Skip the auto shop - Our mechanics make house calls

Q: I have an engine light code P0507. It says that there is a high idle issue with my vehicle.

asked by on

I am getting the error code above. IAV relearn will not hold per the mechanic I took it to, and SES light keeps coming on. I read that a worn, but not faulty, power steering pressure switch could be a cause for a high idle. The reason I am investigating this as a possible solution for me is that when I bought the car, the P/S pressure hose was leaking to the point that the reservoir was constantly empty. I changed out the hose, and the leak is gone. I did not change out the P/S pressure switch. I have taken it into a mechanic, and after he tried the relearn multiple times with a consult computer, he gave up and told me to take it to Nissan. Have you heard of the pressure switch causing high idle before on a 04 Maxima? If the TB is clean and vacuum hoses are good, is this the likely culprit, before I go to the ECU? Or could there be something else?

My car has 175000 miles.
My car has a manual transmission.

Hi there. The code P0507 means that the idle air control valve (IAC) is registering a higher rpm than normal. Check all of the vacuum lines to the engine. A small vacuum leak will cause the engine rpm to be higher than normal.

If the vacuum lines are in good shape and there are no leaks, then check the IAC for a voltage read out. You will need a digital volt meter and a back probe pin. Put the back probe pin into the wiring harness put the volt meter on the pin. Register what the voltage is reading. If the voltage output is near the voltage input, then the IAC needs replaced.

If the voltage is low and when you throttle the engine the voltage goes up, then you will need to check the mass air flow sensor (MAF). Check to see if the MAF is dirty or oily. If the sensor is dirty, then I suggest replacing it with a new sensor.

Check the power steering pressure switch for power to it and if the switch is working.

If all of the sensors and switches are reading good and there is no problems with them, then I recommend having the computer flashed (reprogrammed) or replaced.

If you need further assistance troubleshooting your vehicle, then seek out a technician, such as one from YourMechanic, that can assist you with your engine light being on and the idle being higher than normal.

Was this answer helpful?

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
  • Home
  • Questions
  • I have an engine light code P0507. It says that there is a high idle issue with my vehicle.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Power steering cutting out

Hi, first I would recommend checking the fluid level under the hood and make sure the level is correct. If you are low on fluid, it can create pockets of air, causing a loss in power steering as you turn...

Q: Blend door is stuck

The blend door in your SUV is controlled by an electric actuator. If the blend door itself is stuck, the actuator will still attempt to move it. However, the actuator itself is usually to blame. It will need to be...

Q: Idle issues or MAF sensor? 2001 Nissan Maxima

The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine. This valve is controlled by the vehicle's computer which will adjust idle speed based upon other measurements such...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.