Question about Toyota Solara

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99 solara 2.2 po505 code replaced iac code still appears. no vaccum leaks. anyone possibly have any suggestions

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  • Expert
  • 47 Answers

Take out the idle air speed control sensor, and clean it. Put it back in and see what happens if it does not make a difference replace it.

Posted on Jan 22, 2013

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Posted on Jan 02, 2017

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SOURCE: front grill on toyota solara

That is correct - it worked for me - now the questions is - How do I remove the old logo ?

Posted on Apr 25, 2009

daves944
  • 1050 Answers

SOURCE: 99 boxter p1128 and p1130. replaced air mass

Remove the MAF sensor and carefully clean the sensing diodes with some solvent and a q-tip. These codes are commonly caused on this car by a dirty MAF that does not see the air entering the engine so fuel is not added by the computer. Then the computer sees that the mixture is lean by looking at the exhaust gas oxygen (sensor) content and it sets a code because it can't trim fuel delivery to the correct level as the MAF signal has more authority.

Posted on Aug 22, 2010

ZJLimited
  • 17970 Answers

SOURCE: actron trouble code PO505 99 acura

P0505 - IAC (Idle Air Control) System Malfunction

The IAC (Idle Air Control) valve controls the idle speed of the engine. At idle the throttle plate is closed, of course. The IAC is computer controlled and allows only a certain amount of air around the throttle plate. This metered air controls the idle speed. The IAC has a "plunger" or "shutter" that moves to open or close the bypass air passageway. The more air the IAC allows around the throttle plate, the higher the idle. The PCM (Powertrain Control Module) uses the IAC valve to keep the idle speed correct with varying engine demands. Can be a three or four wire sensor depending on the model.

The PCM monitors voltages of the IAC circuits and if it detects an incorrect voltage on one or more of the IAC motor circuits it will set P0505. NOTE: Problems with the IAC would only be noticeable at idle or when throttle is closed.

Symptoms may include:
* MIL (Malfunction Indicator Lamp) illumination
* Engine stalls and may not idle unless throttle is depressed
* Intermittently stalls when letting off the throttle
* Engine may idle too high


Potential causes of an P0505 code include:
* IAC motor connector is damaged (check connector and pins for damage, and moisture)
* One or more IAC circuits open or shorted to ground
* One or more IAC circuits are shorted to voltage
* IAC has failed
* PCM has failed


Possible Solutions:
This should be a fairly straightforward diagnosis. Start by clearing the fault codes. Then unplug the IAC and start the engine (This may cause other IAC codes to set. Just ignore them for now). If the P0505 code doesn't reset, replace the IAC. It is internally shorting one of the IAC circuits. If the code DOES return after unplugging the IAC and starting the engine, then you know it isn't the IAC motor. Visually check the wiring harness all the way back to the PCM. You may need to visually inspect the harness by removing all the insulation off the wires. It is possible that the wires could be shorting to eachother or to other wires in the harness.

If there are no wiring problems, and the code keeps returning with the IAC unplugged, you can check the PCM by removing the IAC wires from the PCM connector (or clipping the wires in a location where they can be repaired easily) and then start the engine (If you're not sure, don't do it. Take it to a qualified professional). Now if the code doesn't reset there is a problem with the wiring. Check for continuity on all the IAC wires. Any resistance points to a problem. Check for voltage on any(At this point there shouldn't be any voltages on the wires because they're clipped at one end and unplugged at the IAC). Repair as necessary. But if the P0505 code DOES reset after removing the IAC wires from the PCM connector(or clipping them), replace the PCM, there's a problem internally on the IAC control circuit.

Hope this helps (remember to rate and commene this).

Posted on Jan 06, 2011

johnjnail
  • 1702 Answers

SOURCE: 1994 gmc k1500 sometimes dies when idling and

the code is a 12, it is start of test it should be there, the most common thing on the GMC or any GM product was an idle control valve or motor which ever you want to call it, but you have already tried that. so the next most common thing was the pick up assembly inside the distributor the magnets get week an when the RPM gets slow the pick up is unable to read the magnetic pulse and when this happens the on board computer system thinks the engine stalled so it shuts off the injectors and then the engine stalls for real.

try replacing the distributor with a re-built one, the problem is so common that most auto parts stores keep them in stock.

Posted on May 26, 2011

emissionwiz
  • 76673 Answers

SOURCE: 1999 dodge durango 5.2l code po505

P0505 - Idle Control System Malfunctionxicon.jpghttp://engine-codes.com/p0505.htmlForum CodePossible causes- IACV-AAC valve harness is open or shorted
- IACV-AAC valve poor electrical connection
- Faulty IACV-AAC valve

Read more: http://engine-codes.com/p0505.html#ixzz1zVJIt34L

Posted on Jul 02, 2012

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1 Answer

What is the code p0507


by what the forums say this seems to be a common problem. Before you go replacing stuff, I'd check vac hoses real close, and connections to the throttle body(and see if the throttle place is nice and tight) and IAC, maybe get some contact spray and spray the connections to make sure they are working. The checklist is:
Explanation:
The ECM has detected that the IAC counts are higher or lower then expected, the engine speed is not in its expected range

Probable Causes
1 - Vaccum leak on engine
2 - Dirty throttle body
3 - IAC motor defective
4 - Poor electrical connection to te TAC value

May 14, 2014 | 2003 Kia Sedona

1 Answer

Car won't idle


First if the "service engine" light is on I would have a local retailer or garage see what the codes are. For possible TPS, IAC, or mass air flow problems. TPS being "throttle position sensor" IAC being "idle air control" If a light is not currently present, listen under the hood for a hissing noise or signs of a vaccum leak.

Feb 13, 2014 | 2005 Chevrolet Monte Carlo

1 Answer

Vaccum leak/torque converter engine code


I would need the actual code to give a comment. I doubt a vac leak would cause a torque converter code.

Jul 02, 2013 | 1988 Buick Electra

1 Answer

Nissian path finder 2000 code p0505


That is idle air control (IAC) system malfunction,it's causes may include:
IAC motor connector is damaged (check connector and pins for damage, and moisture);
One or more IAC circuits open or shorted to ground;
One or more IAC circuits are shorted to voltage;
IAC has failed; or PCM has failed
You can clearing the fault codes. Then unplug the IAC and start the engine. If the P0505 code doesn't reset, replace the IAC. It is internally shorting one of the IAC circuits. If the code DOES return after unplugging the IAC and starting the engine, then you know it isn't the IAC motor. Visually check the wiring harness all the way back to the PCM. You may need to visually inspect the harness by removing all the insulation off the wires. It is possible that the wires could be shorting to eachother or to other wires in the harness.

Hope this helpful.
greetings

Plus: DTC table click here.

Nov 10, 2011 | 2000 Nissan Maxima

1 Answer

Po505 idle control system malfunction what is that


Possibly the Idle Air Control (IAC) system is not functioning properly. The computer gets input from the air conditioning pressure switch, the power steering pressure switch, and the electrical load detector. The computer calculates the total load on the engine and sends a signal to the IAC to correct for it. One of the load detectors may be bad or the IAC may be malfunctioning. The computer could also be at fault but that would be very rare.

Feb 28, 2011 | 2001 Toyota Sequoia

2 Answers

Actron trouble code PO505 99 acura


P0505 - IAC (Idle Air Control) System Malfunction

The IAC (Idle Air Control) valve controls the idle speed of the engine. At idle the throttle plate is closed, of course. The IAC is computer controlled and allows only a certain amount of air around the throttle plate. This metered air controls the idle speed. The IAC has a "plunger" or "shutter" that moves to open or close the bypass air passageway. The more air the IAC allows around the throttle plate, the higher the idle. The PCM (Powertrain Control Module) uses the IAC valve to keep the idle speed correct with varying engine demands. Can be a three or four wire sensor depending on the model.

