Test Description

WARNING: This page is about a different variant/trim than selected.

The number below refers to the step number on the diagnostic table.

2: This test determines whether the engine can achieve the commanded RPM.

DTC P0506

Step	Action	Yes	No
Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Controls Connector End Views or Engine Control Module (ECM) Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Start the engine. Command the engine speed up to 1,600 RPM, down to 600 RPM, and up to 1,600 RPM with a scan tool. Exit the RPM control function. Does the engine speed correspond, within 100 RPM, with each command?	Go to Intermittent Conditions	Go to Step 3
3	Inspect for any condition that can reduce idle speed by increasing engine load. Examples include: Incorrect torque converter clutch (TCC) operation Excessive deposits in the throttle body Accessories that require additional torque to operate Restricted exhaust Mechanical conditions that limit engine speed Did you complete the action?	Go to Step 4	-
4	Clear the DTCs with a scan tool. Turn OFF the ignition for 90 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	Go to Step 2	Go to Step 5
5	IMPORTANT: Be aware that repairing one individual condition may correct more than one DTC. Observe the Capture Info with a scan tool.Are there any DTCs that have not been diagnosed?	Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information	System OK