ChevyManCam

codes are p0122 (throttle position sensor) and p0507 IAC circuit

Just replaced the MAF sensor, I did have a o2 sensor code but that was fixed when I replaced the cat with a high flow Magnaflow. The MAF code didnt go away until i reset the ecu, A new problem with new codes appeared p0122/p0507. I checked all vac lines and wires all appear to be in good condition.
I bought the car last week, and replaced the plugs, wires, MAF, and cat.
I also cleaned the TB. So im at a dead end here pretty much, and I really dont want to have to spend hundreds at a shop for a 40 dollar part.

fbodyrs96

P0507 - Idle Air Control System RPM Higher Than Expected
OBD-II Trouble Code Technical DescriptionIdle Air Control (IAC) System RPM Higher Than Expected

What does that mean?This P0507 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 P0507 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is greater than the desired (pre-programmed) RPM. In the case of GM vehicles (and possibly others) if the idle speed is over 200 rpm higher than expected, this code will be set.

Potential SymptomsMost likely you'll notice the idle speed is higher than normal. 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.

CausesA P0507 DTC trouble code may be caused by one or more of the following:

A vacuum leak
Leaking air intake after the throttle body
EGR valve leaking vacuum
A faulty positive crankcase ventilation (PCV) valve
Damaged/failed/dirty throttle body
Failed EVAP system
Failed IAC (idle air controller) or faulty IAC circuit
Possible SolutionsThis 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 the intake air system for air or vacuum leaks and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns.

If you have an advanced scan tool that can interact with the car, command the idle higher and lower to see if the engine responds appropriately. Also check the PCV valve to see if it's blocked and needs to be replaced. Check the IAC (idle air controller) if equipped, verify it's operation. If available, try swapping in a new throttle body to see if that fixes the problem. On Nissan Altimas and possibly other vehicles the problem may be fixed by having the dealer perform an idle air relearn procedure, or other relearn procedures.

p0122 just replace it, maybe 5min $20

ChevyManCam

thanks for the quick reply, i believe i may have figured out why im getting the codes, the egr valve is not in proper position, causing high idle, im going to try and adjust it later and ill let you know.