Rough to start, then OK. Tried new air filter, new toyota brand spark plugs, changed oil with synthetic, Lucas oil treatment, new toyota gas cap, fuel cleaner twice, throttle body cleaning, new battery. Had a diagnostic and they recommended new IAC valve, which was changed. Light still on, still rough start. Now they're saying it could be something electrical. It will need a new timing belt/water pump soon. Should I continue to put money in it? I've already spend $750 and electrical problems could be simple or endless. Computer problem? It was down 2 qts. of oil when the light first came on. Someone also said that a wrench could have touched the positive terminal on the battery causing this. They said they tested for vacuum leaks. Any ideas on how to fix this?99 Toyota Camry 90K Miles Check Engine Light Code P0505 Idle Control Malfunction?
PO505 is idle control SYSTEM malfunction. The %26quot;MEKANIK%26quot; needs to get the idle control diagram and see what it consists of. I would suggest cleaning the maf or map sensor ( whichever you have) very carefully with some contact cleaner in a spray can. Do not touch the sensor as it is quite delicate. Nothing I can see in your list of repairs, except maaybe the iac, has anything to do with the problem. I think you need a shop with some know how. Stay away from dealers.99 Toyota Camry 90K Miles Check Engine Light Code P0505 Idle Control Malfunction?
if you have a code stored in the computer the car can ignore the information from a sensor and go to another sensor to get a rough estimate of what that first sensor should be reading. if you replace a failed sensor the computer still sees a bad sensor fro a total of 40 completed drive cycles with out the problem. given this much information, i would see f you can not find a way to barrow a scanner to erase the codes and/or read the codes and see of anything changes.