The PCM monitors voltages of the IAC circuits and if it detects an incorrect voltage on one or more of the IAC motor circuits it will set P0505. NOTE: Problems with the IAC would only be noticeable at idle or when throttle is closed.

Symptoms may include:
* MIL (Malfunction Indicator Lamp) illumination
* Engine stalls and may not idle unless throttle is depressed
* Intermittently stalls when letting off the throttle
* Engine may idle too high


Potential causes of an P0505 code include:
* IAC motor connector is damaged (check connector and pins for damage, and moisture)
* One or more IAC circuits open or shorted to ground
* One or more IAC circuits are shorted to voltage
* IAC has failed
* PCM has failed


Possible Solutions:
This should be a fairly straightforward diagnosis. Start by clearing the fault codes. Then unplug the IAC and start the engine (This may cause other IAC codes to set. Just ignore them for now). If the P0505 code doesn't reset, replace the IAC. It is internally shorting one of the IAC circuits. If the code DOES return after unplugging the IAC and starting the engine, then you know it isn't the IAC motor. Visually check the wiring harness all the way back to the PCM. You may need to visually inspect the harness by removing all the insulation off the wires. It is possible that the wires could be shorting to eachother or to other wires in the harness.

If there are no wiring problems, and the code keeps returning with the IAC unplugged, you can check the PCM by removing the IAC wires from the PCM connector (or clipping the wires in a location where they can be repaired easily) and then start the engine (If you're not sure, don't do it. Take it to a qualified professional). Now if the code doesn't reset there is a problem with the wiring. Check for continuity on all the IAC wires. Any resistance points to a problem. Check for voltage on any(At this point there shouldn't be any voltages on the wires because they're clipped at one end and unplugged at the IAC). Repair as necessary. But if the P0505 code DOES reset after removing the IAC wires from the PCM connector(or clipping them), replace the PCM, there's a problem internally on the IAC control circuit.

Hope this helps (remember to rate and commene this).

Jan 06, 2011 | 1996 Acura TL Series

3 Answers

When engine gets hot, idle is up and down with the engine light on. OBD code gives a P0505 code.


per this address "http://www.obd-codes.com/trouble_codes/" p0505 is a "IAC (Idle Air Control) System Malfunction" it gives some good suggestions to look at to find a solution for your problem.

Dec 14, 2010 | 2002 Honda Odyssey

1 Answer

Constant 2000-2500 rpm idle


possibly have a engine vaccum leak , dirty throttle body or bad iac ( idle air control motor, first look for obvious vaccum lines broken or off

Aug 27, 2010 | 1995 Mitsubishi Mirage

2 Answers

Idle goes up to 2000rpm then fluctuates to 1500 to 2000 then when operatin temp idles to 900


This sounds like a faulty idle air control valve (IAC). A leaking vacuum line could also cause these symptoms. Check for vaccum leaks, and then for faulty connections at the IAC. It is located near or in the throttle body. If no leaks are found, disconnect wiring to IAC. If behavior is the same with IAC disconnected, the IAC probably needs replacement. Sometimes they can be cleaned, but this usually doesn't help for long. You can probably also get resistance specs for the IAC from the dealer and check the IAC resistance with a ohmmeter to see if it is OK. If the IAC is OK and there are no obvious vac. leaks, you might have an intake manifold leak. This can be tested by aiming an UNlit propane torch at the base of the intake at different points with engine running. If the idle increases in response, the intake is probably leaking. This is unusual on Hondas/Acuras, though.

Dec 12, 2009 | Acura TL Cars & Trucks

1 Answer

Po505


P0505 Idle speed control system malfunction.
Possible faults are:wiring,ISC actuator/IAC Valve, throttle motor,throttle valve tight/sticking, ECM

Apr 08, 2009 | 1995 Dodge Neon

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