Q: Code p0505

asked by on

My car has a cel on with code p0505. I tried replacing Iac valve. But the code is still keep coming. So then could be the problem with it?

My car has 120000 miles.
My car has an automatic transmission.

A: For the P0505 code, you should make sure th...

For the P0505 code, you should make sure that the PCV valve is clean or you should have the valve replaced. The throttle idle valve should be removed and throttle plates and IAC passages cleaned out. Make sure there is not vacuum leaks or problems from the MAF to the throttle body. Clear codes, disconnect battery for 10 minutes and then reconnect and have the computer relearn the idle speeds. If the trouble persists, have an expert come and diagnose the Check Engine Light more thoroughly. From there, they will be able to move forward with the appropriate repairs.

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Changed VANOS Solinoid-Mechanic Wants to Replace Entire Engine

It's entirely possible that there is an engine problem. The VANOS system is BMW's take on variable valve timing, and if your car is a regular Mini Cooper, not the Cooper S model, then it has double VANOS and uses...

Q: Oil leak

The timing chain tensioner fix is a common issue with this vehicle. There are several possibilities as to where this leak may be coming from. Crank seal and valve cover gasket are two others I would recommend checking. I would...

Q: Failed emissions after P0505 code... Considering options

The mechanic that checked your vehicle is giving you a possible fix by cleaning the throttle body of built up carbon. This may help with the idle and P0505 code, and for passing the emissions test. The throttle body is...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...