Question about 2004 Mercedes-Benz C-Class

2 Answers

My air mass sensor, throttle valve actuator problem.

My air mass sensor, throttle valve actuator is causing the car to atsll and it will not idle unless i increase the throttle adjustment.

Posted by on

  • kam518 May 08, 2009

    very similar issue, car always stalls unless i physically increase the revs.



    A 'specialist' has changed the air mass sensor and spark plugs along with a cleaning of tjhe exhaust system. He then wanted me to pay £850 for a new throttle body. As expected i coudnt justify such costs.



    The problem still persists, and looking at other google searches everything points to a mass sensor problem????



    any help appreciated, kam

×

Ad

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

Yoy need to change both the Air Mass Sensor and throttle valve actuator to eliminate this problem. The actuator is pretty pricey but thats the ONLY solution i'm afaraid.

Posted on Jun 09, 2009

Ad
  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

All sorts of information available on the Merc 'A' class go to gooogle :- lofty's Homepage or go to http://www.aclassinfo.co.uk/index.html

Posted on May 02, 2011

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 Mechanic 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 repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I just got my car scanned and a few codes pop up


Error Code: P0130
Fault:
Oxygen Sensor (O2S) 1, Bank 1 - Circuit Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL) Triggered on first occurrence.
-Wiring harness.
-Oxygen sensor (O2S).
-Engine control module (ECM).

Error Code: P0505
Fault:
Idle Speed Control (ISC) System - Malfunction
Possible Cause:
-Wiring harness.
-Idle speed control (ISC) actuator/Idle air control valve (IAC) valve.
-Throttle motor.
-Throttle valve tight/sticking.
-Engine control module (ECM).

Error Code: P0100
Fault Location:
-Mass Air Flow (MAF) Sensor/Volume Air Flow (VAF) Sensor - Circuit --Malfunction
Possible Cause:
-Wiring harness.
-Mass air flow (MAF) sensor.
-Volume air flow (VAF) sensor.
-Engine control module (ECM).

Error Code: P1491
Fault:
Exhaust Gas Recirculation (EGR) Valve Insufficient Lift
Possible Cause:
-Wiring harness.
-EGR Valve.
-ECM

Error Code:P1607
Fault:
-Engine Control Module (ECM)/Powertrain Control Module (PCM)

Error Code: P0966
Location:
-Pressure Control (PC) Solenoid B - Circuit Low
Possible Cause:
-Wiring short to earth.
-Pressure control (PC) solenoid.
-Engine control module (ECM)/Powertrain control module -(PCM)/Transmission control module (TCM) .


Apr 30, 2013 | 2004 Honda Civic

1 Answer

High idle o n a 1996 chrysler concorde. have change the tps and the idle air control valve. i think its a vacum line but i dont know which one. which one s effect the idle


High idle is usually caused by a vacume leak. First place to check is the cold air intake manifold. All hoses, throttle body, and sensors. Throttle Position(TPS), Mass Airflow(MAS), Idle Air Control Motor (valve) IAC. Controls Idle speed

A malfunctioning throttle system can cause both a high idle as well as an engine stall.

A dirty air intake or cracked air intake tube is often the culprit.

How to Fix an Engine High Idle in Under 15 Minutes

Oct 16, 2011 | 1996 Chrysler Concorde

1 Answer

P1512 of my 00 MPV, what is the solution?


DTC P1512 - VARIABLE TUMBLE CONTROL SYSTEM (VTCS), STUCK CLOSED
The air intake hose that goes from the air filter/mass airflow sensor to the throttle body they are common to crack. This air leak can cause a lean condition if that checks out ok then the issue is usually a faulty mass air flow sensor .This would need to be checked next.

Usually the actuator valve is stuck closed. These are the most common causes of the P1512 and possible causes are:
* ECT sensor malfunction.
* MAF sensor malfunction.
* IAT sensor malfunction.
* EGR boost sensor malfunction
* TP sensor malfunction.
* CKP sensor malfunction
* VTCS solenoid valve malfunction.
* VTCS shutter valve stuck closed.
* VTCS shutter valve actuator stuck closed.
* Short circuit between PCM and VCTS solenoid valve.
* PCM malfunction.

I would start with the mass air flow sensor this can cause all these issues. Then the cat. This would be the next step.

