2012 Jeep Wrangler JK Factory Service Manual 28 - DTC-Based Diagnostics

P06DE-DUAL STAGE OIL PUMP STUCK HIGH

P06DE-DUAL STAGE OIL PUMP STUCK HIGH

For a complete wiring diagram, refer to the Wiring Information.


Theory of operation

The engine oil pump features seven vanes and a moving element that continuously adjusts to maintain a regulated oil pressure supply by varying the displacement of the pump. The pump has two regulated pressure stages of operation controlled by an on/off solenoid. Low pressure mode regulation (solenoid on) is approximately 200 kPa (29 psi) and high pressure mode regulation (solenoid off) is approximately 450 kPa (65 psi). The Powertrain Control Module (PCM) switches the pump between stages based on engine operating conditions, oil and coolant temperatures, speed and load. Under most typical conditions, the pump will run in low mode from idle up to around 3000 rpm and switch from low to high mode between 3000 and 4000 rpm. The maximum oil pressure in the engine is limited to 1000 kPa (145 psi) by the relief valve. Pressure in the main oil gallery of the engine can be monitored with diagnostic equipment through the oil pressure sensor mounted on the rear of the oil filter module. The minimum pressure for the engine is 41 kPa (6 psi) at any operating condition. Anything under this pressure could result in damage to critical moving parts.


Possible Causes

ENGINE MECHANICAL FAILURE
ENGINE OIL PRESSURE SENSOR
DUAL STAGE OIL PUMP

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).


1. ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)



NOTE: Make sure that the engine oil is at the proper level. Also, review the customers oil change history to ensure that the oil is being changed at the correct intervals and that the proper oil viscosity is being used.
1. Start the engine and allow it to reach normal operating temperature.

WARNING:

When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.

2. Using the scan tool, read the active DTCs.


Is the DTC Active at this time?

Yes


No


2. ENGINE OIL/ENGINE MECHANICAL

1. Turn the ignition off.
2. The following items should be considered before determining the cause of this DTC:

  • ENGINE MECHANICAL TOLERANCES OUT OF SPECIFICATION
  • ENGINE OIL PRESSURE OUT OF SPECIFICATION
  • LOW ENGINE OIL
  • DETERIORATED OR DIRTY OIL
  • ENGINE OIL CONTAMINATED (i.e., coolant and/or fuel)


NOTE: Failure to do so may lead to misdiagnosis.
3. If any of the above conditions are found, repair as necessary


Were any of the above conditions present?

Yes


No


3. DUAL STAGE OIL PUMP



NOTE: The 3.6L Oil pump is released as an assembly. The assembly includes both the pump and the solenoid. There are no serviceable sub-assembly components. In the event the oil pump or solenoid are not functioning or out of specification they must be replaced as an assembly.
1. Replace the Oil Pressure Sensor accordance with the Service Information.
2. Turn the ignition on.
3. Using the scan tool, erase the DTCs.
4. Start the engine and allow it to reach normal operating temperature.
5. Drive the vehicle get the engne within the set conditionsi.
6. Using the scan tool, read the active DTCs.


Did the DTC return?

Yes


No