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Old 05-14-2015, 02:30 PM
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I've had my CAT and my oil pump replaced. I still receive a code: P066D

Hey everybody.

I had my 2014 JK's CAT and just recently, the oil pump replaced. The check engine light came on, and I still receive an error code(P066D). The Jeep runs fine, but if I'm parking in reverse, the heat gauge rises past half, and I can hear what I assume the fans working harder. Also, very rarely, if I begin to floor it, the tachometer stops at about 3000RPM, and feels sluggish for a brief moment, and then the jeep will drive normally. VERY rarely does that happen.

What can the issue be? This is beginning to frustrate me

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Old 05-14-2015, 02:59 PM   #2
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Do you have any aftermarket accessories to speak of? Have you checked the bateery and made sure the terminals are clean and tight? The computer controls everything on these rigs.

Bob K.

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Old 05-14-2015, 04:00 PM
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Do you have any aftermarket accessories to speak of? Have you checked the bateery and made sure the terminals are clean and tight? The computer controls everything on these rigs. Bob K.
Nothing aftermarket. I'll have to check out the battery. I haven't done that. Thanks
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Old 05-14-2015, 08:30 PM   #4
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Any chance you meant p06dd. That is a code referring to oil pressure. Have you done your own oil change? Looks like the wrong filter may cause this code. If not you should get it back to the dealer. I wouldn't mess around with oil pressure problems.
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Old 05-14-2015, 08:52 PM
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Any chance you meant p06dd. That is a code referring to oil pressure. Have you done your own oil change? Looks like the wrong filter may cause this code. If not you should get it back to the dealer. I wouldn't mess around with oil pressure problems.
OH! Yeah. Sorry, it is P06DD. I recently had done oil changes and filter changes by a local mechanic shop. But I took it to dealer yesterday and I believe they did change the oil and filter.

I'm going again tomorrow, I'll ask for it again
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Old 05-14-2015, 08:58 PM   #6
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I know some oil filter companies list the same filters for 2012-2014. They are not the same filters. I had to fight with my filter supplier to get the right ones.
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Old 05-21-2015, 02:30 PM
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Okay, so I just got my Jeep back from the dealer. Again. So, the oil pressure sensor was changed. The engine light still came on. If I floor it, it feels like it loses power until I let off of the gas.

What could it be? I feel like I've ruined my jeep and I'm so sad
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Old 05-21-2015, 05:40 PM   #8
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From SnapOn Shopkey Pro;

THEORY OF OPERATION [ P06DD-DUAL STAGE OIL PUMP STUCK LOW ]

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 galley 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.

SET CONDITION [ P06DD-DUAL STAGE OIL PUMP STUCK LOW ]

The Powertrain Control Module (PCM) senses the oil pressure is less than a low threshold for 5.0 seconds. One Trip fault.

SET CONDITION [ DIAGNOSIS AND TESTING : P06DD-DUAL STAGE OIL PUMP STUCK LOW ]

The Powertrain Control Module (PCM) senses the oil pressure is less than a low threshold for 5.0 seconds. One Trip fault.

WHEN MONITORED [ P06DD-DUAL STAGE OIL PUMP STUCK LOW ]

The monitor runs when engine speed (RPM) is over a calibrated value, based on engine oil temperature. When the engine oil temperature is lower, the engine speed necessary to enable the monitor will be lower (Minimum speed is 1000 RPM). To evaluate the dual stage oil pump, fully warm up the engine. To run DUAL STAGE OIL PUMP STUCK LOW (P06DD), drive vehicle with engine speed over 3500 RPM.

WHEN MONITORED [ DIAGNOSIS AND TESTING : P06DD-DUAL STAGE OIL PUMP STUCK LOW ]

The monitor runs when engine speed (RPM) is over a calibrated value, based on engine oil temperature. When the engine oil temperature is lower, the engine speed necessary to enable the monitor will be lower (Minimum speed is 1000 RPM). To evaluate the dual stage oil pump, fully warm up the engine. To run DUAL STAGE OIL PUMP STUCK LOW (P06DD), drive vehicle with engine speed over 3500 RPM.

POSSIBLE CAUSES [ DIAGNOSIS AND TESTING : P06DD-DUAL STAGE OIL PUMP STUCK LOW ]

INCORRECT OIL FILTER
ENGINE MECHANICAL FAILURE
ENGINE OIL PRESSURE SENSOR
DUAL STAGE OIL PUMP
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Old 05-21-2015, 06:13 PM   #9
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Originally Posted by HazyVortex View Post
Okay, so I just got my Jeep back from the dealer. Again. So, the oil pressure sensor was changed. The engine light still came on. If I floor it, it feels like it loses power until I let off of the gas.

