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1995 Infiniti G20 Base 4dr Sedan Luxury Sports 5-Spd

1995 Infiniti G20
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February 17, 2011, 11:56 am

 
 

Question: Need help with OBDII Codes and Cost Range to Fix

PO 325 Knock Sensor

PO 505 Idle Air Control

O2 Sensor's Replaced front and rear.

Is the Knock Sensor replacement an easy fix?

Also the Idle Air Control....?? Easy?

I would appreciate instructions if they are easy fix's


February 20, 2011, 9:25 am

Tyler O
Expert Mechanic

New knock sensor is listed at $190, labor time is 1.8 hours to replace.

I would clear the codes first and see what comes back.

The idle control motor might just be a loose connection if it's idling fine. They can also sometimes just be removed and cleaned up rather than replaced.


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February 20, 2011, 11:49 am

 
 

yea thanks a lot but if worse circumstance how much could the idle control motor cost me with labor? The idle control is out of whack cause I have to pump the accelerator while starting. Like as I turn the key I have to give it some gas then let off. The rpms go up and down. Thanks


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February 20, 2011, 12:54 pm

 
 

but after 30 seconds running the idle goes back to normal and I don't have any problems. It runs smooth once warmed up.


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February 21, 2011, 10:05 am

Tyler O
Expert Mechanic

You need to do an intake leak test. You might have some vacuum leaks causing the idle issue. Once you are SURE that you have no intake leaks, then I would think about replacing the idle air control motor.

Most shops use a smoke machine that can push smoke and pressure into the intake to easily find even the smallest leak.

If you really need the idle air control motor, expect to pay $300+ for a new one. Maybe try a junkyard part first.


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February 21, 2011, 10:08 am

 
 

thanks that could be the problem cause i have a ram air intake installed


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