replaced it, then reset the computer and let it relearn. Make sure your charging fuse and relays are good as well as making sure the ground cables and battery cables have clean connnections and are tight.

Posted on Oct 11, 2010

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1994 Park Avenue. New battery (battery light on) oil light on (oil is fine) car dies when driving at low speeds. Service engine light on but no bad codes are detected when tested.


sounds like you could have a few problems. On the battery light it could be alternator. Test voltage at battery with car running, should be 13-14 volts. Oil light on could be oil level sensor on bottom of oil pan. Dying problem could be mass air flow sensor, coolant temp sensor, idle air valve.

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What is the fuel flow rate for a nissan altima 2001


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2003 Nissan Altima 2.5L Service Engine Soon Light is on, Auto Zone says codes are for MAF and O2 Sensors. Car hard to start after driving a while but when starts appears to run smooth. Auto Zone thi


ok lets start with the codes they say your getting. P??? which 1's and how many. there are few o2 sensors, are they next to the Exhaust next to the converter? MASS AIR FLOW -MAF use this, for now i am guessing, until i see the correct codes your are getting. this could be the 1 you may have below, please read it........
  • P0103
    Mass Air Flow Sensor Circuit High Input
  • Possible causes
  • Faulty mass air flow sensor
    - Intake air leaks
    - Dirty mass air flow sensor
    - Dirty mass air filter
    - Mass air flow sensor harness is open or shorted
    - Mass air flow sensor circuit poor electrical connection
  • Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.
  • possible symptoms Engine Light ON (or Service Engine Soon Warning Light)
    - Engine stall
    - Engine running rough
    - Excessive fuel consumption
    - Excessive smoke
  • the code is generated when An excessively high voltage from the sensor is sent to Engine Control Module (ECM).
2003 NISSAN Altima Sedan OBDII Codes List

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1 Answer

My vehicle cuts out and stalls when stopping and cornering sometimes, it alsoseems to want to cut out when driving occasionally . i have changed the oxygen and air fuel sensors as i did have a engine


If check engine lights is off since replacing air fuel ratio sensors then try cleaning throttle body. If light is on, check for DLCs If same codes , change mass air flow sensor and clear codes and retest

Nov 18, 2013 | 2003 Toyota RAV4

1 Answer

2003 chevy tracker 2.5 v6 maf sensor voltage, ignition on voltage and running voltage? theres 3 wires one positive, two neg.


No the three wires are 1 battery voltage 1 reference voltage 5 volts 1 ground. these sensors read in Hertz so a low reading would indicate a leak in the piping. Low voltage could be due to a dirty sensor computer measures the burn off of the hot wire which has been contaminated by dirt or K & N air filter cleaner. The number one seller of mass air flow sensors.

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1 Answer

My 97 rav4 consume's lot of gas what should i do


Check the condition of the following:

1) Spark plugs, leads and coils
2) Air filter
3) MAF sensor (mass air flow sensor)
4) MAP sensor (manifold air pressure)

Nov 13, 2012 | 1997 Toyota RAV4

1 Answer

CHECK ENGINE LIGHT IS ON WITH 3 CODES


It is the alternator pull out the old one autozone taste it. Pass the test alt good amp volt gives rong volts when you press gass rpm go up3600 volts droop from 14.7 to 10.5 to lowest 8 because alt cylinder is bad 3 codes 1 overall 2 and3 sands low volt codes to the brain you will. Thanks me

Oct 08, 2012 | 2005 Chrysler PT Cruiser

1 Answer

99 Durango battery won't hold charge. After jump


Hi there:
Check the Negative and Positive hook ups from the car. First try to tighten it. It may be loose. If rusted, you can replace them with better ones. The brake light and anti lock will stay on in the process of a charging or battery problem due to anti lock pump failure cause by the low battery voltage. this vehicle has a battery with a dead cell or you have charging system problems, I would take the battery to have it check some ware else, unless you have a very bad short pulling your battery voltage to ground very fast. and we can check that but you need a test light.

If you have access to a dc voltmeter, measure the battery voltage and it should read 13.0 to 16.8 VDC when running. If not your alternator or regulator needs to be replaced. It might have an inline fuse that needs to be replaced.

Now, about shutoff condition, you might want to change the fuel filter, it may have been clogged by sediment picked up from the tank when it was ran low on fuel.

Also, you could have a bad mass air flow sensor or the snorkel from the mass air flow sensor to the throttle body could be ripped. Both are very common and can cause you vehicle to loose power along with many other drive ability issues.

First look for cracks or rips or anywhere air can enter the engine that is not accounted for by the mass air flow sensor. Next comes the Mass Air Flow (MAF) sensor. This is a very important sensor input to the computer. It uses a hot wire sensing element to measure the amount of air entering the engine. The MAF sensor then outputs an analog voltage signal to the PCM proportional to the intake air mass. The PCM calculates the required fuel injector pulse width in order to provide the desired air/fuel ratio. If the sensor is bad than this air/fuel ratio will be off causing severe performance issues. In extreme cases, I have seen these two problems cause a no start condition. This input can also be used in determining transmission Electronic Pressure Control, shift and torque converter clutch scheduling.

Hope this helps; also keep in mind that your feedback is important and I will appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

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1 Answer

2002 Toyota Rav4....check engine light""is


Here are two of the most common causes of the check engine light.

Most common, MAF ( mass air flow ), sensor. A faulty MAF prevents the computer from determining the correct fuel/air mix ratio.

Oxygen sensor. ( front and rear, front meaning before the catalytic converter, rear meaning after the catalitic converter. The front measures the fuel/air mix being sent through the catalitic converter, the back measures the emmisions and lets the computer know if any fuel/air mix ratios need to be adjusted. Both of these can trigger the check engine light.

I hope this helps you.

Feb 02, 2011 | 2002 Toyota RAV4

1 Answer

The car stalls out while driving sometimes,but it will start right back up with problem. Theres no engine light on, or anything else on.


. Check the Mass Air Flow Sensor voltages. Verify good battery voltage to the Mass Air Flow Sensor on the White/Black wire. Verify good grounds for the Mass Air Flow Sensor on the two Black wires - look for 0.05 volts or less to be ok. Check the output voltage from the Mass Air Flow Sensor on the White wire - specification is less than 0.5 volts key on engine off and 1.0 - 1.3 volts at warm idle. The Green/Orange wire at the Mass Air Flow Sensor is not used. The Mass Air Flow Sensor can test good and still be defective.

2. Make sure the timing belt is not off a tooth. Can check ignition timing to see if one bank is on. May need to get into compression on each bank but a timing belt off a tooth or two will idle poorly but can run better at higher RPM.

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