Service engine soon?

**Gonzo** · 08-08-2006, 12:39 PM

A code for this is quite common. Probably just a coinsidense that it happened while in the shop. One of three things can cause it. Your Purge Cannister is back drafting into the engine causing high levels of carbon to build up in the intake which in turn will cause a faulty code to set with the EGR valve. The second is it's just a bad EGR that activated after the car was not run for a while. And the third possibility is faulty wiring going to the sensor or a bad sensor.

Your fuel door being open would likely cause a code to set with the oxygen sensor...not the EGR.

**Saulbadguy** · 08-08-2006, 12:41 PM

Quote:

Originally Posted by Gonzo8888

A code for this is quite common. Probably just a coinsidense that it happened while in the shop. One of three things can cause it. Your Purge Cannister is back drafting into the engine causing high levels of carbon to build up in the intake which in turn will cause a faulty code to set with the EGR valve. The second is it's just a bad EGR that activated after the car was not run for a while. And the third possibility is faulty wiring going to the sensor or a bad sensor.

Your fuel door being open would likely cause a code to set with the oxygen sensor...not the EGR.

1) What the hell is an EGR Valve?
2) How much am I looking at to fix this?

**Gonzo** · 08-08-2006, 12:43 PM

Quote:

Originally Posted by Saulbadguy

1) What the hell is an EGR Valve?
2) How much am I looking at to fix this?

The exhuast gas recirculation (EGR) system is an important part of the emissions controls in the nissan engine. This also has a large effect on the NOx emissions (my car recently failed emissions due to almost twice the limit of NOx ppm but passed the other parts). You can replace the part, but it's about $100 from the dealer and I've heard people having good results just cleaning it out so I figured I'd try that first. I was able to pass emissions easily after doing this cleaning; it made a huge difference my NOx levels.

If you put your fingers on the underside of the EGR valve beneath the disc part, you should be able to push up on the valve and feel it move. With the car running, you should feel the valve move up when you rev the engine. You can also pull off the upper vacuum line going into the EGR valve and you can feel the vacuum on it when you rev the engine if everything is working properly

Brock · 08-08-2006, 12:44 PM

Quote:

Originally Posted by Saulbadguy

1) What the hell is an EGR Valve?
2) How much am I looking at to fix this?

1. It sends lubrication to the muffler bearings.

2. Exquisitely expensive.

good luck.

Calcountry · 08-08-2006, 04:31 PM

Quote:

Originally Posted by Saulbadguy

1) What the hell is an EGR Valve?
2) How much am I looking at to fix this?

I am curious Saul, what Make and model car was it?

08-08-2006, 12:39 PM	#1
Gonzo Stuff & Things Join Date: Jan 2006 Location: The Yukon Casino cash: $10126924	A code for this is quite common. Probably just a coinsidense that it happened while in the shop. One of three things can cause it. Your Purge Cannister is back drafting into the engine causing high levels of carbon to build up in the intake which in turn will cause a faulty code to set with the EGR valve. The second is it's just a bad EGR that activated after the car was not run for a while. And the third possibility is faulty wiring going to the sensor or a bad sensor. Your fuel door being open would likely cause a code to set with the oxygen sensor...not the EGR.
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