PCC1302 Command Fault Code 143 Engine Oil Pressure Low Solution

This instruction show you guide on how to repair PCC1302 Command controller fault code 143 oil pressure low warning error.

Preparations:

2023 InPower V14.5 Pro V12 Diagnostic Software Free Download

PowerCommand Diagnostic 9 Pin Adapter Cable for InPower

 

 

Procedures:

Engine oil pressure is below the low oil pressure warning threshold.

Possible Cause:
1 Lubricating oil level is low
2 External leak
3 Lubricating oil does not meet specifications
4 Lubricating oil is contaminated with coolant or fuel

5 Engine angularity during operation exceeds specification
6 Coolant temperature is above specification
7 Lubricating oil filter plumbing is not routed correctly
8 Main oil pressure regulator is faulty
9 Lubricating oil suction or transfer tube is loose or broken
10 Lubricating oil pump is faulty
11 Incorrect lubricating oil cooler is installed
12 Lubricating oil cooler is plugged
13 Lubricating oil temperature is above specification
14 Piston cooling nozzles are damaged or are not installed correctly
15 Oil pressure sensor is inaccurate or blocked
16  Fault simulation is enabled or the threshold is set too high

Diagnosis and Repair:
1 Lubricating oil level is low
a Check the oil level. Add or drain oil, if necessary.

2 External leak
a Inspect the engine and surrounding area for external oil leaks.
b Tighten the capscrews, pipe plugs, and fittings.
c Replace gaskets, if necessary.

3 Lubricating oil does not meet specifications
a Verify lubricating oil meets the specifications as required per the engine manual.
b Verify alternative oil and additives were not added during the oil life.
c Verify the age of the lubricating oil.
d If necessary, take an oil sample. Refer to oil analysis technique bulletins for instructions on how to take an oil sample.

4 Lubricating oil is contaminated with coolant or fuel
a Refer to Lubricating Oil Contaminated symptom tree for proper troubleshooting.

5 Engine angularity during operation exceeds specification
a Verify rental container is level or near level.
b See engine specification to determine suitable amount of angularity.

6 Coolant temperature is above specification
a On the display or using the InPower service tool, read the engine coolant temperature.
b Compare the coolant temperature against the expected coolant temperature for that engine model. This data can be found in the engine manual.
c If the coolant temperature is outside of the expected range, refer to FC146 troubleshooting for above normal coolant temperature troubleshooting.

 

7 Lubricating oil filter plumbing is not routed correctly
a Inspect the lubricating oil filter plumbing.
b If the routing is an issue, refer to the lubricating filter plumbing procedure in the engine manual.

8 Main oil pressure regulator is faulty
a Inspect the plunger and plunger bore for nicks or scratches.
b Verify the plunger moves freely in the bore.
c Measure the pressure regulator spring at the following heights:
a At 41.25 mm (1.624 in) the pressure should be at least 127 N (29 lb).
b At 44.50 mm (1.752 in) the pressure should be at least 109 N (25 lb).
d If the regulator meets the above specifications, the regulator is not faulty.

9 Lubricating oil suction or transfer tube is loose or broken
a Inspect lubricating oil suction tube or transfer tube for leaks. Visually inspect for cracks, kinks, or tears.
b Inspect the capscrews for signs of leaks.
c Inspect the gaskets and o-rings for signs of damage, excessive wear or pinching.

10 Lubricating oil pump is faulty
a Check the oil pump for backlash.
b If the backlash is not within 0.170 mm (0.007 in) min and 0.300 mm (0.012 in) max, then the pump needs to be replaced.
c Inspect the lubricating oil pump gears for chips, cracks, or excessive wear.
d If debris is suspected of having gone through the pump, the rear cover plate may be removed to inspect for internal damage.
e Inspect the rear cover plate for scoring and grooves.
f Inspect the pump housing and generator drive for damage and excessive wear.

11 Incorrect lubricating oil cooler is installed
a Check if the correct lubricating oil cooler part number is installed. Verify against the appropriate parts manual.

12 Lubricating oil cooler is plugged
a Visually inspect the oil cooler for cleanliness.
b Refer to engine manual for instructions on how to clean the oil cooler housing.

13 Lubricating oil temperature is above specification
a On the display or using the InPower service tool, read the engine oil temperature.
b Compare the oil temperature against the expected oil temperature. Refer to engine manual for operating oil temperatures. Refer to the coolant or block heater specification for a non-running engine.
c If the oil temperature is outside of the expected range, refer to FC421 troubleshooting for above normal coolant temperature troubleshooting.

 

14 Piston cooling nozzles are damaged or are not installed correctly
a Inspect capscrew and piston cooling nozzle for damage.
b Check for leaks and improper seating.

15 Oil pressure sensor is inaccurate or blocked
a Connect the a mechanical oil pressure gauge of known quality and calibration to the engine at one of the plugs on top of the oil filter head.
b Connect InPower.
c While engine is stopped, compare the oil pressure reading on the service tool to the reading on the mechanical oil pressure gauge.
d Only proceed if engine troubleshooting has been completed. Do not attempt to start the engine if there is doubt about oil pressure.
e Start the generator set.
f Compare the oil pressure reading on the service tool to the reading on the mechanical oil pressure gauge.
g Refer to the troubleshooting and repair manual for the specific engine platform for oil pressure ranges.

16 Fault simulation is enabled or the threshold is set too high
a Connect to the control with InPower and ensure that the fault simulation for LOP is not enabled.
b Using the electronic service tool, verify that the fault threshold is NOT within the normal operating range for the oil pressure sensor. Refer to the appropriate base engine manual for normal operating range.