Question about 2003 Volkswagen Passat
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Posted on Jan 02, 2017
SOURCE: 1997 VW Passat trouble code
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.
Posted on May 16, 2009
when you are looking at the engine pull off the plastic cover on top then the front cover that covers you timing belt there is a wire harness tha goes right to it in the left upper coner two ten mil bolts and it comes off careful not to drop bolts down in belt that could be bad. it is that easy
Posted on Sep 01, 2009
The coolant temperature sensor on the V6 Passat is located on a pipe
that crosses between cylinder heads on the firewall side of the engine.
A. You will need to remove the plastic cover over the intake manifold.
B. Remove the air filter housing
c. disconnect the Mass Airflow Sensor
D. Loosen the clamp on the far end of the flex pipe going into the intake
Gently pry the flex pipe off the plastic housing and slide it off
the sendor is located around E.
Posted on Nov 04, 2009
There's a level sensor plugged into the bottom of the coolant reservoir. Unplug it and clean the contacts with electrical contact cleaner. If that doesn't do the trick, replace the sensor.
Posted on Dec 01, 2009
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