Question about 2002 Chevrolet Blazer

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PO507 the iac counts are higher

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Check for proper fuel pressure, then look for any small vacuum leaks. the computer has gone past it's adaptability range under some circumstances when driving and that's what causes the code

Posted on Jan 23, 2015

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Posted on Jan 02, 2017

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Code po507 came up on my 2000 Buick century. Service engine light flashes when I accelerate and vehicle runs rough. Any help diagnosis on this?


That has to do with your idle air control valve (IAC). It is controlled by the pm and more diagnostic tests are needed to narrow down exactly where the problem lies. Check all wiring and connection to IAC and pcm 1st.

Dec 22, 2016 | 2000 Buick Century

3 Answers

COULD THE GAS PEDAL CABLE CAUSE THIS CODED PO507 to be high


Extracted from Engine-Codes.com

Code P0507

Possible causes

- Dirty throttle body

- Electric throttle control actuator misadjusted or damaged

- Faulty Electric throttle control actuator

- Intake air leak

- Poor electrical connection to the Intake Air Control (IAC) valve


help.jpg What does this mean?

Tech notes

If there are no intake leaks, clean throttle body, adjust engine idle and erase engine code. If the code comes back you may have to replaced the Electric Throttle Control Actuator (Motor) to repair the problem.



There is a factory service bulletin for the following Chevrolet models:



2006-2008 Chevrolet Trail Blazer

2007-2008 Chevrolet Avalanche

2007-2008 Chevrolet Express

2007-2008 Chevrolet Silverado

2007-2008 Chevrolet Suburban

2007-2008 Chevrolet Tahoe

Chevrolet Factory Service Bulletin OBDII Code P0507


What does this mean?

When is the code detected?

Thi P0507 code sets when the Powertrain Control Module (PCM) detects an engine speed outside of the Idle Air Control (IAC) valve range of control.

Possible symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

- Engine hard to start

- Rough or erratic idle speed

P0507 Chevrolet Description

The Idle Air Control (IAC) valve is a Powertrain Control Module (PCM) controlled stepper motor located on the throttle body. The stepper motor drives a valve pintle which protrudes into a passage that bypasses the throttle plates. The PCM commands the IAC valve pintle to extend to decrease the idle speed. The bypass air flow is reduced and the idle speed decreases as the pintle approaches its seat. The PCM retracts the IAC valve pintle away from its seat to increase the idle speed. The retracting of the IAC valve pintle allows more air to bypass the throttle plates. One of the PCMs uses for the IAC system is to maintain a desired idle speed. This DTC sets when the PCM detects an engine speed outside of the IAC\'s range of control.





Read more: http://engine-codes.com/p0507_chevrolet.html#ixzz3ObdI2chF

Jan 11, 2015 | 2001 Chevrolet Blazer

1 Answer

What is the code p0507


by what the forums say this seems to be a common problem. Before you go replacing stuff, I'd check vac hoses real close, and connections to the throttle body(and see if the throttle place is nice and tight) and IAC, maybe get some contact spray and spray the connections to make sure they are working. The checklist is:
Explanation:
The ECM has detected that the IAC counts are higher or lower then expected, the engine speed is not in its expected range

Probable Causes
1 - Vaccum leak on engine
2 - Dirty throttle body
3 - IAC motor defective
4 - Poor electrical connection to te TAC value

May 14, 2014 | 2003 Kia Sedona

1 Answer

2005 sentra trouble code po507


P0507 - Idle Air Control System RPM Higher Than Expected

Could be vacuum leak, dirty throttle body, faulty IAC

Jan 06, 2012 | Nissan Sentra Cars & Trucks

1 Answer

I have the po507 code on my nissan quest .. it is this


this obd2 trouble code table can help you understand the meaning of code.
for p0507, you can try this:

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.

Aug 11, 2011 | 2004 Nissan Quest

1 Answer

Engine Light On


If you notice idle getting too low, or car stalling on turns, or when AC /heater is on etc, (engine under load) then yes, probably IAC motor is defective, or dirt in the seat area of it. Only thing to be aware of, is it might stall when off the gas, so be careful when turning, and/or stopping. Have it looked at first chance, but it shouldn't hurt vehicle, just be cautious driving when you let off the gas, it could stall.

Nov 19, 2009 | 2005 Dodge Stratus

1 Answer

Chevy S-10 p0300 and po507


if it is reving at idol I would be checking my throttle body for air leaks your computer will tell your engine to loop higher, to try and correct the readings it is getting.

Nov 17, 2009 | 2002 Chevrolet Blazer

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