So i got the famous p0400 and Knock Sensor Circuit Malfunction codes... I cleaned my EGR Pipe and it didn't help... anyone have ideas?

 

Join the Max Broken KS Club buddy

 

Is it possible that my EGR Valve needs to be replaced?

 

Start with the cheapest easiest fix and move on up

 

Well i did the cheapest.. clean the EGR pipe... don't really know whats next ?

 

sounbwoy had a great EGR thread that might help:

http://forums.maxima.org/4th-generat...-egr-iacv.html

 

Thanks for the link, i have done all that i cleaned the egr pipe and the opening thats in the plenum to the egr pipe. My guess is these could be the issue:

1. EGR Valve Assembly itself needs to be replaced

2. The Knock Sensor is bad.

I also was reading about measuring resistance of a solenoid related to the egr but i have no idea about that.
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The EGR Volume Control Valve may be tested with an ohmmeter. Disconnect the electrical connector. Looking at the connector half which is attached to the EGRVCV with the latch at the 12 o'clock position you will see two rows of three terminals. The top row is numbered 1-3, right to left. The bottom row is numbered 4-6, right to left. Measure the resistance between these terminal pairs:
2 1
2 3
5 4
5 6
... all resistance values should be 20.9-23.1 ohms at 68 degrees F.

Reconnect the EGRVCV connector halves. Turn the ignition switch ON OFF repeatedly. Verify that the EGRVCV shaft moves smoothly forward backward according to the ignition switch position.

The Exhaust Gas Temperature Sensor may be tested with an ohmmeter. The specifications are ...
- at 32 degrees F, 0.68-1.11 Megohms
- at 122 degrees F, 0.09-0.12 Megohms
- at 212 degrees F, 0.017-0.024 Megohms


Also I Found this Useful when i cleaned the egr pipe.