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How do you adjust the idle speed on a 2006 Chrysler sebring?

You generally cannot adjust the idle speed on a 2006 Chrysler Sebring (or most modern vehicles) in the same way you might on older cars with a manually adjustable idle screw. The idle speed is controlled by the Powertrain Control Module (PCM) – the car's computer. The PCM uses various sensors (like the throttle position sensor, mass airflow sensor, and coolant temperature sensor) to determine the appropriate idle speed.

If your Sebring's idle speed is too high or too low, the problem likely lies within the system the PCM uses to control the idle, rather than a simple adjustment. Possible causes include:

* Dirty or faulty throttle body: A dirty throttle body can affect the sensor readings, leading to incorrect idle speed. Cleaning it might solve the problem.

* Vacuum leaks: Leaks in the intake system can disrupt the air/fuel mixture, affecting idle.

* Faulty sensors: Problems with the sensors mentioned above (TPS, MAF, coolant temperature sensor) can cause inaccurate readings and incorrect idle speed.

* Faulty Idle Air Control (IAC) valve: This valve regulates the amount of air entering the engine at idle. A malfunctioning IAC valve is a common cause of idle problems.

* PCM issues: In rare cases, a problem with the PCM itself might be the culprit.

Instead of trying to adjust the idle speed directly, you should:

1. Check the engine for any obvious issues: Look for vacuum leaks (listen for hissing sounds), loose hoses, or anything out of the ordinary.

2. Have the throttle body cleaned: This is a relatively easy and inexpensive procedure that often resolves idle issues. You can attempt this yourself (plenty of YouTube tutorials are available), but be careful and use the proper cleaner.

3. Have a diagnostic scan performed: A mechanic with a scan tool can read the PCM's trouble codes (DTCs), which will pinpoint the source of the problem. This is the most efficient way to diagnose the issue.

Attempting to manually adjust the idle speed without understanding the underlying cause will likely not resolve the problem and could even damage your engine. It's best to let a qualified mechanic diagnose and repair the issue.

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