Hey i got a check engine light on and the codes are p0160 which is bank 2 sensor 2 o2 sensor and code p2279 which is intake system leak. How hard is it to replace the o2 sensor?

 

using "search this thread" find my post:
Bank 2 o2 sensor workaround

 

Yea i found it. Do u think i can remove the rear sensor without even taking anything off? Of is the rear one still hard to get to? Also before i mess with the o2 sensor i will see if i can find any intake air leaks because ive been told many times that a intake air system leak could cause the o2 sensor to go on.

 

I don't think the config has changed much over time. Mine is an 05. IMHO The "post-cat" sensor (i.e. below the pre-cat) is virtually impossible to change without removing the pre-cat. The best way to check for air leaks is with a smoke test. Note: there is a specific protocol for doing the smoke test in order to isolate any leaks.

 

Oh i see. I was going to do the leak test with either propane or starting fluid like i have done on most other cars. Is that fine if i do that on the bentley?

 

Sorry I don't know the answer re propane or starting fluid. The easiest air leak to find is at the center top of the firewall with the two hoses going into the intake manifold. The most problematic air leak is in the T junction of the air line
over the transmission. This one requires an engine out procedure!

Beside the CEL, do you have any other symptoms?

For your possible interest there are several youtube videos showing smoke testing on a Bentley. I don't have the specific URL but I'm sure you can find them.

 

I will be sure to check those spots. So the idle is rough, sometimes stalls, and it smokes a little. Im guessing it smokes because of the bad fuel/air ratio

 

When you step on the brake, do you hear a pump running on the left side just behind the wheel arch? Does the pump keep running when you lift your foot off the brake?

 

I havnt checked. But if it does then what does that mean? As soon as i get home i will check.

 

It is extremely difficult to do a remote diagnostic. If the pump keeps running, it generally indicates and confirms that you have a vacuum leak. Where it is is the next question. Do you have the ability to do a
"deep level" system scan? I.E..
Vas5054A?

 

 

When i pressed on the brakes i didnt hear anything turn on. I checked the fuses inside the car under the steering wheel and the 15 amp vacuum pump fuse which is number 7 is blown. I replaced it and it keeps going out. What could be causing the fuse to go? And where exactly is that pump? Thanks for all your help by the way!

 

There is a local shop that can scan the car and do the vacuum test but they are pretty busy so i want to see if i can figure it out.

 

It's shown in the second video that I posted, below the blue 3 chamber vacuum reservoir in the drivers side wheel well.




Johnny J J

 

Here is a diagram of all the fuses in the driver's compartment (see attachment: "driver's panel.pdf").