Question about Toyota Solara
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
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
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
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
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
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
P0505 - Idle Control System Malfunctionhttp://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
Tips for a great answer:
May 14, 2014 | 2003 Kia Sedona
Feb 13, 2014 | 2005 Chevrolet Monte Carlo
Nov 10, 2011 | 2000 Nissan Maxima
Feb 28, 2011 | 2001 Toyota Sequoia
Jan 06, 2011 | 1996 Acura TL Series
Dec 14, 2010 | 2002 Honda Odyssey
Dec 12, 2009 | Acura TL Cars & Trucks
Nov 20, 2017 | Toyota Cars & Trucks
78 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: