Question about Volkswagen Cars & Trucks
Posted by Anonymous on
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Posted on Jan 02, 2017
Not sure that the O2 sensor was bad. It sounds like it was telling you that side of the exhaust system was picking up a lean mixure at the O2 sensor. The O2 sensor was doing its job by telling you the mixture changed. If the O2 sensor was bad, it would say low voltage range for that sensor, or open curcuit.
Now the car has had time to do its diagnostic sweep, it is telling you the same thing, but from a different sensor...the fuel mix is too lean. Air/spark/and fuel is what you need in the correct amounts. In your car, the ECM engine control module controls this by taking readings from all the sensors several hundred times a second.
Mechanically, you have a few options. Change the fuel filter...under the car on the passenger side. It is an easy job.
Change the fuel pressure regulator. This keeps the fuel at 4 BAR so the fuel injectors can do their job correctly. This job just needs a screw driver to pop off the clip that holds it in place. No hoses need to be removed. It is on top of the intake manifold, in-line with a metal fuel line and a rubber one.
The fuel injectors could be clogged up on one side of the engine. Run some fuel injector cleaner through a tank of gas. Also, listen for a constant ticking sound at each injector. If one sounds off PAR, then replace it.
The fuel pump may not be giving you enough power. However, the readings seem to be localized to one side, so I doubt it.
Start with the easiest thing, and see if it works. Also, you will need to get yourself a VAG scan tool. It is the only one with codes in it for all of your VW systems, not just engine codes like the ODB scanners. You can get a nice one for $50 on-line.
Posted on Feb 24, 2010
SOURCE: p1177 engine code
This code can be a sensor code but the real task is to find out why the code was set in the first place. Is the sensor malfunctioning or is there something else that is causing the sensor to give erratic readings. We had this same code on a Passat that was brought into our shop, go here to read our confirmed fix.
Posted on Sep 22, 2010
You can find the radio code at: http://www.radio-code.co.uk/
The sequence of programming for 2004 Volkswagen Passat radio is:
1. Push simultaneous "SCAN" and "RDS" keys until on the screen will appear "1000" displayed.
2. Release keys. No more push on "SCAN" and "RDS" keys because otherwise number "1000" will be considered as first safe code attempt.
For example: we have the security code "5079". Then:
3. By the no.# 1 key you will set up the first safe code digit. Push 5 times on the no.# 1 button. The "5" number will be setted.
4. By the no.# 2 key you will set up the second safe code digit. Push 10 times on the no.# 2 button. The "0" number will be setted.
5. By the no.# 3 key you will set up the third safe code digit. Push 7 times on the no.# 3 button. The "7" number will be setted.
6. By the no.# 4 key you will set up the four-th safe code digit. Push 9 times on the no.# 4 button. The "9" number will be setted.
7. Then push again simultaneous "SCAN" and "RDS" keys for confirm this safe code. On the screen will be displayed "SAFE" notice. Release keys! For few seconds a radio frequence will be displayed. The radio is now ready for use!
Please do rate my response. Thanks!
Posted on Feb 12, 2011
SOURCE: 2004 vw passat yellow engine
That is the Check Engine Light. It indicates there is a problem with the emissions system. Can be as simple as a loose gas cap or more serious. If the engine is not running correctly then have this looked at immediately. If however the engine is running good then you do not have to be in a hurry. Have the ECU scanned at most auto parts stores for free. They will retrieve a code that has been set. This code will tell you what part is being effected and help to lead you in the direction of the problem. Do not just throw parts at the problem. You may in the end be much better off taking it to a professional for diagnosis and repair.
Posted on Feb 13, 2011
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