Question about 2000 Volkswagen Beetle

4 Answers

Trouble codes P0172 and P1128 - VW Beetle

I have trouble codes P0172 and P1128 - VW Beetle 1999.

I did some investigations, looked at the vacuum hoses (nothing obvious). According to Hanes manual, I did the check of the electrical connector to the MAF. It says that one of the terminals should have ~12V but I get no reading on it. Checked the fuses, all good.

What to do next?

Posted by on

  • 2 more comments 
  • cdragojle Jun 30, 2009

    Thanks. I know what they mean.
    I tried cleaning the MAF with the MAF Cleaner - did not help. I'll recheck the vacuum hoses as most of the forums advise that, but I doubt I'll find anything new. I thoroughly checked them already.
    I guess, my next step would be to change the MAF or check the MAF connector and wires again, but I don't know where they lead and originate.

  • cdragojle Jun 30, 2009

    Thanks. I know what they mean.
    I tried cleaning the MAF with the MAF Cleaner - did not help. I'll recheck the vacuum hoses as most of the forums advise that, but I doubt I'll find anything new. I thoroughly checked them already.
    I guess, my next step would be to change the MAF or check the MAF connector and wires again, but I don't know where they lead and originate.

  • cdragojle Jun 30, 2009

    Thanks. I know what they mean.
    I tried cleaning the MAF with the MAF Cleaner - did not help. I'll recheck the vacuum hoses as most of the forums advise that, but I doubt I'll find anything new. I thoroughly checked them already.
    I guess, my next step would be to change the MAF or check the MAF connector and wires again, but I don't know where they lead and originate.

  • cdragojle Aug 18, 2009

    I solved the P1128 and P0172 codes. I replaced the MAF and the codes are now gone!

×

Ad

4 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 218 Answers

The code P0172 means...system too rich(cyclinder bank No.1)..and all of the OBDII fault codes begin with a "P0"..i dont know what a P1128 is....i hope this will help you

Posted on Jun 28, 2009

Ad
  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 2 Answers

I had the exact same problem, P0172 and P1178 on a 2000 New Beetle GLS. My CEL would come on after several days of driving. I was able to solve it with a Mass Air Flow sensor cleaning. The CEL went out after about 3 days of short trips. Thanks for the posting.

Posted on Mar 24, 2010

Ad
  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

99 Volkswagon Beattle - I got P0341 and P1128 ----- P0341 is going to be the camshaft - and P1128 is going to be "Long term fuel trim B1 system too lean" - as for the p1128 code, I'm going to try to clean the MAF sensor and also do a Throttle body service. I'll let you know if it works.

Posted on Aug 23, 2010

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

Probably maf sensor

Posted on Nov 21, 2009

4 Suggested Answers

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

j_del
  • 1586 Answers

SOURCE: trouble codes

The listing of codes that I have states that a P11xx code is related to fuel and air metering. I'd suspect from the past to check for vacuum leaks (broken, cracked or disconnected vacuum lines) or possibly the mass airflow sensor. You can get electrical contact cleaner from Radio Shack, unplug the electrical connector for the mass airflow sensor, and clean it to see if that helps.

Posted on Sep 28, 2008

localwonder
  • 6784 Answers

SOURCE: 2.0 engne - errors codes p0134, p0172, p1128. What is the problem and how od i fix it?

Trouble Code: P0134


HO2S (Bank 1 Sensor 1) Circuit No Activity

Possible Causes:


Leaks present in the exhaust manifold or exhaust pipes

HO2S signal wire and ground wire crossed in connector (voltage jumps)

HO2S element is fuel contaminated or has failed

ECM has failed



Trouble Code: P0172


Fuel System Too Rich (Cylinder Bank 1)

Possible Causes:


Camshaft timing is incorrect, or the engine has an oil overfill condition

EVAP vapor recovery system failure (may be pulling vacuum)

Fuel pressure regulator is damaged or leaking

HO2S element is contaminated with alcohol or water

MAF or MAP sensor values are incorrect or out-of-range

One of more fuel injectors is leaking



Trouble Code: P1128


Long Term Fuel Trim Add. Air. Bank 1 System Too Lean

Possible Causes:


Fuel pressure is too low or fuel quantity supplied is too low

Fuel filter faulty

Transfer fuel pump has failed

Fuel injector is faulty (sticking or not opening)

Engine speed (RPM) sensor is faulty

MAF sensor circuit open

MAF sensor circuit shorted to ground

Air leak in the manifold

Secondary air injection system combi-valve stuck open

Secondary air injection system electrical short

ECM has failed

Posted on May 24, 2009

bschilz
  • 2049 Answers

SOURCE: 1998 vw beetle codes p0411 and p1128

P0411 Secondary Air Injection System Incorrect Flow Detected
The 4mm inside diameter vaccuum hose gets pinched between the lower intake manifold and the secondary air pump housing, flattening it over time.
Here's a link to the steps to fix yourself if you are mechanically inclined...
http://forums.vwvortex.com/zerothread?id=1995162

P1128 Long Term Fuel Trim Is Too Lean
It is very likely this code is coming up because of the vacuum hose as well.

