Can a bad idle air control valve cause a P0700 trouble code on a 2001 Volvo S40?

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This P0507 code is one that's sometimes triggered on vehicles that have electronic throttle control. That is, they don't have a regular throttle cable from the accelerator pedal to the engine. They rely on sensors and electronics to control the throttle. In this case, the P0507 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is greater than the desired (pre-programmed) RPM. In the case of GM vehicles (and possibly others) if the idle speed is over 200 rpm higher than expected, this code will be set. A P0507 DTC trouble code may be caused by one or more of the following: A vacuum leak Leaking air intake after the throttle body EGR valve leaking vacuum A faulty positive crankcase ventilation (PCV) valve Damaged/failed/dirty throttle body Failed EVAP system Failed IAC (idle air controller) or faulty IAC circuit. This DTC is more of an informational code, so if there are any other codes set, diagnose them first. If there are no other codes, inspect the intake air system for air or vacuum leaks and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns. If you have an advanced scan tool that can interact with the car, command the idle higher and lower to see if the engine responds appropriately. Also check the PCV valve to see if it's blocked and needs to be replaced. Check the IAC (idle air controller) if equipped, verify it's operation. If available, try swapping in a new throttle body to see if that fixes the problem. On Nissan Altimas and possibly other vehicles the problem may be fixed by having the dealer perform an idle air relearn procedure, or other relearn procedure

You don't! This is all computer controlled and dependant on a variety of sensors. Let me know if you need anything else.

MOST TIME IF YOU GOT MISFIRE ON ALL CYLINDERS.YOU COULD HAVE AIR LEAK IN INTAKE MANIFOLD.OR PROBLEMS WITH EGR VALVE.ALSO YOU COULD HAVE A DIRTY OR STICKING FUEL INJECTOR AND A BAD COIL OR SPARK PLUG.

well p0700 is a transmission code and the related repair on alldat is a error in tcm module! sounds like a bad computer but i couldn't say unless i tested it myself! sorry for lack of info and the other code was not in the list but there was a 1294 and that is a "target idle not reached" so i would be looking at the throttle body and clean it and make sure nothing is binding and aso vacume leaks throught the motor! good luck

you have problem with idle air control valve and you have to scan for check engine light fault codes

Causes for the car accelerating on its own are:

The cable under the hood that operates the gas is getting stuck.

Throttle pedal stuck.

Idle air control valve faulty.

There is a large vacuum leak.

ECU car computer is faulty.

The most common is the IAC, the repair is not expensive, but the car cannot be driven in this conditions.

Regards.

This is a common issue particularly with vehicles that have had some neglect to the oil change routine. The VVT solenoid on the top of the valve cover gets clogged with thickened or sludged oil.

Replace the VVT solenoid and gasket with a new unit and clear the codes.

your IAC valve, idle air control valve is under the black plastic cover on the front right corner on the engine, remove cover undo valve, renew gasket and re install. ade 13 years volvo tech

YOU MAY HAVE A IDLE SPEED CONTROL VALVE PROBLEM, CLEAN IT FIRST, THEN DISCONNECT THE BATTERY, FOLLOW THE PROCEDURE I HAVE ATTACHED.

Here is the most common cause of this stall and idle speed issues, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.