Technical Section > Engine/Transmission/Powertrain/Exhaust

P06DE and low oil pressure warning

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jonnybump:
Hi all, I have a 2014 CX-5 2.2D with 115000 miles and yesterday my car threw the above code with error message stating "Low Oil Pressure" and entered limp home mode. I immediately pulled over and stopped the car, thinking the worst (that the oil pump chain had snapped as many have had an issue with), called Green Flag and they sent out an engineer.

The engineer plugged his diagnostic machine in and it showed a P06DE error code, he cleared the code and started the car. He said the pump was definitely working and the engine was running fine, oil level was good. He said it would be fine for me to drive home. I drove it back, taking it easy, and the car entered limp home mode three times, with the same error message. Every time, I pulled over and turned the car off which reset it.

When I got home I plugged my laptop in and ran Forscan to check the oil pressure reading - at hot idle it was showing 120kpa. Is it me or does that seem low-ish? When I drove the car this morning I left Forscan connected and ran the oscillope, it showed cold idle oil pressure of 155kpa. When accelerating, pressure increased to 250-350kpa, then when changing gear the pressure dropped sharply to 80kpa, bouncing back up to 120kpa almost instantly.

Oil was changed 3000 miles ago, do you think this could be something to do with the oil solenoid valve that controls the dual stage pump? P06DE is described as "Engine Oil Pressure Control Circuit Stuck On".

Thanks
Jon

jonnybump:
UPDATE - I plugged Forscan in to monitor the drive home from work. Not far into the journey is quite a steep hill that leads to the motorway. Halfway up the hill the car returned a red warning triangle and advised to get the car checked by the garage. It did not throw the low engine pressure error - the DTC stored in the memory is P06DE, same as yesterday. Everything remained normal, except looking at the data, the ENGINE OIL PRESSURE DUTY CYCLE, which is normally around 60% dropped to zero for the remainder of the journey.

Anchorman:
Try changing the oil and resetting the oil data - this must be done via the test wire under the bonnet.

jonnybump:
I will be changing the oil, but this morning I drove the car in to work and the warning came up almost instantly (Low Oil Pressure P055F Engine Oil Pressure Out of Range). The oscillope showed that the oil pressure was dangerously low - 80kpa and at times dipping slightly lower than that. I've had to abandon the car, I didn't want to cause any lasting damage.

I'm going to drop the sump and see if the oil pickup/strainer is clogged, I've heard some people have had that issue with this particular model. Not what I need just before Christmas!  :(

Anchorman:

--- Quote from: jonnybump on December 17, 2019, 07:51:52 am ---I will be changing the oil, but this morning I drove the car in to work and the warning came up almost instantly (Low Oil Pressure P055F Engine Oil Pressure Out of Range). The oscillope showed that the oil pressure was dangerously low - 80kpa and at times dipping slightly lower than that. I've had to abandon the car, I didn't want to cause any lasting damage.

I'm going to drop the sump and see if the oil pickup/strainer is clogged, I've heard some people have had that issue with this particular model. Not what I need just before Christmas!  :(

--- End quote ---

Probably a good idea.  Apparently new ones are very cheap so if it is clogged it might be easier.

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