Extracted from Engine-Codes.com
- 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 What does this mean?
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.
- 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.
Read more: http://engine-codes.com/p0507_chevrolet.html#ixzz3ObdI2chF