Question about 2000 Hyundai Accent

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Engine Fault code

Have 2000 Hyundai Accent with an engine fault code P9811

Replaced Mass air flow sensor, and engine ran much better.

Light came on again after two days but engine still runs good.

What else?

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Take the warning light bulb out or stick a bit of black tape over it

Posted on Nov 05, 2008

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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

Check engine lght on and 2 codes p0103 and p0112


P0103 HYUNDAI - Mass or Volume Air Flow Circuit High InputPossible causes- Dirty mass air flow sensor
- Dirty mass air filter
- Mass air flow sensor harness is open or shorted
- Mass air flow sensor electrical circuit poor connection
- Intake air leaks
- Faulty mass air flow sensor
Tech notesBefore 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.
P0112 HYUNDAI - Intake Air Temperature Sensor 1 Circuit Low InputPossible causes- Dirty air filter
- Intake air temperature (IAT) sensor harness is open or shorted
- Intake air temperature (IAT) sensor electrical circuit poor connection
- Faulty intake air temperature sensor
When is the code detected?An excessively low voltage from the sensor is sent to ECM.

Jun 08, 2012 | 2001 Hyundai Accent

1 Answer

Service engine light code po171-system too lean. recently replaced 02 sensor and tjrottle position sensor. any guess


unfotunately every time i ran into this fault on these cars it turned out to be a faulty mass air flow sensor.thet always test to spec. but you replace it and problem solved.their pricey though about 500.00 from nissan.ive encountered numerous problems with less expensive aftermarket and remanufactured ones.maybe buy a used one?

Feb 21, 2011 | 2000 Nissan Sentra

1 Answer

I have fitted a new air mass metter and the engine light is still on allso the engine is slighly miss fireing shood I have done some thing else


Hi did you change the sensor or the air mass meter? try cleaning the sensor with carb cleaner! it sounds like the one you have fitted is faulty.
very common fault on this car

Regards
Dan

Feb 21, 2010 | 2001 Hyundai Accent

1 Answer

Check engin light stays on. Starts fine runs


Most common cause of engine lights is either an air fault such as air flow meter or air mass sensor. there are others but if the car is driving fine then most likely an air fault.

Check the air sensor sometimes they just need a clean up rather than replacement.
Let me know if you need more info.

Regards

Dan

Feb 01, 2010 | 2000 Dodge Ram 1500 Truck

1 Answer

Hyundai Elantra 2000, engine light code 1128


Code 1128 on a Hyundai is a lean mixture fault
http://www.freeautomechanic.com/diagnostictroblecodes11.html

"lean" means the engine is not getting enough fuel. Or the sensor is indicating a lean mixture.
Causes include...
oxygen sensor or wiring bad- located in the exhaust pipe
plugged fuel filter- located in the fuel line, specific location varies by car
MAF sensor or wiring bad (Mass Air Flow).- located in the air intake
low fuel pressure due to failing fuel pump or failing pressure regulator.
leaks in the intake manifold
leaking or disconnected vacuum lines



Jan 08, 2010 | Hyundai Elantra Cars & Trucks

2 Answers

MAP sensor output voltage too low?


poor start, very poor gas millage

Jul 31, 2009 | 1993 Mitsubishi Mirage

1 Answer

Check engine light


The trouble code P1128 is for a faulty mass air flow sensor or MAP. This is a common problem with 1999-2000 Accents. There is air leakage within the unit and/or the hot wire in the unit is badly contaminated. A bad MAP will cause the vehicle to bog and loose power.

Apr 01, 2009 | 1999 Hyundai Accent

1 Answer

06' Ford Explorer engine light wont go off after repair


Yes, that sounds correct to be calibrated.and probably is what is causing your problem. Mass air flow sensors hardly ever go bad. They get dirty and set a code. Garages will try to sell you one when you can clean it with a throttle body cleaner. If you have your old one, clean it and put it back on, try it to see if it works better.

Jan 07, 2009 | 2006 Ford Explorer Sport Trac

1 Answer

I have a 2000 model auto Hyundai accent, it has been not wanting to accelerate intermittenlty, is worse hwne car has been running for a while in traffic. We have found the error code as P1123, can you...


obdII P1123 is a error refer to Air/fuel controller
OBDII P1123 Fuel Trim Additive, System Too Rich


the obdII P1123 is a error refer to Air/fuel controller


OBDII P1123 Fuel Trim Additive, System Too Rich

the following info is a copy/paste of HMA service:


PRIMARY COMPONENT:

Air/Fuel Control System

SECONDARY SENSOR(S):

Mass Air Flow (MAF) Sensor
Throttle Position (TP) Sensor
Intake Air Temperature (IAT) Sensor
Engine Coolant Temperature (ECT) Sensor
Oxygen Sensors

FAILURE CONDITIONS

If the air/fuel mixture at idle is too rich for more than 30 seconds during two back-to-back trips, this code will be set and the Malfunction Indicator Light (MIL) will be turned on.

Details:


The code will be triggered if the following conditions are met:

Long term fuel trim value (additive) is less than -0.75 ms (-15% to -20%) for 30 seconds or more
Engine speed is less than 880 RPM (1000 RPM, 2.0L Tiburon)
Mass air flow rate is less than 6.1 g/s (7.5 g/s, 2.0L Tiburon)
Engine coolant temperature is greater than 158°F (70°C) [176°F (80°C), Accent]
Engine in closed loop operation
No canister purge occurring

Sep 08, 2008 | Hyundai Accent Cars & Trucks

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