Davidkent
Member
Registered: 2nd Nov 08
Location: Warminster, Wiltshire
User status: Offline
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Hey again guys
Figured while I'm here ill post it all up..
My car has been running off for a while, but its hard to find..
2001 Y vectra 2.2 sri 150
Seems to be pulling in air, when left idling a minute or so, a fault code P0507 comes up, saying the idle is too high..
I can't find anywhere its leaking air though there's a hissing under the bonnet to the right of the inlet
When the code comes on it runs lumpy!
Anything anyone is aware of?
Cheers
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chris_uk
Premium Member
Registered: 8th Jul 03
User status: Offline
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is it the Z22se engine in them?
Idle Air Control (IAC) System RPM Higher Than Expected
What does that mean?
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.
Potential Symptoms
Most likely you'll notice the idle speed is higher than normal. There are potentially other symptoms as well. Of course, when trouble codes are set, the MIL (malfunction indicator lamp, a.k.a. the check engine light) illuminates.
Causes
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
Possible Solutions
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 procedures.
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Davidkent
Member
Registered: 2nd Nov 08
Location: Warminster, Wiltshire
User status: Offline
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Brill mate.
It keeps coming back with P0507 and P0507P whatever that means?
Looks like I have some stuff to take apart!
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taylorboosh
Member
Registered: 3rd Apr 07
User status: Offline
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you not a member on vectra c?
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Davidkent
Member
Registered: 2nd Nov 08
Location: Warminster, Wiltshire
User status: Offline
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I'm on vvoc and vvon, one doesn't work on my phone and the other won't let me post! Lol
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