EGR Valve Temperature Sensor unplugged
 

Hi all! I'm new here.
I bought a 1999 Camry in January and it's been having terrible gas mileage. It has been reporting the P0401 OBD-II Trouble Code, Insufficient EGR Flow. I go to remove the EGR pipe to clean it and find the EGR Valve Temperature Sensor unplugged!
http://1aauto-images.s3.amazonaws.co...0028/large.JPG

However, I cannot find where the wire should plug into. It's got a two-prong male plug. Could anyone please help me locate its socket?

Thank you in advance.

What engine does the car have, V-6 or 4-cylinder?

3.0l v6
 

3.0L V6 Manual non-California, manufactured in Kentucky.

The harness comes from the cylinder head side nearest the radiator.

It should be on the drivers side of the EGR vacuum hose and run parallel to it.

Wire colors are green/Yellow and brown.

Eureka!
 

I found the temp sensor socket!
http://paladolphin.com/imgs/EGR_Temp...ocketFound.jpg
I had to remove all these air parts:
http://paladolphin.com/imgs/EGR_Temp...ketAirFlow.jpg
It's so strange, because I examined the socket next to it several times, but didn't see it until I removed the box on the right side of the photo. What is that, BTW?

Thank you for your help. I couldn't have found it without your help. I was getting very frustrated and wasn't sure what I was going to do.

Air baffle? Your throttle body looks like it could use a clean too:)

Clean throttle body
 

Yes, I cleaned the opening. I don't understand where the grease came from.

Great job! Glad to help.

The grime is most likely from the engine. The PCV system has a hose running from one valve cover to the large air intake hose. This routes internal engine gases into the engine to be burned.

Some grime is normal. There are numerous internet posts on how to clean the throttle body. Use only chemicals designed for throttle body cleaning (safe for plastics) as the IAC valve is plastic.

Thanks!
 

:D

I'll note that. Is MAF cleaner one of them?

Can use MAF cleaner as safe for plastics.

Spray it on, let it soak a little, then scrub what you can with a tooth brush, etc. Wipe off grime with paper towel, etc.

Once clean as possible, start engine and get what is left using spray having engine suck in fluid and grime. Engine will bog down with spray thus give it some gas via the throttle pulley.

Can also clean the IAC valve, the intake is rectangle opening ahead of throttle plate.

Lots of internet posts on cleaning throttle body and IAC valve.