Question about 2001 Hyundai Elantra

1 Answer

What does code number P1128 mean when light is on

I have a 01 Hyundai accent automatic that the light is on and the code reader says P1128 what would this stand for. The car seems as if it doesn't shift right away and gets higher rpm as you go, is there a sensor somewhere, any ideas?

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 57 Answers

P1128 - Long Term Fuel Trim Multiplicative System Too Lean.
The ECM will set a code and the MIL will turn on if the long-term fuel trim value goes from 10% to 15% lean for 30 seconds during two driving cycles when the following conditions are met:
1.- Engine loads exceeds 1.8 milliseconds.
2.- Engine coolant temp. is above 158F (70C).
3.- Canister purge system is not operating.
4.- Mass air flow is less than or equal to 5.5grams per second.
5.- Engine speed is below 1000RPM.

Please Rate Me =]

Posted on May 28, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Engin management light stays on


Are You sure those code are correct?

Jan 25, 2014 | 2002 Hyundai Accent

1 Answer

Hyundai error code p1128 lean fuel mixture


Hi there:
DTC P1128 is "Long Term Fuel Trim Too Lean"
This means the air/fuel mixture is leaner than the HO2S can compensate for.


This is most often caused by a vacuum leak. It can also be caused by a clogged fuel filter, unmetered air entering the air intake system, leaking exhaust system, canister purge system not operating or a weak fuel pump.


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

Thank you for using FixYa, have a nice day.

Aug 10, 2012 | 2007 Hyundai Accent GS Hatchback

1 Answer

Engine management light on-P1128 Manufacturing control


No such code listed (P1128) for 2002 Accent

Aug 29, 2011 | 2002 Hyundai Accent

1 Answer

Code p1128 weak mixture lose power on inclines engine light on melts spark plugs vehicle hyundia accent 2001


Go to www.hmaservice.com and register your vehicle by VIN #..
you'll then have access to wiring diagrams, shop manuals,
service bulletins, illustrations, etc. To diagnose a 2000 or 2001 1.5L Accent Diagnostic Trouble Code (DTC) P1128 (FUEL SYSTEM LEAN -- PART LOAD), check the following:
  • Check the intake system for air leaks.
  • Check that the Mass Air Flow (MAF) Sensor (P/N 28164-22610) operation meets the specifications listed below. If the MAF sensor output is significantly lower than the reference value (10% or more), then replace the MAF sensor.
Table 1: Using the Hi-Scan Pro in the Hyundai Diagnostic Menus Current Data Screen TPS (%) 0
3.5
5.1
7.4
MAF (kg/h) 10
21
30
47
RPM IDLE
2000
3000
4000
Table 2: Using the Hi-Scan Pro in the OBD-II Menus Current Data Screen TPS (%) 0
3.5
5.1
7.4
MAF (g/h) 2.8
6
8.5
12.7
RPM IDLE
2000
3000
4000


WITH MANUAL TRANSMISSION


Table 3: Using the Hi-Scan Pro in the Hyundai Diagnostic Menus Current Data Screen TPS (%) 0
2.4
3.9
5.9
MAF (kg/h) 9.5
19.4
28.8
43
RPM IDLE
2000
3000
4000
Table 4: Using the Hi-Scan Pro in the OBD-II Menus Current Data Screen TPS (%) 0
2.4
3.9
5.9
MAF (g/h) 2.5
5.5
8
12
RPM IDLE
2000
3000
4000

Jun 26, 2011 | Hyundai Accent Cars & Trucks

1 Answer

I go ta obd11 code of p1128 I can't find it I have a 1999 Elantra my car acting like it want to crank but won't I have to sit and it will eventually crank


you are having trouble with you MAF, mass air flow sensor. It may be dirty. It is fragile so use the correct cleaner made just for mass air flow sensors. Check the electrical connection for corrosion and tightness.

http://www.hyundai-forums.com/t3498-3900-accent-p1128-dtc.htm

Jan 20, 2011 | Hyundai Elantra Cars & Trucks

1 Answer

My hyundai accent 2000 has 25,000 miles and the the check engine light has been on for over 3 months. I know the diagnostic code is P1128. I have had the car to 2 mechanics and they can not say...


P1128 is a lean condition, try cleaning the Mass Air Flow (MAF) sensor. You can buy a can of MAF cleaner at most auto parts store like Auto Zone, and they will have the instructions for you to remove the MAF. Try cleaning it first and then disconnect the battery, just make sure the radio is off first before you disconnect the battery. If the DTC 1128 is still there, the MAF may be bad and needs to be replaced but before you replace the MAF. Check with the Hyundai dealer for any TSB on that code. Good luck and keep me posted. The dealer want $270.00 for the MAF sensor!! ouch!! scouted around...NAPA has them for $105.00. Most local salvage yard for $35.00 - $75.00

Dec 01, 2009 | 2000 Hyundai Accent

1 Answer

2000 accent p1128


dear friend-looking at the fault code it tells me that your vehicle is running lean.plse look at the following:HO2S,FEUL PRESSURE,FEUL SYSTEM,MECHANICAL FAULT,ECM.

Jul 03, 2009 | 1999 Hyundai Accent

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

P1128 code on 2000 hyuandai accent


I did some research because the P1128 is an odd code for Hyundai and I couldnt find a lot of information on it, but I found two things that may help and neither point to the fuel pump.

1. P1128 in Hyundai refers to the Mass Airflow Sensor or MAF being defective.
2. There is a TSB from Hyundai, TSB 01-36-022, but I wasnt able to ascertain if that was a specific TSB for the MAF or if it was information on how to test the MAF or some other information.

P1124 seems to be a related code as well but I could find little on it. P1124 in a Subaru is an issue with the Throttle Position Sensor or TPS, but I could not confirm that for Hyundai.

My first suggestion would be to check your air filter and if it has not been changed in a while or is really dirty, then change it as a restriction in air flow might be mistaken by the computer as a problem with the MAF.

Jan 02, 2009 | 2000 Hyundai Accent

Not finding what you are looking for?
2001 Hyundai Elantra Logo

676 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hyundai Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8572 Answers

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

Answer questions

Manuals & User Guides

Loading...