2000 Hyundai Accent Logo
Anonymous Posted on May 03, 2012

I have a 2000 Hyundai Accent 1.5 L, and the check engine light keeps coming on. I have read the codes on OBD II and found that it is P1123 that is the only code that shows up. I have changed both oxygen sensors and still get the check engine light. Is there any way of checking that the oxygen sensors are good or not? The MAF is less than a year old. Is there any way to check for fuel injector leaks? If so how do you do it? Do you have any suggestions on what can be done to rectify this problem? Any help you can give me would be greatly appreciated.

  • Anonymous May 03, 2012

    DO U HAVE ANY EXHAUST LEAKS OR VACUUM LEAKS

  • Anonymous May 09, 2012

    I listened to the advice of fuel injector leaks. So I changed the O-rings on all four injectors. Drove around for a couple of days I have not seen the problem recur. So this seems to of worked for my problem. To change the O-rings is not for a expensive or very time-consuming.

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Anonymous

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  • Master 1,212 Answers
  • Posted on May 03, 2012
Anonymous
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Locate the ruel pressure regulator on the fuel injector rail- pull the vacuum line off it and turn the key to "run" position. You may see a small geyser of gasoline from that hose connection as the fuel line pressurizes. If so- replace the regulator.

Since it is running rich, the only other possible sources for the gasoline getting into the combustion chamber without tripping an error code are leaking injectors and less likely but possible a faulty vapor seperator which would lead to a saturated carbon canister.
If the car has more than 75,000 miles or 100,000km, the injectors are due for replacement anyway.

5 Related Answers

ghost45

PAUL MC G

  • 1280 Answers
  • Posted on Oct 04, 2009

SOURCE: I have a 2000 hyundai Sonata, 6 cylinder eng. My

The sensor is located on the left hand rear side of the block (near the bell housing). It is held in place by a 10mm bolt. It's to the right of the exhaust manifold (LH - radiator side) on the V6. Once you purchase the new sensor you'll be able to identify it on the engine. The connector to this sensor is located in the illustration.
2cb09a4.jpg A word to the wise... replace the O2 snsr as well.

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Marvin

  • 85242 Answers
  • Posted on Dec 11, 2008

SOURCE: Service Engine soon light Code P0133

In most cases this means the O2 sensor is defective.

Anonymous

  • 299 Answers
  • Posted on Jun 17, 2009

SOURCE: Replaced 0xygen sensor in 2003 Hyundai Accent 3 Times Not Fixed!

It sounds like you have either a lean or rich condition ocurring,could be exuast leak,vac leak,leaking fuel preasure regulator,cat convertor.At this point would go to dealer for diagnosis.

ghost45

PAUL MC G

  • 1280 Answers
  • Posted on Oct 04, 2009

SOURCE: 2002 Hyundai Accent 1.6 Check engine code

Take/Tow your vehicle to an authorized Hyundai dealership and pay the diagnostic fee... they will tell you exactly what the problem is and the cost of parts/labor to fix it... at least this way you'll know what the problem is and what's required to fix it.Go to www.hmaservice.com and register( Vehicle by VIN). Afterward, you have access to shop manuals, service bulletins, wiring diagrams, etc. about your vehicle.

Anonymous

  • 1 Answer
  • Posted on Mar 26, 2011

SOURCE: 2003 hyundai accent 1.6L is slow to fuel up. Then

The vapor tube is plugged with charcoal pellets from the cannister it is connected to. There are 2 clips you simply pinch on to release. Careful when you pull off the hose they will come out quickly. Crawl under the car just behind left rear wheel you will see a black box and on the right side is a small hose that is the vapor tube. I just emptied mine of all the charcoal pellets and it fills properly. I also put a small screen at the end of the hose as it goes into the box to prevent more debris from getting in. Please do not pay big bucks to fix this it is simple to remedy.

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Go to www.hmaservice.com and register your vehicle by VIN #..
you'll then have access to wiring diagrams, shop manuals,
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Table 1: Using the Hi-Scan Pro in the Hyundai Diagnostic Menus Current Data Screen TPS (%) 0
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3000
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WITH MANUAL TRANSMISSION


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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
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