I hope this helped (remember to rate and comment this answer).

Aug 15, 2011 | 2001 Mazda MPV

2 Answers

Have an automatic transmission, 2001 Kio Rio. Problems when idling, sometimes high, sometimes low and will stall but starts right back up. I've replaced the Mass Air Sensor, spark plugs, air filter, coil....


It sounds to me like you have replaced everything except the most likely cause of your idle control problem...The Idle Air control. (IAC) (or Idle Speed Control Valve) It is located onthe throttle body and looks like the picture below.

dttech_3.jpg

Feb 22, 2011 | 2001 Kia Rio

2 Answers

On a 3.5 engine code reads low idle? any idea


LOW IDLE CAN BE CAUSED BY MANY THINGS.CLOGGED AIR FILTER. LOW COMPRESSION OR MISFIRE CONDITION.IDLE AIR INLET PASSAGE OR THROTTLE BORE IS DIRTY OR FULL OF DEPOSITS.IDLE AIR CONTROL VALVE FAILED.MASS AIR FLOW SENSOR COULD BE OUT OF CALIBRATION. THROTTLE PLATE THROTTLE SHAFT OR LINKAGE IS DAMAGED OR STICKING.PROBABLY HAVE REMOVE THROTTLE BODY ASSEMBLY REMOVE IDLE AIR CONTROL VALVE AND THROTTLE POSITION SENSOR.BUY CAN OF CARBURETOR OR THROTTLE BODY CLEANER SPRAY CLEAN ALL CARBON BUILT UP AROUND THROTTLE PLATES AND BORE.LET AIR DRY BUY A NEW THROTTLE BODY GASKET.

Jul 05, 2010 | Chevrolet Colorado Cars & Trucks

2 Answers

Wont idle right.Idles at 2000 rpm then drops to 900 or less then usually will stall.If i unplug the mass air sensor while it is running nothing changes. Does this mean it is bad? Thanks,John


MAF concerns the proper mixture of fuel, not the idle speed, so it is most likely all right (if it wasn't, your car would die before it reached 2000 RPM's). Idle speed is controlled by a small motor, generally mounted around the throttle plate. This is controlled by a computer, which judges idle requirements by the input from crank or camshaft position sensors. Make sure that all of your sensors are clean, and in proper operation.

Dec 01, 2009 | 1996 Volkswagen Jetta

2 Answers

1991 toyota pickup dies when you release the gas pedal


There are couple of things I would check out that would cause this problem.

1. The Mass Air Flow Sensor. It measures how much air is going into the engine. Should be located on top of air filter box.

2. The air tube that goes from the Mass Air Flow Sensor to the throttle body. Check for leaks that would bypass air from going through the Mass Air Flow Sensor.

3. The Throttle Position Sensor. Located on the throttle body. This tells the computer what position the butterfly plate is on the throttle body. You control this plate with the gas pedal..

Oct 11, 2009 | 1991 Toyota Pickup

1 Answer

My 1995 c220 benz air mass sensor, throttle valve


hello,try to clean your throttle valve actuator,sometimes the flap get sticky because of fumes of fuel,ty

Apr 15, 2009 | 2004 Mercedes-Benz C-Class

2 Answers

Were is the IAT in a 2004 nissan altima


Removal and Installation To Remove:
  1. Remove or disconnect the following:
    • Mass air flow sensor electrical connector
    • Tube clamp at the electronic throttle control actuator
    • Air cleaner to electronic throttle control actuator tube, upper air cleaner case
    • Mass air flow sensor from the cleaner case.
To Install:
  1. Install or connect the following:
    • Mass air flow sensor to the cleaner case
    • Air cleaner to electronic throttle control actuator tube
    • Tube clamp at the electronic throttle control actuator
    • Mass air flow sensor electrical connector
prev.gif next.gif

Mar 28, 2009 | 2004 Nissan Altima

2 Answers

Wont stay runing


try pulling the plug out on the idle air control valve then start it if thats not it try the map then the idle control

Dec 13, 2008 | 1998 Jeep Grand Cherokee

Not finding what you are looking for?
2004 Mercedes-Benz C-Class Logo

Related Topics:

1,548 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

yadayada
yadayada

Level 3 Expert

77201 Answers

Joseph Prosser

Level 3 Expert

771 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...