What could it be? I feel like I've ruined my jeep and I'm so sad
I don't think you ruined anything, it could be as simple as the wrong oil viscosity (if the Dealer never did re-change the oil).
Maybe you should find another Dealer as the one your using seems to put the cart before horse, diagnostically anyway..

Here is the proper diagnostic series;

DIAGNOSTIC TEST [ DIAGNOSIS AND TESTING : P06DD-DUAL STAGE OIL PUMP STUCK LOW ]

ACTIVE DTC
(NOTE: Make sure that the engine oil is at the proper level and ensure that an OEM specified oil filter is being used. Also, review the customers oil change history to make sure 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.)

Using the scan tool, read the active DTCs.

Is the DTC Active at this time?

Yes = Go To 2

No = Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION.

2) ENGINE OIL/ENGINE MECHANICAL
Turn the ignition off.
The following items should be considered before determining the cause of this DTC:
OIL FILTER MUST MEET OEM SPECIFICATIONS
OIL FILTER O-RING FOR DAMAGED, MISSING, OR MIS-INSTALLED
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.)

If any of the above conditions are found, repair as necessary

Were any of the above conditions present?

Yes = Repair as necessary.

No = Go To 3

3) DUAL STAGE OIL PUMP
In addition to the P06DD fault code, are any of the following Oil Pressure Sensor related fault codes pending, active, or stored: P0520, P0521, P0522, P0523, or P1524?

Yes = Perform diagnostic procedure for any of the above fault codes that are present.

No = Replace the Oil Pump in accordance with the service information.

(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)
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Old 05-21-2015, 07:30 PM
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I don't think you ruined anything, it could be as simple as the wrong oil viscosity (if the Dealer never did re-change the oil). Maybe you should find another Dealer as the one your using seems to put the cart before horse, diagnostically anyway.. Here is the proper diagnostic series; DIAGNOSTIC TEST [ DIAGNOSIS AND TESTING : P06DD-DUAL STAGE OIL PUMP STUCK LOW ] ACTIVE DTC (NOTE: Make sure that the engine oil is at the proper level and ensure that an OEM specified oil filter is being used. Also, review the customers oil change history to make sure 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.) Using the scan tool, read the active DTCs. Is the DTC Active at this time? Yes = Go To 2 No = Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION. 2) ENGINE OIL/ENGINE MECHANICAL Turn the ignition off. The following items should be considered before determining the cause of this DTC: OIL FILTER MUST MEET OEM SPECIFICATIONS OIL FILTER O-RING FOR DAMAGED, MISSING, OR MIS-INSTALLED 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.) If any of the above conditions are found, repair as necessary Were any of the above conditions present? Yes = Repair as necessary. No = Go To 3 3) DUAL STAGE OIL PUMP In addition to the P06DD fault code, are any of the following Oil Pressure Sensor related fault codes pending, active, or stored: P0520, P0521, P0522, P0523, or P1524? Yes = Perform diagnostic procedure for any of the above fault codes that are present. No = Replace the Oil Pump in accordance with the service information. (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)
I sure hope so! Because a while ago I've had my jeep stuck in muddy water. About stock bumper height.

Anyway, thanks for all the info. When I got stuck, I had a local mechanic change the filter and the oil. That may be the issue. I had faith that my dealer did in fact change the oil and the filter, but maybe I was wrong. I had no other error codes. The CAT, and the oil pressure sensor, and the oil pump was replaced. Hell, I think I'm gonna buy the OEM filter and the OEM oil and change it myself. See what happens
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Old 05-22-2015, 11:47 AM   #11
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Your symptoms point toward a pump/solenoid issue.
If oil pressure is not switched (between 3000-4000rpm) the PCM will engage limp mode (loss of performance) to prevent further damage.

This is relatively simple to diagnose however for a compentent mechanic with proper tools, as oil pressure & switching can be observed via scanner & mechanically verified via installed gauge.

This could also be related to engine temperature issues as that is also a component of the oil pressure switching cycle.

