Question about 1997 Volkswagen Passat

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What's your question?how to clear mfa light on vw passsat 1997 model

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  • Volkswagen Master
  • 3,828 Answers

Clean the maf

replace if faulty

Posted on Oct 27, 2016

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Posted on Jan 02, 2017

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SOURCE: VW Passsat - 98 -

First check the coolant overflow and add a little water if low (if you have antifreeze then a pint of water will not dilute it enough to matter).   
Go to a parts store that will plug in and read the OBD II codes for free (autozone among others).  My dealer change $50 just to read the codes.  BTW you can buy a simple VW code reader for $50!   ABS system will give specific codes as to what is wrong.  Coolant warning light is usually either low coolant in resevoir or overheating.  If the coolant light comes on when you first start up,  it's probably just low coolant level.  My wifes 98 Passat and my 2005 Jetta TDI both did this for a slightly low coolant with no detectable leak.   

If you have to add coolant more than once, you may have a small internal leak (read in the cylinder head) which you will not be able to find.   A Mechanic can do a pressure leak down test to find out.  This is one of the 2 times in 35 years where I used Barr's Stop Leak on our 98 Passat with 120K miles for this slow internal leak symptom ... it's 20K miles later and I have not had to add coolant since the Barrs.  I generally hate these fix it in a can type products, since many of them are snake oil,  but Barrs can work without side effect in some cases.  I have it from a reliable source that the manufacturers use a smiliar substance on new engines now that most cylinder heads are aluminum, but I have no way to verify.
good luck ..ajm







Posted on Nov 01, 2008

  • 74 Answers

SOURCE: VW JETTA (BORA) 2 - 1991, CLUSTER

CHECK THE PRINTED CIRCUIT ON BACK OF CLUSTER & SEE IF VOLTAGE STABILIZER IS CONNECTED IT LOOKS LIKE A SMALL PITCHFORK

Posted on Feb 19, 2009

  • 12 Answers

SOURCE: on my 1992 vw slc the mfa speedometer, tachymeter,

change relay switches

Posted on May 12, 2010

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1997 VW Passat trouble code


Hi ejj509,

Both my 97 Passat and my wife's 99 Passat were throwing the same OBD codes you listed.

Both VW's had the same problem. There is no "quick" solution for the problem. I can tell you what I found, what I had to do and how I repaired both vehicles so they no longer throw this OBD error code.

I removed the black plastivc AIR pump and found that three of the six aluminum rivets which hold the AIR pump impeller housing together had rotted off so the case was leaking air. I went to a hardware store with one of the aluminum rivets I had removed from the AIR pump and bought six brass machine screws and brass nuts. I gouged the aluminum rivets out and replaced them with the brass machine screws.

After I had replaced the AIR pump in the VW, I cleared the codes and ran the diagnostics again.
It still threw the same codes!!!

Next, I removed the plastic top engine cover from the VW engine (VR6) and located the many air solenoids hidden under the cover. I went to a local NAPA shop and purchased an eight foot length of their smallest gauge neoprene gas line (1/8 inch ID).

I carefully removed each piece of rotted VW vacuum line from the air solenoids and replaced each rotted section with lengths of the new neoprene gas line. I had to follow out each of the old vacuum lines and replace them because they were badly deteriorated. This took about five hours to accomplish.

I replaced the plastic engine cover and connected up my cable from my laptop to the VW's computer port, cleared all of the codes and ran a new scan. This time the scan was clear! Woo Hoo! Apparently, the problem was both the leaking AIR pump and faulty, deteriorated (cheap) Volkswagen vacuum lines.

It was well worth the effort. My driveway has now become a bonafied VW repair shoppe.



Nov 07, 2008 | 1997 Volkswagen Passat

2 Answers

VW Passsat - 98 -


ABS and coolant are unrelated unless there is a problem with the ECM (engine control module) or instrument panel. Is the red coolant warning sign for coolant level or temperature?

With ABS if there is any failure with any brake electronic component (sensor, motor, or fluid level etc) the ABS will shut down completely and flash the light. If the light is on or flashing the ABS is non functioning.

I need better information on the coolant and ABS to give better information.

Nov 01, 2008 | 1998 Volkswagen Passat

1 Answer

VW JETTA (BORA) 2 - 1991, CLUSTER


CHECK THE PRINTED CIRCUIT ON BACK OF CLUSTER & SEE IF VOLTAGE STABILIZER IS CONNECTED IT LOOKS LIKE A SMALL PITCHFORK

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