Question about 2007 Subaru Legacy 2.5i SE Sedan

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Code p0506 subaru after disconnecting battery

Changing headlight meant I had to remove battery. Afterward idling rough and a p0506 check engine code appeared.

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Often when disconnecting the battery the engine control computer 'forgets' the existing parameters for idle speed and such. The DTC that you are showing indicates that the idle speed is lower than expected. I have found that erasing the code with an OBD reader and then putting about 25 miles or so on the car will correct the low idle as that allows the engine control computer to bring the operating parameters up to date again as they were before you removed the battery.

Posted on Jun 06, 2016

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 2003 Subaru Outback check engine light stays on

You may have to take it to a shop and have them connect their OBD tool to the computer and clear the deep memory. If you have a code left in the deep memory it can reapear like that. Good luck. Please rate me so I know how I'm doing. Thanks.

Posted on Dec 30, 2008

keithheavili
  • 410 Answers

SOURCE: idle malfunction

You need to replace your idle air controller (IAC). IAC basically opens and closes the throttle at idle so it stays at constants RPM.  Hope this helps.  Thanks for an honest rating and for using FixYa.

Posted on May 19, 2009

  • 41 Answers

SOURCE: 2002 Subaru outback was idling rough and sometimes

Could be the Idle Control Valve?

Posted on Jul 06, 2009

motor1258
  • 6674 Answers

SOURCE: 2004 subaru forester, 99,000 miles. Check engine

Drop in to an Autozone, or Pep Boys, or similar big parts store & they will usually scan for codes free. This will hopefully eliminate all the guess work, or at least point everyone in right direction for better diagnosis. If not obvious from codes what the problem is, get back to us and we'll help you out.

Posted on Aug 23, 2009

Testimonial: "Thanks for the great suggestion . I'll have Autozone read the codes on Monday. Thanks again!"

  • 105 Answers

SOURCE: check engine light flashing - engine idles roughly

the car should be OBD 2 compliant. therefore run a scan on it to find out exactly wot the problem is

Posted on Oct 11, 2009

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Code p0506


Check Engine light Code P0506 Throttle Body Idle Air Control (IAC) System RPM Lower Than Expected, Do not waste your money Solve the problem of code Throtte Body P0506 with three dollars video Part #1 Remove Throttle Body

Oct 23, 2013 | Cars & Trucks

2 Answers

Help! I have a 2004 Ford Explorer XLT Sport, V8.


try disconecting the battery for about 40min and leave the key in the on position while its disconected, turn off the key and reconnect the battery this will reset the ecu and may help your problem good luck and please rate

Aug 01, 2011 | 2004 Ford Explorer

1 Answer

P0506


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

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.

Jun 20, 2011 | 2001 Saturn L-Series

2 Answers

Idols rough won't go when giving gas. Dtc codes PO300,PO308, and PO316 what should I fix


Change the fuel filter and drive it about 30 miles. it should reset the codes to normal.

Feb 22, 2011 | 2004 Ford Explorer

1 Answer

I replaced the alternator belt and battery. Now it is idleing different. It shows code P0506. I have checked the hoses and connections and I cannot find anything bad. What should I try next?


Hi:
Here is info on your code:

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


The first thing to do is clear the code and see if it comes back, and if it does, work your way thru the list of possible causes.

Sep 09, 2010 | 2005 Ford Mustang

1 Answer

P0506 on 2003 expedtion


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

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.

Hope helps.

Jul 31, 2010 | 2003 Ford Expedition

2 Answers

Would like to know what code 506 means on my 04 f150all i did was change my battery and check engine light came on truck started to stall and run ruff is there a reset sequence i need to go through? please...


P0506--idle air control system rpm lower than expected--check around where battery was replaced may have damaged or knocked loose a vacuum line- possible dirty throttle body clean throttle body check for restriction in intake air tube also clean" iac"---possible faulty pcv valve fix or replace if necessary--good luck

Jan 27, 2010 | 2004 Ford F150

3 Answers

Rough idle w/check engine ligth on. Showing a P1684 error code.


your code doesn't help your rough idle,
P1684=The battery has been disconnected within the last 50 starts

Dec 28, 2009 | 2001 Dodge Stratus

2 Answers

Engine error code


Here;s a list of Ford Error codes I don't see your code though.
p1506 is Idle Air Control Over Speed Error,

http://www.obd-codes.com/trouble_codes/ford/

May 11, 2009 | 2005 Ford Expedition

1 Answer

Engine will start and rough idle but dies when either the brakes are applied or the lights are turned on!


have you checked out your fuel filter? I had my 2003 denali do the same type of problem and it turned out to be a very dirty fuel filter.

Sep 02, 2008 | 1998 GMC Sierra

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