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Fault mode 27˖Oil pressure too high
Possible cause Correction
The operating temperature of the engine is too
low and the oil viscosity is high
Refer to the fault mode “Coolant temperature below
normal”
Fault of the oil pressure meter or pressure sensor Check the pressure meter and sensor, and make
replacement when necessary
The lubricating oil fails to meet the requirements
Use the lubricating oil specified in this manual and
replace the oil filter
Fault mode 28˖Oil pressure too low
Possible cause Correction
Oil level is too low Check oil level and adjust it to the specified range
Leakage of the oil pipeline Check the oil pipeline and eliminate the leakage
Oil temperature is higher than the specified value
Refer to the fault mode “Coolant temperature above
normal”
Fault of the oil pressure meter or pressure sensor Check the pressure meter and sensor, and make
replacement when necessary
Water in lubricating oil
Check the oil filler cover or the oil dipstick for their
missing. Replace the oil if required
The oil filter is blocked Replace the oil and oil filter
The lubricating oil fails to meet the requirements
and the oil viscosity is too low
Check the oil specification and replace the oil and
oil filter if necessary
Hydraulic oil in the lubricating oil Check for hydraulic oil leak, replace the oil and oil
filter if required
Fault mode 29˖Oil contamination
Possible cause Correction
Cold running of the engine leads to fuel in
lubricating oil
Check if the engine runs at idle for a too long time.
Shorten idle running time
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