EGR valve and air temp sensor

[redneckgearhead34]

I got a chance to read the codes my truck is throwing today. I need some help on deciding what to do.

The first code is code 32. This code says the EGR valve is not funtioning. Do i need to replace it? If I dont what affects will it have on my engine perfomance(mpg etc.). BTW a new EGR valve is $90 :(

The second code is code 41. This says my air tempurature sensor is not working. Should I replace it? Also what effects is it having on the performace of my motor. BTW a new air tempurature sensor is $65.

Just so you know my truck is a 1994 Nissan Pickup 2.4L I-4 2wd

[hydrotinkerer]

Are you sure the wires going to the air temp sensor are hooked up? Most of the time the wires are unhooked or broken off the temp sensor.

[redneckgearhead34]

Well when I bought it the check engine light was on(thatsa why I got it fro a deal), it was unplugged and I think a vacuum line was disconnected too. I hooked up both of them and reset the computer. Check engine light is still on and still throws the same codes.

Now that I think about it I never got a chance to look at the underside to see if any wire were broken. I may check it when I get home.

[Scooterdog]

Well when I bought it the check engine light was on(thatsa why I got it fro a deal), it was unplugged and I think a vacuum line was disconnected too. I hooked up both of them and reset the computer. Check engine light is still on and still throws the same codes.

Now that I think about it I never got a chance to look at the underside to see if any wire were broken. I may check it when I get home.

You have INTERMITTENT CODES and HARDFAULT CODES. Which are yours?

[redneckgearhead34]

You have INTERMITTENT CODES and HARDFAULT CODES. Which are yours?

Idk How can I tell?

[Scooterdog]

Idk How can I tell?

Get educated would be a good start.

Love your signature by the way: 1994 Nissan Hardbody 2.4L (start mpg 22) so far no improvement with water4gas cell

:D

[Riddler250]

Get educated would be a good start.

Love your signature by the way: 1994 Nissan Hardbody 2.4L (start mpg 22) so far no improvement with water4gas cell

:D

Why do you have to be rude? he was asking a legitimate question, it deserves a respectful answer, if you arent here to be a productive member, then why dont you leave

[Scooterdog]

Why do you have to be rude? he was asking a legitimate question, it deserves a respectful answer, if you arent here to be a productive member, then why dont you leave

Because he is being a little snot nosed brat in my post. Why would I want to help mister "I have 21 masters degree's, but can't answer a simple question." help him?

[Riddler250]

are you speaking of the "does hho work" thread? i dont think he ever got in on that

[bigapple]

I got a chance to read the codes my truck is throwing today. I need some help on deciding what to do.

The first code is code 32. This code says the EGR valve is not funtioning. Do i need to replace it? If I dont what affects will it have on my engine perfomance(mpg etc.). BTW a new EGR valve is $90 :(

The second code is code 41. This says my air tempurature sensor is not working. Should I replace it? Also what effects is it having on the performace of my motor. BTW a new air tempurature sensor is $65.

Just so you know my truck is a 1994 Nissan Pickup 2.4L I-4 2wd

well the EGR code isn't necessarily the actual piece being broken, but it could be. I replaced one in my brother's F150 and the light is still on, which leads me to believe that the spot where the EGR connects on the intake manifold is clogged. I'd run some Sea Foam through your gas tank and your intake manifold, probably 2 or 3 times.

Hold the can under the hood with a tube from the PCV vacuum port to the inside of the bottle, and have someone start the car. It'll sputter and die (won't take the entire bottle either). Let the car sit for about 30 mins and let the Sea Foam do its work. The car will take a second to turn over, but keep the key turned and tap the gas to make it turn over. Your car will puff out white smoke for about 10 minutes but after that your system is fairly clean and it may help. It's definitely not a magic fix, but its much cheaper than having someone work on it first. Good luck.

[Riddler250]

I love sea foam!!!!

[redneckgearhead34]

I love sea foam!!!!

Is sea foam available at autozone or something of that sort.

[Jaxom]

Advance and O'Reilley both carry it on the shelf. Sea Foam is great stuff.

Big Apple...The 4.6L trucks are notorious for clogged EGR passages. If that's what he has you'll need to pull the intake plenum elbow off the top of the engine to clean them out, as they generally clog where the passage enters the main airflow ~4" behind the throttlebody. The DPFE sensors on those trucks are known for going bad also, and that can cause an EGR code too. The DPFE is sometimes called an EGR position or EGR flow sensor.

Redneck...I've never seen an IAT go bad in a Nissan pickup, every one that I've repaired has had broken wires at the sensor connector under the air filter housing. This is normally cauused by someone pulling up on the filter housing without knowing the sensor is there. Sometimes the wires break inside the insulation and you can't tell just by looking at them. The EGR code could be a bad valve but it's unlikely. Most of the time a vacuum hose is broken or the control solenoid is bad.