Question about 1994 Toyota Camry

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I have 94 camry will not run no check engine light no ground for check engine light from computer no ground to mass air flow we have replaced the brain,distrib,coil,ignitor,all relays no bad or blown fuses I am recieving signal from distribtor but no spark an the fuel pump does not com on until the mass air recieves its ground I need assistance damm nice car just don't run

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Check all ground connections. Battery to motor ground battery to body ground and motor to body grond strap. Take off all fastening bolts to check underneath as they can look fine but be corroded underneath. Ground problems can cause all kinds of electrical malfunctions.

Posted on Jul 29, 2010

Testimonial: "thank you I at least know that you are giving good info grounds are very important I have in fact cleaned all grounds"

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97 park ave ultra is hesitatating when I start using the gas as I start an incline mostly but sometimes just randomly an it's getting worse


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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

Oct 22, 2014 | 2003 Nissan Altima

1 Answer

2000 nissan sentra 2.0 error codes p0101& p0102


P0102 - Mass Air Flow Sensor Circuit Malfunction

The mass air flownissan-maxima-maf-sensor.jpg or MAF sensor is placed in the intake air duct between the air filter and the engine intake manifold. The MAF sensor measures the amount of intake air flow. The MAF sensor converts the air flow measurement into a voltage or frequency signal, with the voltage or frequency changing proportionally to the amount of air flow. The air flow sensor signal is monitored by the engine computer (ECM). The engine computer (ECM) uses the mass air flow signal to know the engine load and to calculate the proper amount of fuel injected. If the signal from the mass air flow sensor is out of expected range, the ECM detects a fault and sets the code P0100. For example, the mass air flow sensor signal could be higher than expected when the engine is not running or lower than expected with the engine running. A car with the code P0100 may have some driveability issues, such as stalling, lack of power, surging, hesitation, etc. In some cars, the code P0100 can cause the fail-safe mode where the engine speed would be limited to 2,500 - 3,000 rpm.
If there are other trouble codes present, they might need to be looked at first. Checking the freeze frame may help, as it may contain some important information. The freeze frame is a snapshot of the engine parameters at the moment when the fault was detected. The freeze-frame may show whether the vehicle was running or stopped, whether the air-fuel ratio was lean or rich, was the engine was cold or warmed up at the time of the malfunction. Read more about the freeze frame.


Read more about mass air flow sensor.

What could cause the code P0100:
- faulty or contaminated mass air flow sensor
- open or short in the mass air flow sensor electrical circuit
- open or short in the sensor power or ground circuit

- other electrical problem with the MAF sensor wiring, (corroded wires, bent terminals, bad ground connection, burned fuse, etc.
- vacuum leaks
- restricted air flow at or before the air filter
- wrong air flow sensor installed
- problem with ECM





P0102 - Mass Air Flow Sensor Circuit Low

The mass air flow or MAF sensor measures the amount of air entering the engine. The engine computer (ECM) uses the mass air flow signal to calculate the amount of fuel injected (read more how the MAF sensor works below). The code P0102 is set when the signal from the mass air flow sensor is lower than expected. Often a car may exhibit some driveability symptoms, such as lack of power, surging, hesitation on acceleration, hard starting, pinging (detonation), or rough idle when started cold. Often the codes P0171 or P0174 could also be stored along with the code P0102, as the incorrect air flow signal can cause the engine to run lean. The codes P0171 and P0174 indicate a lean condition. Checking the freeze frame might help in the diagnostic process. The freeze frame is stored in the ECM along with the trouble code. The freeze frame contains some recorded parameters (e.g. vehicle speed, engine temperature, fuel trim) at the moment when the fault was detected. The freeze frame can also be accessed with a scan tool.



What could cause the code P0102
- faulty or contaminated mass airflow sensor
- debris blocking the air flow at the mass air flow sensor
- unmetered air leaking past the MAF sensor (vacuum leaks)
- PCV system vacuum leaks
- restricted or collapsed intake air duct
- dirty or restricted air filter
- restricted air screen before the air filter
- improper application of aftermarket components (e.g. cold intake, modified air filter, etc.)
- wrong air flow sensor installed
- electrical problem with the MAF sensor wiring, connector, power supply or ground.
- problem with ECM
- in some cases other issues with the fuel injection system like a clogged catalytic converter or a faulty manifold absolute pressure sensor (MAP) can also cause the code P0102.




Solution for MAF repair

Oct 20, 2012 | 2006 Kia Sorento

1 Answer

Does my 94 lhs have a mass air sensor


Yes, all cars that have fuel injection have a mass air flow sensor. The vehicle's computer uses the readings from the MAF sensor to tell the injection system when to fuel the engine, and how much fuel the engine needs to have the correct air to fuel mixture to run properly.

Mar 12, 2011 | 1994 Chrysler LHS

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.

Nov 22, 2009 | 1995 Nissan Maxima

1 Answer

Runs rough when cruising at 35-40 mph


try pulling off the air breather hose and look inside at the mass air flow sensor,it looks like a wire with a diode hooked to it incase you didnt know,see if there is any fuzz on it,sometimes the air filter will lose small pieces and the mass air flow sensor catches it.If that doesnt work then you may have a fuel problem,weak pressure,causing the mass air flow sensor to read too much air so it tricks the computer to adjust the issue.

May 20, 2009 | 1998 Ford Expedition

1 Answer

Check engine light


It might but what exactly are the codes. Before you change the Mass air flow sensor, try cleaning it first with a can of mass flow cleaner.
If your running a oil K&N filter, there could be some oil residue on the sensor. Start with that and change the filter or clean it if it's a K&N.
The O2 sensor's could be bad also, you really need the code's to be sure what sensor is giving you the faulty signal.
Good luck and hope this helps.

May 05, 2009 | 2005 Ford Focus

1 Answer

Fuel efficency


check for a split in the air intake tube. the v6 has a mass air flow sensor. if air is entering the engine without being counted by the mass air flow sensor it will cause a rich condition.

Sep 29, 2008 | 1992 Toyota Camry V6

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