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HDGENE
HDGENE, Ford Senior Master/Diesel/Trans
Category: Ford
Satisfied Customers: 5439
Experience:  25 years Auto experience, Ford ,GM, Chrysler, Asian & European
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Have fault code P012F and p0087. not sure which came first.

Customer Question

Have fault code P012F and p0087. not sure which came first. 3 weeks ago had oil change and both FF. Oil is more than 1" above max fill line. The company that did the work said my oil cooler is letting coolant and oil mix that is why the level is high (but the oil is not milky!). this company wants to replace oil cooler for $3400. should they check sensor or anything first before replacing it? Any thoughts?
Submitted: 12 months ago.
Category: Ford
Expert:  HDGENE replied 12 months ago.

Hello, The first code is a corelation issue as shown below, a scan tool will verify the sensor data which they most likely did when they pulled the codes. The other code if you wrote it correctly is a fuel system code. If the cooling system level is low, this would be a good idication of their diagnosis being correct, but it is possible the ECT or EOT sensor is at fault. If the fuel system is having an issue such as an injector leaking fuel, this would cause the oil level to be higher and not have a milky look to the engine oil.

P012F - Engine Coolant Temperature/Engine Oil Temperature Correlation

Description:This DTC sets when the maximum difference between the engine coolant temperature and the engine oil temperature exceeds the calibrated threshold for a prescribed amount of time depending on engine operating conditions.

Possible Causes:

  • Low engine coolant level
  • Cooling system flow concerns
  • Cooling system pressure loss
  • ECT sensor
  • EOT sensor
  • Oil cooler flow concerns

Diagnostic Aids:The threshold value varies between 9°C (16°F) and 17°C (30°F) depending on the speed and load applied to the vehicle.

P0087 - Fuel Rail/System Pressure - Too Low

Description:The powertrain control module (PCM) regulates the fuel rail pressure by controlling the fuel volume control valve and fuel pressure control valve. When the PCM is no longer capable of maintaining the fuel pressure the DTC is set.

Possible Causes:

  • Low pressure fuel system
  • Fuel pressure control valve stuck open
  • Fuel volume control valve stuck closed
  • Leaking fuel injector

Diagnostic Aids:Use the high pressure fuel injection pump 4-pin inline connector to diagnose the fuel volume control valve and fuel pressure control valve.

Customer: replied 12 months ago.
They said the oil cooler was the where the two were mixing. If indeed there is an injector leaking causing fuel to go into the oil would that cause the temp code to alarm?
Expert:  HDGENE replied 12 months ago.

No it would be two seperate concerns. if one of the sensors isnt reading correctly it will set the corelation code, it looks for te two sensors to read within a certain temperature range of each other. If it falls out of this range, it will set that code. Not uncommon to see an injector leak and fill the crankcase with fuel if you have the low fuel pressure code. As you said, if coolant was mixing with the oil, the oil would be milky, if oil is mixing with the coolant, you would see it as well, if the coolant level is low, this is another tell tale issue with a coolant leak.

Expert:  HDGENE replied 12 months ago.

DO you need more help with this concern?

Expert:  HDGENE replied 12 months ago.

Hello, do you need more help?

Expert:  HDGENE replied 11 months ago.

Do you need more help with this concern? The question remains open until it is rated

Expert:  HDGENE replied 11 months ago.

Hello, do you need more help with this concern?

Expert:  HDGENE replied 11 months ago.

Hello, do you need more help with this concern? The question remains open until it is rated