Of course low oil pressure can be caused by excessive engine bearing clearances but this should have been ascertained before the first pump was installed if water contamination was suspect.
Now it's on them to explain why they replaced a pump on an already damaged engine, should a denial for warranty claim happen.
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Old 05-22-2015, 04:04 PM
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Your symptoms point toward a pump/solenoid issue. If oil pressure is not switched (between 3000-4000rpm) the PCM will engage limp mode (loss of performance) to prevent further damage. This is relatively simple to diagnose however for a compentent mechanic with proper tools, as oil pressure & switching can be observed via scanner & mechanically verified via installed gauge. This could also be related to engine temperature issues as that is also a component of the oil pressure switching cycle. Of course low oil pressure can be caused by excessive engine bearing clearances but this should have been ascertained before the first pump was installed if water contamination was suspect. Now it's on them to explain why they replaced a pump on an already damaged engine, should a denial for warranty claim happen.
I'm here at another Jeep dealership. I'm getting the oil and the filter changed to see how it runs. So far, the previous dealership has replaced every part under the warranty.

Oh boy, my engine is ruined? Would the warranty replace the entire engine?
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Old 05-22-2015, 04:37 PM
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Got my Jeep back. So far it doesn't feel sluggish. It hasn't suddenly lost power like you mentioned. Although, the temperature gauge did go up when I turned the heater off.
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Old 05-24-2015, 10:55 AM
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CEL is also back on. When I'm home I'm gonna see what the code is.
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Old 06-04-2015, 05:05 PM
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Dealership called. They found water in the engine. They're gonna call tomorrow morning to see if the warranty will cover it
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Old 06-04-2015, 06:05 PM   #16
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I suspect the answer will be WARRANTY-VOID due to abuse....
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Old 06-04-2015, 06:15 PM
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I suspect the answer will be WARRANTY-VOID due to abuse....
Yup, that's exactly what I suspect will happen. Darn
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Old 06-04-2015, 06:16 PM
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Old 06-04-2015, 09:13 PM
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Picked up the jeep. They called staying it's ready. Warranty covered everything!

Turns out I had a few more DTC code: p0502, oil pressure sensor circuit and p0394 Cam sensor INOP 2/2 WAR(not sure what that means) Cam sensor was stuck INOP

They also replaced the oil adapter housing and lower and upper intake seals. The housing was contaminated.

All under warranty. Jeep runs so much better. However, once I'm nearing my house, and backing up into the driveway, it begins to overheat. I'll see what happens. I'm gonna disconnect the battery for a bit during the night and see how it runs tomorrow
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Old 07-08-2015, 12:12 PM
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Jeep dealership called. From what I understood, the 'lower half' of the engine is being replaced. Not sure exactly what he meant.

I'll keep this thread updated with more info. Hopefully someone will benefit from this in the future
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Old 07-13-2015, 11:42 AM
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Dealership called. They ordered a brand new engine. However, the warranty will not cover the engine swap. Once they were about to begin the engine swap, they noticed dirt/mud was everywhere in the engine. So the dealership is denying the warranty. Hopefully my insurance will cover it.

If they don't, what's my best option? I still owe $9K for the jeep. How much would it cost to swap the engine? Including labor too.
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Old 07-13-2015, 01:04 PM   #22
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Dealership called. They ordered a brand new engine. However, the warranty will not cover the engine swap. Once they were about to begin the engine swap, they noticed dirt/mud was everywhere in the engine. So the dealership is denying the warranty. Hopefully my insurance will cover it. If they don't, what's my best option? I still owe $9K for the jeep. How much would it cost to swap the engine? Including labor too.
Is doing the swap yourself not an option?
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Old 07-13-2015, 01:18 PM
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Is doing the swap yourself not an option?
I unfortunately do not know how to. The insurance agent is gonna take a look at the jeep
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Old 07-13-2015, 07:52 PM   #24
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If insurance doesn't cover it, I would suggest doing it yourself. It's really not that hard. You just gotta put things back the way they were. If you can get your hands on an engine joist and a stand. With basic hand tools and a decent torque wrench. You can do it. It took me and my brother a day to swap one then a day for filling fluids, burping coolant and testing etc. Granted it wasn't a new engine like these. It was a YJ. But still.
We started by dropping the trans and transfer case. Then removed everything the new engine didn't have on it. Had the new engine on the engine stand and added parts as we took them off. Removed the grill and radiator. And put the engine, trans and x case on as one unit. If you have a buddy who will help you from start to finish and a garage. You're laughing. Especially if they are giving you a new engine under warranty.
Well, good luck to you!

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