cant fix CODE P0507

[leloncio]

Hi Folks

I cant fix the code P0507. (Idle Control System RPM Higher Than Expected)

Checked in two repair shops, they checked IAC valve, Throttle Body, fixed a couple of Vaccum Leaks. But the check Engine with this code appears again.

When Idle (Normal temp) in Drive the RPMs are about 650-700 RPMs, changinf to Neutral or Park changes the RPM to aprox 1000 RPM.

I have several months trying to fix this. What else can be?

Thanks in advance

[95naSTA]

You say the shop checked the IAC, was it ever replaced?

Was the throttle stop screw moved at all?

[leloncio]

You say the shop checked the IAC, was it ever replaced?
A=IAC Valve was not replaced.

Was the throttle stop screw moved at all?
A= I dont know, they cleaned the throttle body but they didnt told me anything regarding the stop screw

[95naSTA]

I would replace the PCV valve and if that doesn't work try a new IAC.

[leloncio]

Tnx. Will try

[leloncio]

Hi folks

I changed the pcv and run the car for 1 week. Today the check engine light turned off.

Hope pcv fixed the problema

[leloncio]

Hi.

Unfortunately the code was shown again.
RPM on P or N are about 1100rpms.

Could be the IAC?

thanks