P0507 CHEVROLET - Idle Speed High
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
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 replace 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 TahoeChevrolet Factory Service Bulletin OBDII Code P0507
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.
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 PCM
s 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.