I have a 2006 saturn ion 2.2 that is throwing code P0506 and my mechanic told me to replace the IAC sensor but I can not find that sensor for sale. I have seen (throttle body repair kits) but they ar

check / replace the crank/ cam positions sensor and check the wiring/maf sensor
simply resetting with fixing will not fix the fault

https://www.yourmechanic.com/question/where-is-the-cam-position-sensor-located-in-a-2006-saturn-ion-2-2-2l-by-bill-s
This is for 03
https://www.youtube.com/watch?v=YytUAq9kYjQ

Both codes are for a problem with the same O2 sensor. Code 31 is for the sensor signal staying on "lean" and code 135 is for a problem with the heater circuit for the sensor. Replacing the sensor may take care of both codes. It could also be a wiring problem.

DTC P0506 refers to the actual engine idle speed not being within range of the commanded engine idle speed. If there are any other DTCs present those must be fixed first.

This can be caused by an ISC (Idle Speed Control) motor sticking.

Other possible causes of this code are:
- incorrect TCC (Torque Converter Clutch) operation
-accessories that require additional engine torque to operate - including amplifiers, security systems, etc. that can cause additional electrical load.
- Restricted exhaust system
-any other mechanical problem that may affect engine speed.

There will be an O2 sensor before the catalytic convert and one after the catalytic converter.

On a four cylinder the one before the cat will be Bank 1 Sensor 1. The one after the cat will be Bank 1 Sensor 2.

Do you have a trouble code for an O2 sensor?

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

P0506 - Idle Air Control (IAC) System RPM Lower Than Expected

What does that mean?
This P0506 code is one that's sometimes triggered on vehicles that have electronic throttle control. That is, they don't have a regular throttle cable from the accelerator pedal to the engine. They rely on sensors and electronics to control the throttle. In this case, the P0506 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is lower than the desired (pre-programmed) RPM.

Potential Symptoms: Most likely the only thing you'll notice is the idle speed is lower than normal so it will likely be rougher. There are potentially other symptoms as well. Of course, when trouble codes are set, the MIL (malfunction indicator lamp, a.k.a. the check engine light) illuminates.

Causes: A P0506 DTC trouble code may be caused by one or more of the following:
* A vacuum leak
* An air restriction in the intake air path or exhuast
* A faulty positive crankcase ventilation (PCV) valve
* Damaged/failed/dirty throttle body
* Internal engine problem
* Failed PCM

Possible Solutions:
This DTC is more of an informational code, so if there are any other codes set, diagnose them first. If there are no other codes, inspect for vacuum leaks, restrictions, and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns.

Other related DTCs: P0507

i just had the same issue . . .I have been having starting problems with my car (2006 Saturn Ion) and smelling gasoline. It turns out the hose connected to the fuel pump was cracked and leaking gas. The mechanic said that this is a safety issue and should be recalled. He feels that the one hose is not connected and harnessed properly and the vibration to the hose eventually caused the crack. I googled "Saturn 2006 Ion fuel leak" and several other people have had the same issue. What is also the major problem here is that the hose is configured with the fuel pump itself. So, the entire mechanism had to be replaced. It cost me 700.00 for a cracked hose because the fuel pump had to be replaced and my car only is 46,000 miles. This is a major safety issue. I drove for 2 weeks with a car that was leaking fuel. Saturn must know about this and is waiting for the same situtation to happen, but for the car to blow up instead. PLEASE IF YOU ARE READING THIS CAUSE YOU HAVE THE SAME ISSUE . . . . contact the office of defects and the NHTSA . . .This is a saftey issue and a recall needs to be in affect . . .

Misnikie32 . .. I just had the same problem around the time you figured out your problem and I just got it fixed yesterday. For almost 3 weeks I had starting problems and I constantly smelled gas. The problem is a safety issue and the car needs to be recalled. The hose that is connected to the fuel pump is cracked. Since the hose is incorporated with the fuel pump, the entire mechanism needs to be changed. Look at spending about 700.00 . I informed saturn and told them my life was at danger. Please contact them on their website and goto your state's attorney general and launch a complaint, as well as the office of defective investigations and the NTSAB (google them). This needs to be brought to their attention and all owners of this car. I googled this and many other people are having this problem. Some are even on this forum. PLEASE DO THIS ! ! ! !

The engine idle speed is controlled by the computer through the Idle Air Control (IAC) valve mounted on the throttle body. The valve may be faulty. Hope this helps and best wishes.

you can take it to your mechanic. you might have to replace the entire radio set though