Posted on Oct 20, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

6 Answers

P0171 and p0172 codes


the following links explain the codes and practical and a procedural way of doing so as to not through parts at problem
http://www.obd-codes.com/p0171 http://www.obd-codes.com/p0172

Jul 07, 2016 | 2004 Chevrolet Chevrolet TrailBlazer LS

1 Answer

OBDII VW Code 17990


i found this on another forum. Hope it helps.
profile_thumbnail.jpg?222960e9c2d5 Master


This is the code info: 17990 P1582 Idle Adaptation at Limit

The idle control system on your car compensates to keep the engine idling properly, when it has to over compensate, it sets a code. Vacuum leaks are a main cause, but it could also be the result of one of the sensors in the engine management system. Perform a visual check of the vacuum lines and intake hoses and look for loose clamps, disconnected hoses etc

Dec 31, 2011 | 1999 Volkswagen Beetle

1 Answer

Trouble code 1997 Hyundai Elantra, P1128


P1128 trouble code is for (Upstream Heated O2 Sensors Swapped). Did you switch around any of the O2 sensors?

Apr 24, 2010 | 1997 Hyundai Elantra

1 Answer

1998 vw beetle codes p0411 and p1128


P0411 Secondary Air Injection System Incorrect Flow Detected
The 4mm inside diameter vaccuum hose gets pinched between the lower intake manifold and the secondary air pump housing, flattening it over time.
Here's a link to the steps to fix yourself if you are mechanically inclined...
http://forums.vwvortex.com/zerothread?id=1995162

P1128 Long Term Fuel Trim Is Too Lean
It is very likely this code is coming up because of the vacuum hose as well.

Oct 20, 2009 | 1998 Volkswagen Beetle

1 Answer

2.0 engne - errors codes p0134, p0172, p1128. What is the problem and how od i fix it?


Trouble Code: P0134


HO2S (Bank 1 Sensor 1) Circuit No Activity

Possible Causes:


Leaks present in the exhaust manifold or exhaust pipes

HO2S signal wire and ground wire crossed in connector (voltage jumps)

HO2S element is fuel contaminated or has failed

ECM has failed



Trouble Code: P0172


Fuel System Too Rich (Cylinder Bank 1)

Possible Causes:


Camshaft timing is incorrect, or the engine has an oil overfill condition

EVAP vapor recovery system failure (may be pulling vacuum)

Fuel pressure regulator is damaged or leaking

HO2S element is contaminated with alcohol or water

MAF or MAP sensor values are incorrect or out-of-range

One of more fuel injectors is leaking



Trouble Code: P1128


Long Term Fuel Trim Add. Air. Bank 1 System Too Lean

Possible Causes:


Fuel pressure is too low or fuel quantity supplied is too low

Fuel filter faulty

Transfer fuel pump has failed

Fuel injector is faulty (sticking or not opening)

Engine speed (RPM) sensor is faulty

MAF sensor circuit open

MAF sensor circuit shorted to ground

Air leak in the manifold

Secondary air injection system combi-valve stuck open

Secondary air injection system electrical short

ECM has failed

May 24, 2009 | 2000 Volkswagen Beetle

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

Trouble codes


The listing of codes that I have states that a P11xx code is related to fuel and air metering. I'd suspect from the past to check for vacuum leaks (broken, cracked or disconnected vacuum lines) or possibly the mass airflow sensor. You can get electrical contact cleaner from Radio Shack, unplug the electrical connector for the mass airflow sensor, and clean it to see if that helps.

Sep 28, 2008 | 2000 Volkswagen Beetle

2 Answers

Trouble codes


what does the code p1128 mean

Sep 21, 2008 | 2000 Volkswagen Beetle

1 Answer

1999 VW beetle won't start; battery good


the "brain" of the car might be giving out. one thing about the brain is it controls everything...mainly the cpu thats gives out codes!

Jul 29, 2008 | 1999 Volkswagen Beetle

Not finding what you are looking for?
2000 Volkswagen Beetle Logo

6,109 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volkswagen Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

yadayada
yadayada

Level 3 Expert

76846 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8567 Answers

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

Answer questions

Manuals & User Guides

Loading...