Look for a vacuum leak...
Code P1506 - Idle air control valve over speed error
Idle air control over speed
If error code P1506 is not fixed, it can lead to issues with the idle speed control system of the vehicle. This can cause symptoms like high or low idle speed, engine stalling, and poor acceleration. It is important to address this issue promptly to ensure the proper functioning of the vehicle and prevent further damage.
To fix error code P1506 on a 1998 Ford Expedition with a 5.4L engine, start by inspecting the Idle Air Control (IAC) valve for dirt or malfunction; cleaning or replacing it may resolve the issue. Check for vacuum leaks in hoses and connections, as they can affect idle speed. Additionally, ensure that the throttle body and related components are clean and functioning properly. If the problem persists, consider testing the engine’s sensors and the Engine Control Module (ECM) for faults.
Well I found out the answer on my own.................thank you very much! It turns out it was the pcv valveon my vechile. Another thing that can cause it would be your (IAC Valve) aka idle air control valve or it could be a engine vaccum leak. Good luck.
To fix error code P1506 (idle control system RPM higher than expected) on a 2001 Ford Focus 2.0 Zetec, start by inspecting the Idle Air Control (IAC) valve for proper operation; clean or replace it if necessary. Check for vacuum leaks in the intake system or around the throttle body. Additionally, ensure that the throttle position sensor (TPS) is functioning correctly and calibrated. If these steps don’t resolve the issue, consider checking for other underlying problems like a faulty ECU or wiring issues.
bad vehicle speed sensor
Error code P0581 on a Ford Explorer indicates a problem with the cruise control system, specifically related to the throttle position sensor or the cruise control switch. This code typically signifies that there is an issue with the cruise control's ability to maintain speed, potentially due to a malfunctioning component or a wiring issue. It’s advisable to inspect the cruise control system, including the throttle position sensor and related wiring, to diagnose and resolve the issue.
i have a problem with the automatic climate control the fan has only high speed
It is aturbine\speed sensor malfunction. It usually means that this speed sensor has gone bad. Good luck.
In a 1997 Ford Explorer : Control Trac is Fords name for the 4x4 system , with the 2 speed transfer case ( it has a LOW RANGE that can be used off-road )
The idle speed is controlled by the powertrain control module ( computer )