P0507

DTC P0507

DTC DESCRIPTORS

DTC P0506
Idle Speed Low

DTC P0507
Idle Speed High

DIAGNOSTIC FAULT INFORMATION
- Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
- If any other DTCs are set diagnose those first.

CIRCUIT/SYSTEM DESCRIPTION
The engine control module (ECM) adjusts the fuel delivery in order to control crankshaft speed at idle. The ECM monitors the engine speed and will detect an out of range idle speed for the amount of fuel that is delivered.

CONDITIONS FOR RUNNING
- DTCs P0016, P0117, P0118, P0335, or P0336 are not set.
- The engine is running at idle.
- The engine coolant temperature (ECT) is more than 50°C (122°F).
- The accelerator pedal position (APP) angle is 0 percent.
- These DTCs run continuously in a 100 ms test loop.

CONDITIONS FOR SETTING

P0506
The ECM detects the actual idle speed is more than 100 RPM under the desired idle speed for more than 19 seconds.

P0507
The ECM detects the actual idle speed is more than 200 RPM over the desired idle speed for more than 19 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS
Inspect for any of the following conditions:
- A crankcase overfill can cause oil to be forced through the positive crankcase ventilation (PCV) system.
- An outside source that has allowed oil or fuel to enter the air induction system.
- An aftermarket performance kit using an external fuel source.

SPECIAL TOOLS REQUIRED
J 46091 Charge Air Cooler Tester

CIRCUIT/SYSTEM VERIFICATION
1. With a scan tool, compare the Desired Idle Speed to the Engine Speed. Both engine speed parameters should be within 50 RPM of each other.
2. Elevate the engine speed in 25 RPM increments to 1300 RPM using a scan tool. With each commanded increment, the actual Engine Speed should stay within 25 RPM of the commanded speed.

CIRCUIT/SYSTEM TESTING

IMPORTANT: If you cannot duplicate the condition, 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.

1. If there are any other DTCs set diagnose those first.
2. Attempt to start the engine.
- If the engine does not start refer to Engine Cranks but Does Not Run.
3. Verify the integrity of the air induction system and turbocharger intercooler pipes and hoses by inspecting for the following conditions:
- Damaged components
- Loose or improper installation
- An air flow restriction
- Any turbocharger pressure leak
- Water intrusion
- If an abnormal condition is found, perform the necessary repairs.
4. Inspect for any condition that can reduce idle speed by increasing engine load.
- Incorrect torque converter clutch (TCC) operation
- Accessories that require additional torque to operate
- Restricted exhaust
- Mechanical conditions that limit engine speed
- If any abnormal conditions are present, refer to Restricted Exhaust or Symptoms - Engine.

REPAIR INSTRUCTIONS
Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control module replacement, setup, and programming.