Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN









Oxygen Sensor Replacement (2000 VW Bora/Jetta 2.0L)


  Email This Post



MKD
New User

May 1, 2012, 7:50 AM

Post #1 of 3 (3081 views)
Shortcut
Oxygen Sensor Replacement (2000 VW Bora/Jetta 2.0L) Sign In

For a while now, mums car has been having some issues.

-Poor fuel economy
-Rough idle
-Turns off whilst slowing down to a stop sometimes

We took it to a mechanic who ran a Diagnostics and he told us that the O2 sensors are failing. The post-cat O2 sensor is pretty much dead, and the pre-cat sensor is working, but not as good as it should.

I went ahead and ordered both sensors, and replaced the post-cat today.

I read a on a few forums that driving it around for 15-30mins to let the ECU readjust the sensor to perform accordingly.

However, after driving it for >30 mins, it has gotten worse.

The rough idle stayed the same, but the turning off whilst approaching a stop became more frequent.

I am yet to install the pre-cat O2 sensor, but I need some help getting to it and running the cable behind the heat shields properly.

The only other thing I can think of is faulty/dirty MAF which I'm planning to try and give it a clean with an MAF cleaner first, before ordering a new one (hopefully I wont have to)

Any other suggestions?

Thanks.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

May 1, 2012, 8:41 AM

Post #2 of 3 (3056 views)
Shortcut
Re: Oxygen Sensor Replacement (2000 VW Bora/Jetta 2.0L) [In reply to] Sign In

Not in that club. Driving it around is not going to repair a really/truly bad O2 sensor but can help to burn junk out of a converter. You've had the hands on diagnostics done that condemned it so when you get it put it in ASAP. Pre-cat O2 sensor can make a vehicle run lousy and the longer it is allowed to run lousy the more you are risking destroying the converter,

T
_________________________________________
Long retired now


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

May 1, 2012, 10:29 AM

Post #3 of 3 (3042 views)
Shortcut
Re: Oxygen Sensor Replacement (2000 VW Bora/Jetta 2.0L) [In reply to] Sign In

TRhe downstream sensor has absolutely no control over fuel mixture. It's a Cat monitor only.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.





Advertising


  Email This Post
 
 






Latest Forum Post

Hey people, Just as soon as I've got rid of one car and got another, I've got a...


on a 1998 Chrysler cirrus the heater blows warm thru the vents. When u turn it o...


I will try and be as clear as I can. 1999 Fleetwood tioga (ford e350) I turn my ...


I have a 2006 Nissan maxima 3.5 There is nothing wrong with it but I was wonde...


blower motor did not work i pulled it out and tested it it worked i put it back...


So I have a 1999 ford escort zx2 it has the 2.0 i4 doc engine with the 5 speed t...


Feed Button






Automotive Forum Categories
AC Auto Repair
Auto Body Repair
Auto Insurance
Automotive Repair
Automotive Wiring
Automotive World
Brake Systems
Car Care Tips
Car Racing
Car Shows and Events
Car Stereo Repair
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair
Gasoline and Motor Oils
General Discussions
Motor Vehicle Inspection
Motorcycle ATV Repairs
Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Repair
Motorcycle Seat Repair
Remote Control Cars
Steering and Suspension
The Bargin Bin
Traffic Ticket Help
Tricks of the Trade
Truck Repair
Truck Repair Advice
Truck Engine Repair
Truck Suspension Repair
Car Forum - Sitemap


Search for (options) Privacy