O2 sensors, Knock sensor, EGRC Solenoid Valve

[bobrep]

On my Nissan Maxima SE'95 I had Check Engine Light couple days ago.The ECU code was 1005. I just reset the ECU and today the light is on again. Now I have 4 codes:
0303 - Front Left Heated O2 Sensor;
0304 - Knock Sensor;
0503 - Front Right Heated O2 Sensor;
1005 - EGRC Solenoid Valve.

What should be replace? Will problem be resolved when I replace sparcks? HELP ME PLEASE.

[THT]

Replace your O2 sensors first then the KS code will most likely go away.

~THT

[bobrep]

Originally Posted by bobrep

On my Nissan Maxima SE'95 I had Check Engine Light couple days ago.The ECU code was 1005. I just reset the ECU and today the light is on again. Now I have 4 codes:
0303 - Front Left Heated O2 Sensor;
0304 - Knock Sensor;
0503 - Front Right Heated O2 Sensor;
1005 - EGRC Solenoid Valve.

What should be replace? Will problem be resolved when I replace sparcks? HELP ME PLEASE.

Thank you very much. Should I replace EGR Solenoid Valve first and after the O2 sensors?

[THT]

EGR probably needs a cleaning is all; have you ever cleaned it?

~THT

[bobrep]

Originally Posted by THT

EGR probably needs a cleaning is all; have you ever cleaned it?

~THT

No, I have never cleaned it. It's very hard to locate that valve. Where is it? I checked the "Nissan Maxima 1993-98 Repair manual" (ISBN#0801989612 )and there is no word about that valve. There is information about engine VE30DE. My Maxima has VQ30DE (Maxima'95).
Even on page 4-30 the image of the engine and the name of it are switched. So, it's very hard to use that manual for VQ30DE engine. Please, provide me more information where it is and how to clean it if it's not hard for you.

THANK YOU VERY VERY MUCH!!!!!

[THT]

Look under "Exhaust gas recirculation"; found it in my Haynes manual in thirty seconds. I'd scan it but my scanner's out of commission. And if the cleaning doesn't do it, replacing the solenoid should take care of your problem.

~THT